Updated on 2025/11/21

写真a

 
TATEYAMA YOSHITAKA
 
Organization
Institute of Integrated Research Laboratory for Chemistry and Life Science Professor
Title
Professor
External link

Degree

  • Ph. D ( 1998.3   The University of Tokyo )

Research Interests

  • 不均一系触媒

  • 統計力学

  • 第一原理計算

  • 二次電池・蓄電池

  • 電子移動

  • 酸化還元

  • 界面

Research Areas

  • Nanotechnology/Materials / Energy chemistry

  • Nanotechnology/Materials / Fundamental physical chemistry

  • Natural Science / Semiconductors, optical properties of condensed matter and atomic physics

  • Natural Science / Mathematical physics and fundamental theory of condensed matter physics

Education

  • The University of Tokyo   Graduate school of science   Doctor course (physics)

    1995.4 - 1998.3

      More details

  • The University of Tokyo   Graduate school of science   Master course (physics)

    1993.4 - 1995.3

      More details

  • The University of Tokyo   Faculty of Science   Department of Physics

    1991.4 - 1993.3

      More details

  • The University of Tokyo

    1989.4 - 1991.3

      More details

Research History

  • Institute of Science Tokyo (Science Tokyo)   Laboratory for Chemistry and Life Science (CLS), Institute of Integrated Research (IIR)   Professor

    2024.10

      More details

  • Tokyo Institute of Technology   Laboratory for Chemistry and Life Science (CLS), Institute of Innovative Research (IIR)   Professor

    2023.10 - 2024.9

      More details

  • National Institute for Materials Science   Research Center for Energy and Environmental Materials (GREEN)   Director

    2023.4 - 2024.3

      More details

  • National Institute for Materials Science   GREEN   Deputy Director

    2021.4 - 2023.3

      More details

  • Waseda University   Visiting Professor

    2019.4 - 2025.3

      More details

  • Tokyo Institute of Technology   Visiting Professor

    2019.4 - 2023.9

      More details

  • (国研)物質・材料研究機構   国際ナノアーキテクトニクス研究拠点(MANA)   MANA 主任研究者

    2016.7 - 2023.3

      More details

  • National Institute for Materials Science   Research Center for Energy and Environmental Materials   Group Leader

    2016.4 - 2025.3

      More details

  • Kyoto University

    2016.4 - 2022.3

      More details

  • (国研)物質・材料研究機構   情報統合型物質・材料研究拠点(MI2I) 蓄電池材料グループ   サブグループリーダー

    2015.7 - 2020.3

      More details

  • Kyoto University

    2012.7 - 2016.3

      More details

  • (独)科学技術振興機構   「エネルギー高効率利用と相界面」領域   さきがけ研究者

    2011.12 - 2015.3

      More details

  • (独)物質・材料研究機構   国際ナノアーキテクトニクス研究拠点(MANA)   グループリーダー

    2011.4 - 2016.3

      More details

  • (独) 科学技術振興機構(JST)   「界面の構造と制御」領域   さきがけ研究者

    2007.10 - 2011.3

      More details

  • (独)物質・材料研究機構   国際ナノアーキテクトニクス研究拠点(MANA)   独立研究者

    2007.10 - 2011.3

      More details

  • The University of Tokyo   The Institute for Solid State Physics

    2006.4 - 2006.9

      More details

  • ケンブリッジ大学   化学科   客員研究者

    2003.10 - 2004.10

      More details

  • National Institute for Materials Science

    2001.4 - 2007.9

      More details

  • 科学技術庁 金属材料技術研究所   計算材料科学研究部   研究員

    1998.4 - 2001.3

      More details

▼display all

Committee Memberships

  • 文部科学省   HPCI計画推進委員会  

    2023.4   

      More details

    Committee type:Government

    researchmap

  • 公益社団法人 電気化学会 電池技術委員会   役員  

    2023.4 - 2025.3   

      More details

    Committee type:Academic society

    researchmap

  • 一般社団法人 日本固体イオニクス学会   社員  

    2021.11   

      More details

    Committee type:Academic society

    researchmap

  • 科学技術振興機構(JST)   JSTさきがけ「革新的触媒」領域アドバイザー  

    2015.4 - 2020.3   

      More details

    Committee type:Government

    researchmap

  • 文部科学省   環境エネルギー科学技術委員会 委員(第7期・第8期)  

    2013.3 - 2017.2   

      More details

    Committee type:Government

    researchmap

Papers

  • Unveiling Dominant Processes of Na Cluster Formation and Na‐Ion Diffusion in Hard Carbon Nano‐Pore: A DFT‐MD Study

    Che‐an Lin, Huu Duc Luong, Ryoma Sasaki, Yoshitaka Tateyama

    Advanced Energy Materials   2025.11

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/aenm.202505227

    researchmap

  • Synthesis and Electrochemistry of Stacking Fault‐Free β‐NaMnO2

    Shinichi Kumakura, Kei Kubota, Syuhei Sato, Yusuke Miura, Huu Duc Luong, Eun Jeong Kim, Yoshinobu Miyazaki, Tomohiro Saito, Yoshitaka Tateyama, Shinichi Komaba

    Advanced Materials   2025.10

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/adma.202507011

    researchmap

  • Dissimilar Diffusion Mechanisms of Li+, Na+, and K+ Ions in Anhydrous Fe-Based Prussian Blue Cathode Reviewed

    Dan Ito, Seong-Hoon Jang, Hideo Ando, Toshiyuki Momma, Yoshitaka Tateyama

    Journal of the American Chemical Society   147   25441 - 25453   2025.6

     More details

    Authorship:Last author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/jacs.5c05274

    researchmap

  • Capacity Estimation and Knee Point Prediction Using Electrochemical Impedance Spectroscopy for Lithium Metal Battery Degradation via Machine Learning Reviewed

    Qianli Si, Shoichi Matsuda, Yasunobu Ando, Toshiyuki Momma, Yoshitaka Tateyama

    Advanced Science   2502336   2025.5

     More details

    Authorship:Last author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/advs.202502336

    researchmap

  • Global Trends in Battery Research and Development: The Contribution of the Center for Advanced Battery Collaboration Invited Reviewed

    Kei NISHIKAWA, Takuya MASUDA, Yibin XU, Yoshitaka TATEYAMA, Shoichi MATSUDA, Shuji NAKANISHI, Shotaro HANADA, Yoshiharu MUKOUYAMA, Toshihiko MANDAI, Naoaki KUWATA, Tsuyoshi OHNISHI, Kiyoshi KANAMURA

    Electrochemistry   93   06200   2025.4

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.5796/electrochemistry.25-71059

    researchmap

  • Simultaneous migration mechanism of Co-O couple toward spinel-like Co3O4 formation on Li CoO2 surfaces Reviewed

    Huu Duc Luong, Zizhen Zhou, Yoshitaka Tateyama

    Journal of Power Sources   641   236854   2025.3

     More details

    Authorship:Last author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.jpowsour.2025.236854

    researchmap

  • Constant-Current Nonequilibrium Molecular Dynamics Approach for Accelerated Computation of Ionic Conductivity Including Ion-Ion Correlation Reviewed

    Ryoma Sasaki, Yoshitaka Tateyama, Debra J. Searles

    PRX Energy   4   013005   2025.2

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PRXEnergy.4.013005

    researchmap

  • Microstructure-controlled Li ion conductive oxide-based ceramic solid electrolytes supporting high current densities

    Yoshitaka Tateyama

    Electrochimica Acta   2025

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/J.ELECTACTA.2025.146233

    Web of Science

    researchmap

  • Ion diffusion driven by dynamic lattice deformations in perovskite solid electrolytes

    Bo Gao, Randy Jalem, Yoshitaka Tateyama

    Journal of Materials Chemistry A   2025

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/D5TA03232F

    researchmap

  • Dual influence of protonation on Li-ion transport in garnet solid electrolytes: A first-principles study Reviewed

    Feye-Feng Lu, Huu Duc Luong, Seong-Hoon Jang, Randy Jalem, Yoshitaka Tateyama, Hong-Kang Tian

    Journal of Power Sources   628   235906   2024.11

     More details

    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.jpowsour.2024.235906

    researchmap

  • Proton Intercalation of Mo3Nb2O14 Anode for Aqueous Batteries

    Kosuke Kawai, Yuta Igarashi, Seon Joon Jang, Koji Yazawa, Kazuma Gotoh, Jun Kikkawa, Atsuo Yamada, Yoshitaka Tateyama, Masashi Okubo

    ECS Meeting Abstracts   2024.11

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1149/MA2024-0291341mtgabs

    researchmap

  • Proton Intercalation into an Open‐Tunnel Bronze Phase with Near‐Zero Volume Change

    Kosuke Kawai, Seong‐Hoon Jang, Yuta Igarashi, Koji Yazawa, Kazuma Gotoh, Jun Kikkawa, Atsuo Yamada, Yoshitaka Tateyama, Masashi Okubo

    Angewandte Chemie International Edition   2024.10

     More details

    Publishing type:Research paper (scientific journal)   Publisher:Wiley  

    Abstract

    Managing safety and supply‐chain risks associated with lithium‐ion batteries (LIBs) is an urgent task for sustainable development. Aqueous proton batteries are attractive alternatives to LIBs because using water and protons addresses these two risks. However, most host materials undergo large volume changes upon H+ intercalation, which induces intraparticle cracking to accelerates parasitic reactions. Herein, we report that Mo3Nb2O14 bronze exhibits reversible H+ intercalation (200 mAh g−1) with a Coulombic efficiency of 99.7 % owing to near‐zero volume change and solid‐solution‐type phase transition. Combination of experimental and theoretical analyses clarifies that rotation and shrinkage of open tunnels, which consist of flexible corner‐sharing Mo/NbOn polyhedra, relieve local structural distortions upon H+ intercalation to suppress intraparticle cracking. The prototype full cell of an aqueous proton battery with a Mo3Nb2O14 anode operates stably over 1000 charge/discharge cycles. This study reveals the importance of implementing distortion‐relieving voids in host materials to reduce volume change upon charge/discharge.

    DOI: 10.1002/anie.202410971

    researchmap

    Other Link: https://onlinelibrary.wiley.com/doi/pdf/10.1002/anie.202410971

  • Predicting Room‐Temperature Conductivity of Na‐Ion Super Ionic Conductors with the Minimal Number of Easily‐Accessible Descriptors Reviewed

    Seong‐Hoon Jang, Randy Jalem, Yoshitaka Tateyama

    Advanced Energy and Sustainability Research   5   2400158   2024.10

     More details

    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/aesr.202400158

    researchmap

  • LiNbO3 and LiTaO3 Coating Effects on the Interface of the LiCoO2 Cathode: A DFT Study of Li-Ion Transport

    Zizhen Zhou, Huu Duc Luong, Bo Gao, Toshiyuki Momma, Yoshitaka Tateyama

    ACS Applied Materials & Interfaces   2024.8

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acsami.4c05737

    researchmap

  • Computational discovery of stable Na-ion sulfide solid electrolytes with high conductivity at room temperature

    Seong-Hoon Jang, Randy Jalem, Yoshitaka Tateyama

    Journal of Materials Chemistry A   2024

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/D4TA02522A

    researchmap

  • Data-Driven Cycle Life Prediction of Lithium Metal-Based Rechargeable Battery Based on Discharge/Charge Capacity and Relaxation Features

    Si, Q., Matsuda, S., Yamaji, Y., Momma, T., Tateyama, Y.

    Advanced Science   2024

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/advs.202402608

    Scopus

    researchmap

  • Unified understanding and mitigation of detrimental phase transition in cobalt-free LiNiO2

    Konuma, I., Ikeda, N., Camp{\'e}on, B.D.L., Fujimura, H., Kikkawa, J., Luong, H.D., Tateyama, Y., Ugata, Y., Yonemura, M., Ishigaki, T., Aida, T., Yabuuchi, N.

    Energy Storage Materials   66   2024

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ensm.2024.103200

    Scopus

    researchmap

  • Glyme Solvent Decomposition on Spinel Cathode Surface in Magnesium Battery

    Wenchong Zhou, Chenchao Xu, Bo Gao, Masanobu Nakayama, Shunsuke Yagi, Yoshitaka Tateyama

    ACS Energy Letters   8 ( 10 )   4113 - 4118   2023.10

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acsenergylett.3c01084

    Scopus

    researchmap

  • Theoretical Prediction and High-Pressure Synthesis of New LISICON-Type Solid-State Electrolyte Li2.75[B0.625P0.125S0.25]O3.375

    Masahito Ikeda, Randy Jalem, Gen Hasegawa, Naoaki Kuwata, Qiumin Liu, Takafumi Yamamoto, Kei Shigematsu, Yoshitaka Tateyama, Masaki Azuma

    The Journal of Physical Chemistry C   2023.7

     More details

    Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society (ACS)  

    DOI: 10.1021/acs.jpcc.3c02842

    researchmap

  • Exploration of Organic Cathode Active Materials with High Energy Densities for Li-Ion Batteries via First-Principles Calculations

    Yoshitaka Tateyama, Akiko Kagatsume, Masaru Yao, Shoichi Matsuda, Kohei Uosaki

    Journal of Physical Chemistry C   127 ( 27 )   12867 - 12873   2023.7

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acs.jpcc.3c02131

    Scopus

    researchmap

  • 3.第一原理計算を基軸とした高イオン伝導度固体電解質のハイスループット探索と記述子抽出

    Yoshitaka TATEYAMA, Seong-Hoon JANG, Randy JALEM

    Denki Kagaku   91 ( 2 )   150 - 154   2023.6

     More details

    Publishing type:Research paper (scientific journal)   Publisher:The Electrochemical Society of Japan  

    DOI: 10.5796/denkikagaku.23-fe0012

    researchmap

  • Toward Improved Anodic Stability of Ether-Based Electrolytes for Rechargeable Magnesium Batteries

    Toshihiko Mandai, Masaru Yao, Keitaro Sodeyama, Akiko Kagatsume, Yoshitaka Tateyama, Hiroaki Imai

    The Journal of Physical Chemistry C   127 ( 22 )   10419 - 10433   2023.5

     More details

    Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society (ACS)  

    DOI: 10.1021/acs.jpcc.3c01452

    researchmap

  • Lithium Ion Transport Environment by Molecular Vibrations in Ion‐Conducting Glasses

    Hiroki Yamada, Koji Ohara, Satoshi Hiroi, Atsushi Sakuda, Kazutaka Ikeda, Takahiro Ohkubo, Kengo Nakada, Hirofumi Tsukasaki, Hiroshi Nakajima, Laszlo Temleitner, Laszlo Pusztai, Shunsuke Ariga, Aoto Matsuo, Jiong Ding, Takumi Nakano, Takuya Kimura, Ryo Kobayashi, Takeshi Usuki, Shuta Tahara, Koji Amezawa, Yoshitaka Tateyama, Shigeo Mori, Akitoshi Hayashi

    ENERGY & ENVIRONMENTAL MATERIALS   2023.3

     More details

    Publishing type:Research paper (scientific journal)   Publisher:Wiley  

    DOI: 10.1002/eem2.12612

    researchmap

  • Microwave assisted preparation of LiFePO4/C coated LiMn1.6Ni0.4O4 for Li-ion batteries with superior electrochemical properties Reviewed

    F.A. Vásquez, N.C. Rosero-Navarro, R. Jalem, A. Miura, Y. Goto, Y. Tateyama, J.A. Calderón, K. Tadanaga

    Applied Materials Today   30   101697 - 101697   2023.2

     More details

    Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.apmt.2022.101697

    researchmap

  • Nonequilibrium molecular dynamics for accelerated computation of ion–ion correlated conductivity beyond Nernst–Einstein limitation

    Sasaki, R., Gao, B., Hitosugi, T., Tateyama, Y.

    npj Computational Materials   9 ( 1 )   2023

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1038/s41524-023-00996-8

    Scopus

    researchmap

  • Evaluation of battery positive-electrode performance with simultaneous ab-initio calculations of both electronic and ionic conductivities

    Luong, H.D., Xu, C., Jalem, R., Tateyama, Y.

    Journal of Power Sources   569   2023

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.jpowsour.2023.232969

    Scopus

    researchmap

  • Multiobjective Solid Electrolyte Design of Tetragonal and Cubic Inverse-Perovskites for All-Solid-State Lithium-Ion Batteries by High-Throughput Density Functional Theory Calculations and AI-Driven Methods

    Jalem, R., Tateyama, Y., Takada, K., Jang, S.-H.

    Journal of Physical Chemistry C   127 ( 35 )   2023

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acs.jpcc.3c02801

    Scopus

    researchmap

  • Lithium dynamics at grain boundaries of β-Li3PS4 solid electrolyte

    Jalem, R., Chandrappa, M.L.H., Qi, J., Tateyama, Y., Ong, S.P.

    Energy Advances   2 ( 12 )   2023

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/d3ya00234a

    Scopus

    researchmap

  • First-Principles Study on the Interplay of Strain and State-of-Charge with Li-Ion Diffusion in the Battery Cathode Material LiCoO2

    Zhou, Z., Cazorla, C., Gao, B., Luong, H.D., Momma, T., Tateyama, Y.

    ACS Applied Materials and Interfaces   15 ( 46 )   2023

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acsami.3c14444

    Scopus

    researchmap

  • EwaldSolidSolution: A High-Throughput Application to Quickly Sample Stable Site Arrangements for Ionic Solid Solutions

    Jang, S.-H., Jalem, R., Tateyama, Y.

    Journal of Physical Chemistry A   127 ( 27 )   2023

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acs.jpca.3c00076

    Scopus

    researchmap

  • High-Throughput Data-Driven Prediction of Stable High-Performance Na-Ion Sulfide Solid Electrolytes (vol 32, 2206036, 2022)

    Seong-Hoon Jang, Yoshitaka Tateyama, Randy Jalem

    ADVANCED FUNCTIONAL MATERIALS   32 ( 51 )   2022.12

     More details

  • Crystal Structure-Controlled Electrocatalysis on Iron-Based Oxides Toward Oxygen Evolution in Alkaline Media: Trend and Mechanism

    Yuuki Sugawara, Keigo Kamata, Satomi Ueno, Atsushi Ishikawa, Eri Hayashi, Mitsuru Itoh, Yosuke Hamasaki, Yoshitaka Tateyama, Takeo Yamaguchi

    ECS Meeting Abstracts   2022.10

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1149/MA2022-02441689mtgabs

    researchmap

  • Favorable Role of the Metal-Support Perimeter Region in Electrochemical NH3Synthesis: A Density Functional Theory Study on Ru/BaCeO3

    Ishikawa, A., Murase, F., Tateyama, Y., Otomo, J.

    ACS Omega   7 ( 30 )   2022.8

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acsomega.2c01222

    Scopus

    researchmap

  • Tuning the Electronic, Ion Transport, and Stability Properties of Li-rich Manganese-based Oxide Materials with Oxide Perovskite Coatings: A First-Principles Computational Study

    Zizhen Zhou, Dewei Chu, Bo Gao, Toshiyuki Momma, Yoshitaka Tateyama, Claudio Cazorla

    ACS APPLIED MATERIALS & INTERFACES   14 ( 32 )   37009 - 37018   2022.8

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acsami.2c0756037009

    Web of Science

    researchmap

  • Atomistic insight into the dopant impacts at the garnet Li7La3Zr2O12 solid electrolyte grain boundaries

    Bo Gao, Randy Jalem, Yoshitaka Tateyama

    JOURNAL OF MATERIALS CHEMISTRY A   10 ( 18 )   10083 - 10091   2022.5

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/d2ta00545j

    Web of Science

    researchmap

  • Theoretical study on stability and ion transport property with halide doping of Na3SbS4 electrolyte for all-solid-state batteries

    Randy Jalem, Bo Gao, Hong-Kang Tian, Yoshitaka Tateyama

    JOURNAL OF MATERIALS CHEMISTRY A   10 ( 5 )   2235 - 2248   2022.2

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/d1ta07292g

    Web of Science

    researchmap

  • On‐Surface Synthesis of Porphyrin‐Complex Multi‐Block Co‐Oligomers by Defluorinative Coupling

    Shigeki Kawai, Atsushi Ishikawa, Shin‐ichiro Ishida, Takuya Yamakado, Yujing Ma, Kewei Sun, Yoshitaka Tateyama, Rémy Pawlak, Ernst Meyer, Shohei Saito, Atsuhiro Osuka

    Angewandte Chemie International Edition   61 ( 3 )   2022.1

     More details

    Publishing type:Research paper (scientific journal)   Publisher:Wiley  

    DOI: 10.1002/anie.202114697

    researchmap

    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1002/anie.202114697

  • STEM-EELS Spectrum Imaging of an Aerosol-Deposited NASICON-Type LATP Solid Electrolyte and LCO Cathode Interface

    Shunsuke Muto, Yuta Yamamoto, Miyuki Sakakura, Hong-Kang Tian, Yoshitaka Tateyama, Yasutoshi Iriyama

    ACS APPLIED ENERGY MATERIALS   5 ( 1 )   98 - 107   2022.1

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acsaem.1c02512

    Web of Science

    researchmap

  • Computational Aspects of Surface and Interface of BDD Electrode

    Tateyama, Y., Futera, Z., Ootani, Y., Iizuka, S., Anh, L.T.

    Diamond Electrodes: Fundamentals and Applications   2022

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/978-981-16-7834-9_5

    Scopus

    researchmap

  • Nanometer-size Na cluster formation in micropore of hard carbon as origin of higher-capacity Na-ion battery

    Yong Youn, Bo Gao, Azusa Kamiyama, Kei Kubota, Shinichi Komaba, Yoshitaka Tateyama

    npj Computational Materials   7 ( 1 )   2021.12

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Nature Research  

    DOI: 10.1038/s41524-021-00515-7

    Scopus

    researchmap

  • High-Pressure Synthesis and Lithium-Ion Conduction of Li4OBr2 Derivatives with a Layered Inverse-Perovskite Structure

    Shogo Wakazaki, Qiumin Liu, Randy Jalem, Takumi Nishikubo, Yuki Sakai, Naoki Matsui, Guowei Zhao, Kota Suzuki, Kei Shigematsu, Takafumi Yamamoto, Ryoji Kanno, Hena Das, Yoshitaka Tateyama, Masaki Azuma

    CHEMISTRY OF MATERIALS   33 ( 23 )   9194 - 9201   2021.12

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acs.chemmater.1c02713

    Web of Science

    researchmap

  • Computational Investigation on the Role of Aliovalent Cation Dopants to the Na+ Ion Superionic Conductivity of Na3SbS4 Solid Electrolytes By Density Functional Theory Methods

    Randy Jalem, Yoshitaka Tateyama

    ECS Meeting Abstracts   2021.10

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1149/MA2021-023257mtgabs

    researchmap

  • Remarkable electrochemical and ion-transport characteristics of magnesium-fluorinated alkoxyaluminate-diglyme electrolytes for magnesium batteries

    Toshihiko Mandai, Yong Youn, Yoshitaka Tateyama

    Materials Advances   2 ( 19 )   6283 - 6296   2021.10

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Royal Society of Chemistry  

    DOI: 10.1039/d1ma00448d

    Scopus

    researchmap

  • Mixed-Salt Enhanced Chemical Vapor Deposition of Two-Dimensional Transition Metal Dichalcogenides

    Shisheng Li, Yung-Chang Lin, Jinhua Hong, Bo Gao, Hong En Lim, Xu Yang, Song Liu, Yoshitaka Tateyama, Kazuhito Tsukagoshi, Yoshiki Sakuma, Kazu Suenaga, Takaaki Taniguchi

    Chemistry of Materials   2021.9

     More details

    Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society (ACS)  

    DOI: 10.1021/acs.chemmater.1c01652

    researchmap

  • Localized Graphitization on Diamond Surface as a Manifestation of Dopants

    Francesca Celine I. Catalan, Le The Anh, Junepyo Oh, Emiko Kazuma, Norihiko Hayazawa, Norihito Ikemiya, Naoki Kamoshida, Yoshitaka Tateyama, Yasuaki Einaga, Yousoo Kim

    Advanced Materials   2103250 - 2103250   2021.9

     More details

    Publishing type:Research paper (scientific journal)   Publisher:Wiley  

    DOI: 10.1002/adma.202103250

    researchmap

    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1002/adma.202103250

  • First-Principles DFT Study on Inverse Ruddlesden-Popper Tetragonal Compounds as Solid Electrolytes for All-Solid-State Li+-Ion Batteries

    Randy Jalem, Yoshitaka Tateyama, Kazunori Takada, Masanobu Nakayama

    CHEMISTRY OF MATERIALS   33 ( 15 )   5859 - 5871   2021.8

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acs.chemmater.1c00124

    Web of Science

    researchmap

  • Boron position-dependent surface reconstruction and electronic states of a boron-doped diamond(111) surfaces: an ab initio study

    Le The Anh, Francesca Celine Catalan, Yousoo Kim, Yasuaki Einaga, Yoshitaka Tateyama

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS   23 ( 29 )   15628 - 15634   2021.8

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/d1cp00689d

    Web of Science

    researchmap

  • Tuning the performance of a Mg negative electrode through grain boundaries and alloying toward the realization of Mg batteries

    Hong-Kang Tian, Randy Jalem, Masaki Matsui, Toshihiko Mandai, Hidetoshi Somekawa, Yoshitaka Tateyama

    JOURNAL OF MATERIALS CHEMISTRY A   9 ( 27 )   15207 - 15216   2021.7

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/d1ta02419a

    Web of Science

    researchmap

  • Peculiarly fast Li-ion conduction mechanism in a succinonitrile-based molecular crystal electrolyte: a molecular dynamics study

    Ryoma Sasaki, Makoto Moriya, Yuki Watanabe, Kazunori Nishio, Taro Hitosugi, Yoshitaka Tateyama

    JOURNAL OF MATERIALS CHEMISTRY A   9 ( 26 )   14897 - 14903   2021.7

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/d1ta02809j

    Web of Science

    researchmap

  • Revealing Atomic-Scale Ionic Stability and Transport around Grain Boundaries of Garnet Li7La3Zr2O12 Solid Electrolyte

    Bo Gao, Randy Jalem, Hong-Kang Tian, Yoshitaka Tateyama

    Advanced Energy Materials   12 ( 3 )   2021.5

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.21203/rs.3.rs-530094/v1

    Scopus

    researchmap

  • Tunable Doping of Rhenium and Vanadium into Transition Metal Dichalcogenides for Two‐Dimensional Electronics

    Shisheng Li, Jinhua Hong, Bo Gao, Yung‐Chang Lin, Hong En Lim, Xueyi Lu, Jing Wu, Song Liu, Yoshitaka Tateyama, Yoshiki Sakuma, Kazuhito Tsukagoshi, Kazu Suenaga, Takaaki Taniguchi

    Advanced Science   2004438 - 2004438   2021.4

     More details

    Publishing type:Research paper (scientific journal)   Publisher:Wiley  

    DOI: 10.1002/advs.202004438

    researchmap

    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1002/advs.202004438

  • Efficient Oxygen Evolution Electrocatalysis on CaFe2O4 and Its Reaction Mechanism

    Yuuki Sugawara, Keigo Kamata, Atsushi Ishikawa, Yoshitaka Tateyama, Takeo Yamaguchi

    ACS APPLIED ENERGY MATERIALS   4 ( 4 )   3057 - 3066   2021.4

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acsaem.0c02710

    Web of Science

    researchmap

  • Kinetic Control of the Li0.9Mn1.6Ni0.4O4 Spinel Structure with Enhanced Electrochemical Performance

    F. A. Vásquez, N. C. Rosero-Navarro, A. Miura, R. Jalem, Y. Goto, M. Nagao, Y. Tateyama, K. Tadanaga, J. A. Calderón

    ACS Applied Materials & Interfaces   13 ( 12 )   14056 - 14067   2021.3

     More details

    Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society (ACS)  

    DOI: 10.1021/acsami.0c17886

    researchmap

  • A First-Principles Microkinetics for Homogeneous-Heterogeneous Reactions: Application to Oxidative Coupling of Methane Catalyzed by Magnesium Oxide

    Ishikawa, A., Tateyama, Y.

    ACS Catalysis   11 ( 5 )   2691 - 2700   2021.3

     More details

    Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society ({ACS})  

    DOI: 10.1021/acscatal.0c04104

    Scopus

    researchmap

  • MgO-Template Synthesis of Extremely High Capacity Hard Carbon for Na-Ion Battery

    Azusa Kamiyama, Kei Kubota, Daisuke Igarashi, Yong Youn, Yoshitaka Tateyama, Hideka Ando, Kazuma Gotoh, Shinichi Komaba

    Angewandte Chemie - International Edition   60 ( 10 )   5114 - 5120   2021.3

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/anie.202013951

    Scopus

    PubMed

    researchmap

  • Chemical stability of Li4PS4I solid electrolyte against hydrolysis

    Marcela Calpa, Nataly Carolina Rosero-Navarro, Akira Miura, Randy Jalem, Yoshitaka Tateyama, Kiyoharu Tadanaga

    Applied Materials Today   22   100918 - 100918   2021.3

     More details

    Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.apmt.2020.100918

    researchmap

  • First-Principles Study of Microscopic Electrochemistry at the LiCoO2 Cathode/LiNbO3 Coating/beta-Li3PS4 Solid Electrolyte Interfaces in an All-Solid-State Battery

    Bo Gao, Randy Jalem, Yoshitaka Tateyama

    ACS APPLIED MATERIALS & INTERFACES   13 ( 10 )   11765 - 11773   2021.3

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acsami.0c19091

    Web of Science

    researchmap

  • Hybrid Functional Study of H-Abstraction from Methane by Li-Doped, Pristine and Stepped MgO(100) and MgO(110) Surfaces Reviewed

    Ishikawa, A., Tateyama, Y.

    Catalysis Letters   151 ( 3 )   627 - 633   2021

     More details

    Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media {LLC}  

    DOI: 10.1007/s10562-020-03358-x

    Scopus

    researchmap

  • Effect of Interaction among Magnesium Ions, Anion, and Solvent on Kinetics of the Magnesium Deposition Process

    Feilure Tuerxun, Kentaro Yamamoto, Toshihiko Mandai, Yoshitaka Tateyama, Koji Nakanishi, Tomoki Uchiyama, Toshiki Watanabe, Yusuke Tamenori, Kiyoshi Kanamura, Yoshiharu Uchimoto

    JOURNAL OF PHYSICAL CHEMISTRY C   124 ( 52 )   28510 - 28519   2020.12

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acs.jpcc.0c08268

    Web of Science

    researchmap

  • Electron and Ion Transfer across Interfaces of the NASICON-Type LATP Solid Electrolyte with Electrodes in All-Solid-State Batteries: A Density Functional Theory Study via an Explicit Interface Model

    Hong-Kang Tian, Randy Jalem, Bo Gao, Yuta Yamamoto, Shunsuke Muto, Miyuki Sakakura, Yasutoshi Iriyama, Yoshitaka Tateyama

    ACS APPLIED MATERIALS & INTERFACES   12 ( 49 )   54752 - 54762   2020.12

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acsami.0c16463

    Web of Science

    researchmap

  • Ultrahigh Electrocatalytic Activity of an Iron-Based Bimetallic Oxide for Oxygen Evolution Reaction in Alkaline

    Yuuki Sugawara, Keigo Kamata, Atsushi Ishikawa, Yoshitaka Tateyama, Takeo Yamaguchi

    ECS Meeting Abstracts   2020.11

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1149/MA2020-02382419mtgabs

    researchmap

  • Comparative study on sulfide and oxide electrolyte interfaces with cathodes in all-solid-state battery via first-principles calculations

    Yukihiro Okuno, Jun Haruyama, Yoshitaka Tateyama

    ACS Applied Energy Materials   3 ( 11 )   11061 - 11072   2020.11

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society  

    DOI: 10.1021/acsaem.0c02033

    Scopus

    researchmap

  • Critical Issues of Fluorinated Alkoxyborate-Based Electrolytes in Magnesium Battery Applications

    Toshihiko Mandai, Yoshitaka Tateyama, Atsushi Ishikawa

    ECS Meeting Abstracts   2020.11

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1149/MA2020-024864mtgabs

    researchmap

  • (Invited) Theoretical Analysis of Microscopic Interface Ionics at Heterogeneous Solid-Solid Interfaces in Batteries

    Yoshitaka Tateyama

    ECS Meeting Abstracts   2020.11

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1149/MA2020-025955mtgabs

    researchmap

  • Electron and Ion Modulation at the Nasicon Solid-Electrolyte/Electrode Interfaces at Static and Operating Conditions in All-Solid-State Batteries: A DFT Study

    Hong-Kang Tian, Yoshitaka Tateyama, Randy Jalem, Bo Gao

    ECS Meeting Abstracts   2020.11

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1149/MA2020-025973mtgabs

    researchmap

  • First-Principles Calculation Study of Na+Superionic Conduction Mechanism in W- And Mo-Doped Na<inf>3</inf>SbS<inf>4</inf>Solid Electrolytes

    Randy Jalem, Akitoshi Hayashi, Fumika Tsuji, Atsushi Sakuda, Yoshitaka Tateyama

    Chemistry of Materials   32 ( 19 )   8373 - 8381   2020.10

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acs.chemmater.0c02318

    Scopus

    researchmap

  • First-Principles Study on the Cation-Dependent Electrochemical Stabilities in Li/Na/K Hydrate-Melt Electrolytes

    Kasumi Miyazaki, Norio Takenaka, Eriko Watanabe, Yuki Yamada, Yoshitaka Tateyama, Atsuo Yamada

    ACS APPLIED MATERIALS & INTERFACES   12 ( 38 )   42734 - 42738   2020.9

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acsami.0c10472

    Web of Science

    researchmap

  • Significant Reduction in the Interfacial Resistance of Garnet-Type Solid Electrolyte and Lithium Metal by a Thick Amorphous Lithium Silicate Layer

    Nataly Carolina Rosero-Navarro, Ryunosuke Kajiura, Randy Jalem, Yoshitaka Tateyama, Akira Miura, Kiyoharu Tadanaga

    ACS Applied Energy Materials   3 ( 6 )   5533 - 5541   2020.6

     More details

    Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society (ACS)  

    DOI: 10.1021/acsaem.0c00511

    researchmap

  • Determining Factor on the Polarization Behavior of Magnesium Deposition for Magnesium Battery Anode Reviewed

    Feilure Tuerxun, Kentaro Yamamoto, Masashi Hattori, Toshihiko Mandai, Koji Nakanishi, Ashu Choudhary, Yoshitaka Tateyama, Keitaro Sodeyama, Aiko Nakao, Tomoki Uchiyama, Masaki Matsui, Kazuki Tsuruta, Yusuke Tamenori, Kiyoshi Kanamura, Yoshiharu Uchimoto

    ACS APPLIED MATERIALS & INTERFACES   12 ( 23 )   25775 - 25785   2020.6

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acsami.0c03696

    Web of Science

    Scopus

    PubMed

    researchmap

  • Li-ion transport at the interface between a graphite anode and Li2CO3 solid electrolyte interphase:: Ab initio molecular dynamics study

    Takeshi Baba, Keitaro Sodeyama, Yoshiumi Kawamura, Yoshitaka Tateyama

    Physical Chemistry Chemical Physics   22 ( 19 )   10764 - 10774   2020.5

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Royal Society of Chemistry  

    DOI: 10.1039/c9cp06608j

    Scopus

    PubMed

    researchmap

  • Surface-Dependent Stability of the Interface between Garnet Li7La3Zr2O12 and the Li Metal in the All-Solid-State Battery from First-Principles Calculations Reviewed

    Gao, B., Jalem, R., Tateyama, Y.

    ACS Applied Materials and Interfaces   12 ( 14 )   16350 - 16358   2020.4

     More details

    Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society ({ACS})  

    DOI: 10.1021/acsami.9b23019

    Scopus

    researchmap

  • What Is the Active Site for the Oxidative Coupling of Methane Catalyzed by MgO? A Metadynamics-Biased Ab Initio Molecular Dynamics Study Reviewed

    Atsushi Ishikawa, Yoshitaka Tateyama

    The Journal of Physical Chemistry C   124 ( 11 )   6054 - 6062   2020.3

     More details

    Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society ({ACS})  

    DOI: 10.1021/acs.jpcc.9b09959

    researchmap

  • Possible high-potential ilmenite type Na1MO3 (M = V-Ni) cathodes realized by dominant oxygen redox reaction

    M. H. N. Assadi, Masashi Okubo, Atsuo Yamada, Yoshitaka Tateyama

    PHYSICAL REVIEW MATERIALS   4 ( 1 )   2020.1

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevMaterials.4.015401

    Web of Science

    researchmap

  • Li+ Transport Mechanism at the Heterogeneous Cathode/Solid Electrolyte Interface in an All-Solid-State Battery via the First-Principles Structure Prediction Scheme Reviewed

    Gao, B., Jalem, R., Ma, Y., Tateyama, Y.

    Chemistry of Materials   32 ( 1 )   85 - 96   2020

     More details

    Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society ({ACS})  

    DOI: 10.1021/acs.chemmater.9b02311

    Scopus

    researchmap

  • On principal features of organic electrolyte molecules in lithium ion battery performance

    Takao Tsuneda, Yoshitaka Tateyama

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS   21 ( 41 )   22990 - 22998   2019.11

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/c9cp03980e

    Web of Science

    researchmap

  • Theoretical picture of positive electrode-solid electrolyte interface in all-solid-state battery from electrochemistry and semiconductor physics viewpoints

    Yoshitaka Tateyama, Bo Gao, Randy Jalem, Jun Haruyama

    CURRENT OPINION IN ELECTROCHEMISTRY   17   149 - 157   2019.10

     More details

  • First-Principles Study on the Peculiar Water Environment in a Hydrate-Melt Electrolyte Reviewed

    Kasumi Miyazaki, Norio Takenaka, Eriko Watanabe, Shota Iizuka, Yuki Yamada, Yoshitaka Tateyama, Atsuo Yamada

    JOURNAL OF PHYSICAL CHEMISTRY LETTERS   10 ( 20 )   6301 - 6305   2019.10

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acs.jpclett.9b02207

    Web of Science

    researchmap

  • Electrochemical properties of fluorinated boron-doped diamond electrodes via fluorine-containing plasma treatment

    Chizu Yamaguchi, Keisuke Natsui, Shota Iizuka, Yoshitaka Tateyama, Yasuaki Einaga

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS   21 ( 25 )   13788 - 13794   2019.7

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/c8cp07402j

    Web of Science

    researchmap

  • Modifications in coordination structure of Mg[TFSA](2)-based supporting salts for high-voltage magnesium rechargeable batteries

    Toshihiko Mandai, Kenji Tatesaka, Kenya Soh, Hyuma Masu, Ashu Choudhary, Yoshitaka Tateyama, Ryuta Ise, Hiroaki Imai, Tatsuya Takeguchi, Kiyoshi Kanamura

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS   21 ( 23 )   12100 - 12111   2019.6

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/c9cp01400d

    Web of Science

    researchmap

  • Interfacial Behavior of Magnesium Ions at Electrode/Electrolyte Interface during Magnesium Deposition Reaction Reviewed

    Feilure Tuerxun, Masashi Hattori, Kentaro Yamamoto, Toshihiko Mandai, Masaki Matsui, Yoshitaka Tateyama, Tomoki Uchiyama, Tatsuya Takeguchi, Kiyoshi Kanamura, Yoshiharu Uchimoto

    ECS Meeting Abstracts   {MA}2019-01 ( 2 )   388 - 388   2019.5

     More details

    Publishing type:Research paper (scientific journal)   Publisher:The Electrochemical Society  

    DOI: 10.1149/MA2019-01/2/388

    researchmap

  • Combined Theoretical and Experimental Studies of Sodium Battery Materials Reviewed

    Eriko Watanabe, Sai-Cheong Chung, Shin-ichi Nishimura, Yuki Yamada, Masashi Okubo, Keitaro Sodeyama, Yoshitaka Tateyama, Atsuo Yamada

    CHEMICAL RECORD   19 ( 4 )   792 - 798   2019.4

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/tcr.201800125

    Web of Science

    researchmap

  • Reaction energy benchmarks of hydrocarbon combustion by Gaussian basis and plane wave basis approaches Reviewed

    Ishikawa, A., Tateyama, Y.

    Journal of Computational Chemistry   40 ( 20 )   1866   2019.4

     More details

    Publishing type:Research paper (scientific journal)   Publisher:Wiley  

    DOI: 10.1002/jcc.25838

    Scopus

    researchmap

  • Influence of Surface Orientation on Electrochemical Properties of Boron-Doped Diamond Reviewed

    Ivandini Tribidasari A, Watanabe Takeshi, Matsui Takahiro, Ootani Yusuke, Iizuka Shota, Toyoshima Ryo, Kodama Hideki, Kondoh Hiroshi, Tateyama Yoshitaka, Einaga Yasuaki

    JOURNAL OF PHYSICAL CHEMISTRY C   123 ( 9 )   5336 - 5344   2019.3

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acs.jpcc.8b10406

    Web of Science

    researchmap

  • Computational Study on Possible High Potential Ilmenite Type Na1TMO3 (TM=3d, 4d Transition Metals) Cathodes Based on Oxygen Redox Reaction

    M. H. N. Assadi, Masashi Okubo, Atsuo Yamada, Yoshitaka Tateyama

    ECS Meeting Abstracts   2019.2

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1149/MA2019-03/2/261

    researchmap

  • Oxygen Redox Promoted by Na Excess and Covalency in Hexagonal and Monoclinic Na2-xRuO3 Polymorphs Reviewed

    Assadi, M. H. N, Okubo, Masashi, Yamada, Atsuo, Tateyama, Yoshitaka

    JOURNAL OF THE ELECTROCHEMICAL SOCIETY   166 ( 3 )   A5343 - A5348   2019.1

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1149/2.0521903jes

    Web of Science

    researchmap

  • Structures, Electronic States, and Reactions at Interfaces between LiNi0.5Mn1.5O4 Cathode and Ethylene Carbonate Electrolyte: A First-Principles Study Reviewed

    Yukihiro Okuno, Keisuke Ushirogata, Keitaro Sodeyama, Ganes Shukri, Yoshitaka Tateyama

    JOURNAL OF PHYSICAL CHEMISTRY C   123 ( 4 )   2267 - 2277   2019.1

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acs.jpcc.8b10625

    Web of Science

    researchmap

  • In-Situ Spectroscopic Study on the Surface Hydroxylation of Diamond Electrodes Reviewed

    Seiji Kasahara, Taiga Ogose, Norihito Ikemiya, Takashi Yamamoto, Keisuke Natsui, Yasuyuki Yokota, Raymond A Wong, Shota Iizuka, Nagahiro Hoshi, Yoshitaka Tateyama, Yousoo Kim, Masashi Nakamura, Yasuaki Einaga

    Anal. Chem.   91 ( 8 )   4980 - 4986   2019

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society (ACS)  

    DOI: 10.1021/acs.analchem.8b03834

    researchmap

  • Lithium-salt monohydrate melt: A stable electrolyte for aqueous lithium-ion batteries Reviewed

    Ko, S., Yamada, Y., Miyazaki, K., Shimada, T., Watanabe, E., Tateyama, Y., Kamiya, T., Honda, T., Akikusa, J., Yamada, A.

    Electrochemistry Communications   104   106488   2019

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.elecom.2019.106488

    Scopus

    researchmap

  • Machine learning prediction of coordination energies for alkali group elements in battery electrolyte solvents

    Atsushi Ishikawa, Keitaro Sodeyama, Yasuhiko Igarashi, Tomofumi Nakayama, Yoshitaka Tateyama, Masato Okada

    Physical Chemistry Chemical Physics   21 ( 48 )   26399 - 26405   2019

     More details

    Publishing type:Research paper (scientific journal)   Publisher:Royal Society of Chemistry (RSC)  

    <p>Coordination energy of five ion species to 70 electrolyte solvents are predicted by machine learning combined with first-principle calculation.</p>

    DOI: 10.1039/c9cp03679b

    researchmap

  • A general representation scheme for crystalline solids based on Voronoi-tessellation real feature values and atomic property data Reviewed

    Randy Jalem, Masanobu Nakayama, Yusuke Noda, Tam Le, Ichiro Takeuchi, Yoshitaka Tateyama, Hisatsugu Yamazaki

    Science and Technology of Advanced Materials   19 ( 1 )   231 - 242   2018.12

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Taylor and Francis Ltd.  

    DOI: 10.1080/14686996.2018.1439253

    Scopus

    researchmap

  • Dynamical Solvent Effects on the Charge and Reactivity of Ceria-Supported Pt Nanoclusters

    Lucie Szabova, Matteo Farnesi Camellone, Fabio Negreiros Ribeiro, Vladimir Matolin, Yoshitaka Tateyama, Stefano Fabris

    JOURNAL OF PHYSICAL CHEMISTRY C   122 ( 48 )   27507 - 27515   2018.12

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acs.jpcc.8b09154

    Web of Science

    researchmap

  • Role of Coordination Structure of Magnesium Ions on Charge and Discharge Behavior of Magnesium Alloy Electrode Reviewed

    Masashi Hattori, Kentaro Yamamoto, Masaki Matsui, Koji Nakanishi, Toshihiko Mandai, Ashu Choudhary, Yoshitaka Tateyama, Keitaro Sodeyama, Tomoki Uchiyama, Yuki Orikasa, Yusuke Tamenori, Tatsuya Takeguchi, Kiyoshi Kanamura, Yoshiharu Uchimoto

    The Journal of Physical Chemistry C   122 ( 44 )   25204 - 25210   2018.10

     More details

    Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society ({ACS})  

    DOI: 10.1021/acs.jpcc.8b08558

    Scopus

    researchmap

  • Liquid electrolyte informatics using an exhaustive search with linear regression Reviewed

    Keitaro Sodeyama, Yasuhiko Igarashi, Tomofumi Nakayama, Yoshitaka Tateyama, Masato Okada

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS   20 ( 35 )   22585 - 22591   2018.9

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/c7cp08280k

    Web of Science

    researchmap

  • カー・パリネロ分子動力学(CPMD)ワークショップ Reviewed

    館山 佳尚

    固体物理   53 ( 7 )   401 - 406   2018.7

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)  

    researchmap

  • First-Principles Microkinetic Analysis of NO + CO Reactions on Rh(111) Surface toward Understanding NO x Reduction Pathways Reviewed

    Ishikawa, A., Tateyama, Y.

    Journal of Physical Chemistry C   122 ( 30 )   17378 - 17388   2018.7

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acs.jpcc.8b05906

    Scopus

    researchmap

  • Bulk Hydroxylation and Effective Water Splitting by Highly Reduced Cerium Oxide: The Role of O Vacancy Coordination Reviewed

    Filip Dvořák, Lucie Szabová, Viktor Johánek, Matteo Farnesi Camellone, Vitalii Stetsovych, Mykhailo Vorokhta, Andrii Tovt, Tomáš Skála, Iva Matolínová, Yoshitaka Tateyama, Josef Mysliveček, Stefano Fabris, Vladimír Matolín

    ACS Catalysis   8 ( 5 )   4354 - 4363   2018.5

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Chemical Society  

    DOI: 10.1021/acscatal.7b04409

    Scopus

    researchmap

  • ホウ素ドープダイヤモンド電極界面反応の理論計算 Invited Reviewed

    館山 佳尚

    NEW DIAMOND   34 ( 2 )   13 - 15   2018.4

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)  

    researchmap

  • Fire-extinguishing organic electrolytes for safe batteries Reviewed

    Jianhui Wang, Yuki Yamada, Keitaro Sodeyama, Eriko Watanabe, Koji Takada, Yoshitaka Tateyama, Atsuo Yamada

    Nature Energy   3 ( 1 )   22 - 29   2018.1

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Nature Publishing Group  

    DOI: 10.1038/s41560-017-0033-8

    Scopus

    researchmap

  • Oxygen redox in hexagonal layered Na: XTMO3 (TM = 4d elements) for high capacity Na ion batteries Reviewed

    M. H.N. Assadi, Masashi Okubo, Atsuo Yamada, Yoshitaka Tateyama

    Journal of Materials Chemistry A   6 ( 8 )   3747 - 3753   2018

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Royal Society of Chemistry  

    DOI: 10.1039/c7ta10826e

    Scopus

    researchmap

  • First-Principles Study of Electron Injection and Defects at the TiO2/CH3NH3PbI3 Interface of Perovskite Solar Cells Reviewed

    Jun Haruyama, Keitaro Sodeyama, Ikutaro Hamada, Liyuan Han, Yoshitaka Tateyama

    JOURNAL OF PHYSICAL CHEMISTRY LETTERS   8 ( 23 )   5840 - 5847   2017.12

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acs.jpclett.7b02622

    Web of Science

    researchmap

  • コラム CPMDおよびstat-CPMD Reviewed

    館山 佳尚

    固体物理   52 ( 621 )   616 - 616   2017.11

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)  

    researchmap

  • Surface Hydrogenation of Boron-Doped Diamond Electrodes by Cathodic Reduction Reviewed

    Seiji Kasahara, Keisuke Natsui, Takeshi Watanabe, Yasuyuki Yokota, Yousoo Kim, Shota Iizuka, Yoshitaka Tateyama, Yasuaki Einaga

    ANALYTICAL CHEMISTRY   89 ( 21 )   11341 - 11347   2017.11

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acs.analchem.7b02129

    Web of Science

    researchmap

  • 2次電池の固液界面・電解液反応の第一原理サンプリング解析 Invited Reviewed

    館山 佳尚, 袖山 慶太郎, 後瀉敬介, 奥野幸洋

    固体物理   52 ( 11 )   605 - 615   2017.11

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)  

    researchmap

  • Unusual Passivation Ability of Superconcentrated Electrolytes toward Hard Carbon Negative Electrodes in Sodium-Ion Batteries Reviewed

    Koji Takada, Yuki Yamada, Eriko Watanabe, Jianhui Wang, Keitaro Sodeyama, Yoshitaka Tateyama, Kazuhisa Hirata, Takeo Kawase, Atsuo Yamada

    ACS APPLIED MATERIALS & INTERFACES   9 ( 39 )   33802 - 33809   2017.10

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acsami.7b08414

    Web of Science

    researchmap

  • Atomic Structures and Electronic States at the surfaces and interfaces of CH3NH3PbI3 Perovskite

    Haruyama, J., Sodeyama, K., Tateyama, Y.

    Theoretical Modeling of Organohalide Perovskites for Photovoltaic Applications   165 - 182   2017.7

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.4324/9781315152424

    Scopus

    researchmap

  • Enhanced Li-Ion Accessibility in MXene Titanium Carbide by Steric Chloride Termination Reviewed

    Satoshi Kajiyama, Lucie Szabova, Hiroki Iinuma, Akira Sugahara, Kazuma Gotoh, Keitaro Sodeyama, Yoshitaka Tateyama, Masashi Okubo, Atsuo Yamada

    ADVANCED ENERGY MATERIALS   7 ( 9 )   1601873   2017.5

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/aenm.201601873

    Web of Science

    researchmap

  • Global search for low-lying crystal structures using the artificial force induced reaction method: A case study on carbon Reviewed

    Makito Takagi, Tetsuya Taketsugu, Hiori Kino, Yoshitaka Tateyama, Kiyoyuki Terakura, Satoshi Maeda

    PHYSICAL REVIEW B   95 ( 18 )   2017.5

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevB.95.184110

    Web of Science

    researchmap

  • Cation Mixing Properties toward Co Diffusion at the LiCoO2 Cathode/Sulfide Electrolyte Interface in a Solid-State Battery Reviewed

    Jun Haruyama, Keitaro Sodeyama, Yoshitaka Tateyama

    ACS APPLIED MATERIALS & INTERFACES   9 ( 1 )   286 - 292   2017.1

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acsami.6b08435

    Web of Science

    researchmap

  • The Solvation Structure of Lithium Ions in an Ether Based Electrolyte Solution from First-Principles Molecular Dynamics Reviewed

    Martin Callsen, Keitaro Sodeyama, Zdenek Futera, Yoshitaka Tateyama, Ikutaro Hamada

    JOURNAL OF PHYSICAL CHEMISTRY B   121 ( 1 )   180 - 188   2017.1

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acs.jpcb.6b09203

    Web of Science

    researchmap

  • First-principles molecular dynamics simulations of proton diffusion in cubic BaZrO 3 perovskite under strain conditions Reviewed

    Marco Fronzi, Yoshitaka Tateyama, Nicola Marzari, Michael Nolan, Enrico Traversa

    Materials for Renewable and Sustainable Energy   5 ( 4 )   2016.11

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Publisher:SpringerOpen  

    DOI: 10.1007/s40243-016-0078-9

    Scopus

    researchmap

  • A Study on Electrolytic Corrosion of Boron-Doped Diamond Electrodes when Decomposing Organic Compounds Reviewed

    Takeshi Kashiwada, Takeshi Watanabe, Yusuke Ootani, Yoshitaka Tateyama, Yasuaki Einaga

    ACS APPLIED MATERIALS & INTERFACES   8 ( 42 )   28299 - 28305   2016.10

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acsami.5b11638

    Web of Science

    researchmap

  • Catalytic Proton Dynamics at the Water/Solid Interface of Ceria-Supported Pt Clusters Reviewed

    Matteo Farnesi Camellone, Fabio Negreiros Ribeiro, Lucie Szabova, Yoshitaka Tateyama, Stefano Fabris

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   138 ( 36 )   11560 - 11567   2016.9

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/jacs.6b03446

    Web of Science

    researchmap

  • Hydrate-melt electrolytes for high-energy-density aqueous batteries Reviewed

    Yuki Yamada, Kenji Usui, Keitaro Sodeyama, Seongjae Ko, Yoshitaka Tateyama, Atsuo Yamada

    NATURE ENERGY   1 ( 10 )   2016.8

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1038/NENERGY.2016.129

    Web of Science

    researchmap

  • First-principles study on the cosensitization effects of Ru and squaraine dyes on a TiO2 surface Reviewed

    Yusuke Ootani, Keitaro Sodeyama, Liyuan Han, Yoshitaka Tateyama

    SURFACE SCIENCE   649   66 - 71   2016.7

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.susc.2016.01.025

    Web of Science

    researchmap

  • Superconcentrated electrolytes for a high-voltage lithium-ion battery Reviewed

    Jianhui Wang, Yuki Yamada, Keitaro Sodeyama, Ching Hua Chiang, Yoshitaka Tateyama, Atsuo Yamada

    NATURE COMMUNICATIONS   7 ( 1 )   2016.6

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1038/ncomms12032

    Web of Science

    researchmap

  • Life of superoxide in aprotic Li-O-2 battery electrolytes: simulated solvent and counter-ion effects Reviewed

    J. Scheers, D. Lidberg, K. Sodeyama, Z. Futera, Y. Tateyama

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS   18 ( 15 )   9961 - 9968   2016.4

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/c5cp08056h

    Web of Science

    researchmap

  • Sodium-Ion Intercalation Mechanism in MXene Nanosheets Reviewed

    Satoshi Kajiyama, Lucie Szabova, Keitaro Sodeyama, Hiroki Iinuma, Ryohei Morita, Kazuma Gotoh, Yoshitaka Tateyama, Masashi Okubo, Atsuo Yamada

    ACS NANO   10 ( 3 )   3334 - 3341   2016.3

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acsnano.5b06958

    Web of Science

    researchmap

  • Surface Properties of CH3NH3PbI3 for Perovskite Solar Cells Reviewed

    Jun Haruyama, Keitaro Sodeyama, Liyuan Han, Yoshitaka Tateyama

    ACCOUNTS OF CHEMICAL RESEARCH   49 ( 3 )   554 - 561   2016.3

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/acs.accounts.5b00452

    Web of Science

    researchmap

  • Decomposition of the fluoroethylene carbonate additive and the glue effect of lithium fluoride products for the solid electrolyte interphase: an ab initio study Reviewed

    Yukihiro Okuno, Keisuke Ushirogata, Keitaro Sodeyama, Yoshitaka Tateyama

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS   18 ( 12 )   8643 - 8653   2016.3

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/c5cp07583a

    Web of Science

    researchmap

  • First-Principles Study of Co Diffusion at LiCoO2/Sulfide Electrolyte Interfaces in All-Solid-State Li-Ion Batteries

    Haruyama Jun, Sodeyama Keitaro, Takada Kazunori, Tateyama Yoshitaka

    Meeting Abstracts of the Physical Society of Japan   71   2414 - 2414   2016

     More details

    Language:Japanese   Publisher:The Physical Society of Japan  

    DOI: 10.11316/jpsgaiyo.71.2.0_2414

    researchmap

  • 22aBH-13 First-Principles Study of Ion Diffusion Barrier in Photo-Absorbing Layer Materials for Perovskite Solar Cells

    Haruyama J., Sodeyama K., Han L., Tateyama Y.

    Meeting Abstracts of the Physical Society of Japan   71   1635 - 1635   2016

     More details

    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

    DOI: 10.11316/jpsgaiyo.71.1.0_1635

    CiNii Books

    researchmap

  • Verification of adiabatic-state mixing throughout the Ehrenfest dynamics using TDDFT

    Miyamoto Yoshiyuki, Tateyama Yoshitaka

    Meeting Abstracts of the Physical Society of Japan   71   2679 - 2679   2016

     More details

    Language:Japanese   Publisher:The Physical Society of Japan  

    DOI: 10.11316/jpsgaiyo.71.2.0_2679

    researchmap

  • Conservation of the pure adiabatic state in Ehrenfest dynamics of the photoisomerization of molecules Reviewed

    Yoshiyuki Miyamoto, Yoshitaka Tateyama, Norihisa Oyama, Takahisa Ohno

    SCIENTIFIC REPORTS   5   18220-1 - 18220-9   2015.12

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1038/srep18220

    Web of Science

    researchmap

  • Corrosion Prevention Mechanism of Aluminum Metal in Superconcentrated Electrolytes Reviewed

    Yuki Yamada, Ching Hua Chiang, Keitaro Sodeyama, Jianhui Wang, Yoshitaka Tateyama, Atsuo Yamada

    CHEMELECTROCHEM   2 ( 11 )   1687 - 1694   2015.11

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/celc.201500235

    Web of Science

    researchmap

  • Cover Picture: Corrosion Prevention Mechanism of Aluminum Metal in Superconcentrated Electrolytes (ChemElectroChem 11/2015) Reviewed

    Yuki Yamada, Ching Hua Chiang, Keitaro Sodeyama, Jianhui Wang, Yoshitaka Tateyama, Atsuo Yamada

    ChemElectroChem   2 ( 11 )   1625   2015.10

     More details

    Publisher:Wiley  

    DOI: 10.1002/celc.201500427

    researchmap

  • Investigating crystalline-polarity-dependent electronic structures of GaN by hard x-ray photoemission and ab-initio calculations Reviewed

    Takeo Ohsawa, Shigenori Ueda, Motohiro Suzuki, Yoshitaka Tateyama, Jesse R. Williams, Naoki Ohashi

    APPLIED PHYSICS LETTERS   107 ( 17 )   171604   2015.10

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/1.4934842

    Web of Science

    researchmap

  • First-Principles Study of Ion Diffusion in Perovskite Solar Cell Sensitizers Reviewed

    Jun Haruyama, Keitaro Sodeyama, Liyuan Han, Yoshitaka Tateyama

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   137 ( 32 )   10048 - 10051   2015.8

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/jacs.5b03615

    Web of Science

    researchmap

  • Recent Progress in Interfacial Nanoarchitectonics in Solid-State Batteries Reviewed

    Kazunori Takada, Narumi Ohta, Yoshitaka Tateyama

    JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS   25 ( 2 )   205 - 213   2015.3

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/s10904-014-0127-8

    Web of Science

    researchmap

  • Water Adsorption and Dissociation at Metal-Supported Ceria Thin Films: Thickness and Interface-Proximity Effects Studied with DFT plus U Calculations Reviewed

    Lucie Szabova, Yoshitaka Tateyama, Vladimir Matolin, Stefano Fabris

    JOURNAL OF PHYSICAL CHEMISTRY C   119 ( 5 )   2537 - 2544   2015.2

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/jp5109152

    Web of Science

    researchmap

  • Possibility of NCS Group Anchor for Ru Dye Adsorption to Anatase TiO2(101) Surface: A Density Functional Theory Investigation Reviewed

    Yusuke Ootani, Keitaro Sodeyama, Liyuan Han, Yoshitaka Tateyama

    JOURNAL OF PHYSICAL CHEMISTRY C   119 ( 1 )   234 - 241   2015.1

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/jp5075434

    Web of Science

    researchmap

  • Stable Surface Structures and Electronic Properties on Methylammonium Lead Iodide for Perovskite Solar Cell Sensitizer

    Haruyama Jun, Sodeyama Keitaro, Han Liyuan, Tateyama Yoshitaka

    Abstract of annual meeting of the Surface Science of Japan   35   228 - 228   2015

     More details

    Publisher:The Surface Science Society of Japan  

    DOI: 10.14886/sssj2008.35.0_228

    researchmap

  • 22aAB-10 Stable Structures and Electronic Properties on Methylammonium Lead Iodide Surfaces for Perovskite Solar Cells

    Haruyama J., Sodeyama K., Han L., Tateyama Y.

    Meeting Abstracts of the Physical Society of Japan   70   2591 - 2591   2015

     More details

    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

    DOI: 10.11316/jpsgaiyo.70.1.0_2591

    CiNii Books

    researchmap

  • Near-Shore Aggregation Mechanism of Electrolyte Decomposition Products to Explain Solid Electrolyte Interphase Formation Reviewed

    Keisuke Ushirogata, Keitaro Sodeyama, Zdenek Futera, Yoshitaka Tateyama, Yukihiro Okunoa

    JOURNAL OF THE ELECTROCHEMICAL SOCIETY   162 ( 14 )   A2670 - A2678   2015

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1149/2.0301514jes

    Web of Science

    researchmap

  • A method to calculate redox potentials relative to the normal hydrogen electrode in nonaqueous solution by using density functional theory-based molecular dynamics Reviewed

    Ryota Jono, Yoshitaka Tateyama, Koichi Yamashita

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS   17 ( 40 )   27103 - 27108   2015

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/c5cp05029d

    Web of Science

    researchmap

  • 24pAF-10 Double QM/MM method for donor-acceptor electron transfer

    Tateyama Y., Futera Z., Sodeyama K.

    Meeting Abstracts of the Physical Society of Japan   70   3201 - 3201   2015

     More details

    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

    DOI: 10.11316/jpsgaiyo.70.1.0_3201

    CiNii Books

    researchmap

  • First Principles Calculation Study on Surfaces and Water Interfaces of Boron-Doped Diamond Reviewed

    Zdenek Futera, Takeshi Watanabe, Yasuaki Einaga, Yoshitaka Tateyama

    JOURNAL OF PHYSICAL CHEMISTRY C   118 ( 38 )   22040 - 22052   2014.9

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/jp506046m

    Web of Science

    researchmap

  • Termination Dependence of Tetragonal CH3NH3PbI3 Surfaces for Perovskite Solar Cells Reviewed

    Jun Haruyama, Keitaro Sodeyama, Liyuan Han, Yoshitaka Tateyama

    JOURNAL OF PHYSICAL CHEMISTRY LETTERS   5 ( 16 )   2903 - 2909   2014.8

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/jz501510v

    Web of Science

    researchmap

  • Acetonitrile Solution Effect on Ru N749 Dye Adsorption and Excitation at TiO2 Anatase Interface Reviewed

    Yoshitaka Tateyama, Masato Sumita, Yusuke Ootani, Koharu Aikawa, Ryota Jono, Liyuan Han, Keitaro Sodeyama

    JOURNAL OF PHYSICAL CHEMISTRY C   118 ( 30 )   16863 - 16871   2014.7

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/jp5004006

    Web of Science

    researchmap

  • Space-Charge Layer Effect at Interface between Oxide Cathode and Sulfide Electrolyte in All-Solid-State Lithium-Ion Battery Reviewed

    Jun Haruyama, Keitaro Sodeyama, Liyuan Han, Kazunori Takada, Yoshitaka Tateyama

    CHEMISTRY OF MATERIALS   26 ( 14 )   4248 - 4255   2014.7

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/cm5016959

    Web of Science

    researchmap

  • Sacrificial Anion Reduction Mechanism for Electrochemical Stability Improvement in Highly Concentrated Li-Salt Electrolyte Reviewed

    Keitaro Sodeyama, Yuki Yamada, Koharu Aikawa, Atsuo Yamada, Yoshitaka Tateyama

    JOURNAL OF PHYSICAL CHEMISTRY C   118 ( 26 )   14091 - 14097   2014.7

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/jp501178n

    Web of Science

    researchmap

  • Unusual Stability of Acetonitrile-Based Superconcentrated Electrolytes for Fast-Charging Lithium-Ion Batteries Reviewed

    Yuki Yamada, Keizo Furukawa, Keitaro Sodeyama, Keisuke Kikuchi, Makoto Yaegashi, Yoshitaka Tateyama, Atsuo Yamada

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   136 ( 13 )   5039 - 5046   2014.4

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/ja412807w

    Web of Science

    researchmap

  • Chiral Guest Binding as a Probe of Macrocycle Dynamics and Tautomerism in a Conjugated Tetrapyrrole Reviewed

    Jan Labuta, Zdenek Futera, Shinsuke Ishihara, Hana Kourilova, Yoshitaka Tateyama, Katsuhiko Ariga, Jonathan P. Hill

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   136 ( 5 )   2112 - 2118   2014.2

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/ja4124175

    Web of Science

    researchmap

  • 全固体電池内のLiCoO2/LiNbO3/Li3PS4界面におけるLiイオン空間電荷層のDFT+U計算

    春山 潤, 袖山 慶太郎, 高田 和典, 館山 佳尚

    表面科学学術講演会要旨集   34   70 - 70   2014

     More details

    Publisher:公益社団法人 日本表面科学会  

    我々は全固体リチウムイオン電池の実用化に向けた大きな問題である酸化物正極/硫化物電解質の界面抵抗の原因を調べるため, 界面の第一原理計算を行い, 修飾層の有無で界面構造の変化を調べた.典型的な系としてLiCoO2/LiNbO3/Li3PS4を扱い, 得られた界面の原子構造とLiイオン空孔の形成エネルギーから平衡状態と初期充電時の界面のリチウムイオン分布を求め, 界面抵抗の原因を推測した.

    DOI: 10.14886/sssj2008.34.0_70

    researchmap

  • A double-QM/MM method for investigating donor-acceptor electron-transfer reactions in solution Reviewed

    Zdenek Futera, Keitaro Sodeyama, Jaroslav V. Burda, Yasuaki Einaga, Yoshitaka Tateyama

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS   16 ( 36 )   19530 - 19539   2014

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/c4cp02307b

    Web of Science

    researchmap

  • Arylpyrrole oligomers as tunable anion receptors Reviewed

    Wim Van Rossom, Tatyana G. Terentyeva, Keitaro Sodeyama, Yoshitaka Matsushita, Yoshitaka Tateyama, Katsuhiko Ariga, Jonathan P. Hill

    ORGANIC & BIOMOLECULAR CHEMISTRY   12 ( 29 )   5492 - 5499   2014

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/c4ob00357h

    Web of Science

    researchmap

  • Hydrogen-enhanced vacancy embrittlement of grain boundaries in iron Reviewed

    Hiroyoshi Momida, Yusuke Asari, Yoshimichi Nakamura, Yoshitaka Tateyama, Takahisa Ohno

    PHYSICAL REVIEW B   88 ( 14 )   2013.10

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevB.88.144107

    Web of Science

    researchmap

  • Trimer effects in fragment molecular orbital-linear combination of molecular orbitals calculation of one-electron orbitals for biomolecules Reviewed

    Tomoki Kobori, Keitaro Sodeyama, Takao Otsuka, Yoshitaka Tateyama, Shinji Tsuneyuki

    JOURNAL OF CHEMICAL PHYSICS   139 ( 9 )   094113   2013.9

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/1.4818599

    Web of Science

    researchmap

  • A near-infrared cis-configured squaraine Co-sensitizer for high-efficiency dye-sensitized solar cells Reviewed

    Chuanjiang Qin, Youhei Numata, Shufang Zhang, Ashraful Islam, Xudong Yang, Keitaro Sodeyama, Yoshitaka Tateyama, Liyuan Han

    Advanced Functional Materials   23 ( 30 )   3782 - 3789   2013.8

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/adfm.201203384

    Scopus

    researchmap

  • Additive Effect on Reductive Decomposition and Binding of Carbonate-Based Solvent toward Solid Electrolyte Interphase Formation in Lithium-Ion Battery Reviewed

    Keisuke Ushirogata, Keitaro Sodeyama, Yukihiro Okuno, Yoshitaka Tateyama

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   135 ( 32 )   11967 - 11974   2013.8

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/ja405079s

    Web of Science

    researchmap

  • High performance organic field-effect transistors based on single-crystal microribbons and microsheets of solution-processed dithieno[3,2-b:2′, 3′-d]thiophene derivatives Reviewed

    Yu Seok Yang, Takuma Yasuda, Hayato Kakizoe, Hiroyuki Mieno, Hiori Kino, Yoshitaka Tateyama, Chihaya Adachi

    Chemical Communications   49 ( 58 )   6483 - 6485   2013.7

     More details

    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Royal Society of Chemistry  

    DOI: 10.1039/c3cc42114g

    Scopus

    researchmap

  • Amplification of Conformational Effects via tert-Butyl Groups: Hexa-tert-butyl Decacyclene on Cu(100) at Room Temperature Reviewed

    Greg Pawin, Adam Z. Stieg, Catherine Skibo, Maricarmen Grisolia, Reto R. Schilittler, Veronique Langlais, Yoshitaka Tateyama, Christian Joachim, James K. Gimzewski

    LANGMUIR   29 ( 24 )   7309 - 7317   2013.6

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/la304634n

    Web of Science

    researchmap

  • β-Cyclodextrin-crosslinked alginate gel for patient-controlled drug delivery systems: Regulation of host-guest interactions with mechanical stimuli Reviewed

    Hironori Izawa, Kohsaku Kawakami, Masato Sumita, Yoshitaka Tateyama, Jonathan P. Hill, Katsuhiko Ariga

    Journal of Materials Chemistry B   1 ( 16 )   2155 - 2161   2013.4

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/c3tb00503h

    Scopus

    researchmap

  • Nanoporous Carbon Sensor with Cage-in-Fiber Structure: Highly Selective Aniline Adsorbent toward Cancer Risk Management Reviewed

    Yasuhiro Kosaki, Hironori Izawa, Shinsuke Ishihara, Kohsaku Kawakami, Masato Sumita, Yoshitaka Tateyama, Qingmin Ji, Venkata Krishnan, Shunichi Hishita, Yusuke Yamauchi, Jonathan P. Hill, Ajayan Vinu, Seimei Shiratori, Katsuhiko Ariga

    ACS APPLIED MATERIALS & INTERFACES   5 ( 8 )   2930 - 2934   2013.4

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/am400940q

    Web of Science

    researchmap

  • Unusually stable similar to 100-fold reversible and instantaneous swelling of inorganic layered materials Reviewed

    Fengxia Geng, Renzhi Ma, Akira Nakamura, Kosho Akatsuka, Yasuo Ebina, Yusuke Yamauchi, Nobuyoshi Miyamoto, Yoshitaka Tateyama, Takayoshi Sasaki

    NATURE COMMUNICATIONS   4 ( 1 )   2013.3

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1038/ncomms2641

    Web of Science

    researchmap

  • Micrometer-level naked-eye detection of caesium particulates in the solid state Reviewed

    Taizo Mori, Masaaki Akamatsu, Ken Okamoto, Masato Sumita, Yoshitaka Tateyama, Hideki Sakai, Jonathan P. Hill, Masahiko Abe, Katsuhiko Ariga

    SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS   14 ( 1 )   015002   2013.2

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1088/1468-6996/14/1/015002

    Web of Science

    researchmap

  • Electronic structure of acetonitrile adsorbed on the anatase TiO2 (101) surface Reviewed

    Masato Sumita, Keitaro Sodeyama, Ryota Jono, Liyuan Han, Yoshitaka Tateyama

    CHEMICAL PHYSICS LETTERS   556   225 - 229   2013.1

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.cplett.2012.11.060

    Web of Science

    researchmap

  • Substitution effects of Ru-terpyridyl complexes on photovoltaic and carrier transport properties in dye-sensitized solar cells Reviewed

    Youhei Numata, Ashraful Islam, Keitaro Sodeyama, Zhen-Hua Chen, Yoshitaka Tateyama, Liyuan Han

    JOURNAL OF MATERIALS CHEMISTRY A   1 ( 36 )   11033 - 11042   2013

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/c3ta12152f

    Web of Science

    researchmap

  • Redox Reaction Mechanisms with Non-triiodide Mediators in Dye-Sensitized Solar Cells by Redox Potential Calculations Reviewed

    Ryota Jono, Masato Sumita, Yoshitaka Tateyama, Koichi Yamashita

    JOURNAL OF PHYSICAL CHEMISTRY LETTERS   3 ( 23 )   3581 - 3584   2012.12

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/jz301589a

    Web of Science

    researchmap

  • Ab initio investigation of defect formation at ZrO 2-CeO 2 interfaces Reviewed

    Marco Fronzi, Silvia Cereda, Yoshitaka Tateyama, Alessandro De Vita, Enrico Traversa

    Physical Review B - Condensed Matter and Materials Physics   86 ( 8 )   2012.8

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevB.86.085407

    Scopus

    researchmap

  • Ab initio investigation of defect formation at ZrO2-CeO2 interfaces Reviewed

    Marco Fronzi, Silvia Cereda, Yoshitaka Tateyama, Alessandro De Vita, Enrico Traversa

    PHYSICAL REVIEW B   86 ( 8 )   2012.8

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevB.86.085407

    Web of Science

    researchmap

  • 第一原理計算による光触媒系TiO2/H2O界面の原子スケール解析 Reviewed

    館山 佳尚

    表面科学   33 ( 6 )   345 - 350   2012.6

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Surface Science Society of Japan  

    First-principles studies on TiO2/H2O interfaces, representative photocatalytic systems, are reviewed. First I show ourrecent first-principles molecular dynamics study on anatase TiO2/H2O interfaces, with emphasis on the difference ofcalculation techniques and results from those in the previous studies. Then, arguments on water adsorption mode(molecular or dissociative etc.) on TiO2 rutile (110) surface are discussed. Finally, with our recent results, I introduce the difference of surface nanostructure stability between vacuum and aqueous conditions, which is relevant to the difference between dry and wet processes

    DOI: 10.1380/jsssj.33.345

    CiNii Books

    researchmap

    Other Link: https://jlc.jst.go.jp/DN/JALC/10006065538?from=CiNii

  • A New Factor Affecting the Performance of Dye-Sensitized Solar Cells in the Presence of 4-tert-Butylpyridine Reviewed

    Kun Zhang, Shufang Zhang, Keitaro Sodeyama, Xudong Yang, Han Chen, Masatoshi Yanagida, Yoshitaka Tateyama, Liyuan Han

    APPLIED PHYSICS EXPRESS   5 ( 4 )   042303   2012.4

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1143/APEX.5.042303

    Web of Science

    researchmap

  • Protonated Carboxyl Anchor for Stable Adsorption of Ru N749 Dye (Black Dye) on a TiO2 Anatase (101) Surface Reviewed

    Keitaro Sodeyama, Masato Sumita, Conn O'Rourke, Umberto Terranova, Ashraful Isam, Liyuan Han, David R. Bowler, Yoshitaka Tateyama

    JOURNAL OF PHYSICAL CHEMISTRY LETTERS   3 ( 4 )   472 - 477   2012.2

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/jz201583n

    Web of Science

    researchmap

  • Chemical soldering toward single molecule devices

    大川 祐司, 館山 佳尚, 青野 正和

    工業材料   60 ( 1 )   12 - 13   2012.1

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)  

    有機単分子に導電性高分子を一本ずつ配線する技術を開発し、「化学的ハンダづけ」と名付けた。これは、究極の微小デバイスとも言える単分子デバイスを実現するにあたってのキーテクノロジーとなるものである。

    researchmap

  • First-principles calculation analysis of redox processes at solid-liquid interfaces

    Tateyama Yoshitaka

    Abstract of annual meeting of the Surface Science of Japan   32   253 - 253   2012

     More details

    Publisher:The Surface Science Society of Japan  

    DOI: 10.14886/sssj2008.32.0_253

    researchmap

  • Water Contamination Effect on Liquid Acetonitrile/TiO2 Anatase (101) Interface for Durable Dye-Sensitized Solar Cell Reviewed

    Masato Sumita, Keitaro Sodeyama, Liyuan Han, Yoshitaka Tateyama

    JOURNAL OF PHYSICAL CHEMISTRY C   115 ( 40 )   19849 - 19855   2011.10

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/jp206910f

    Web of Science

    researchmap

  • Introduction: Chemical Soldering?!

    大川 祐司, 館山 佳尚, 青野 正和

    化学   66 ( 9 )   28 - 30   2011.9

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)  

    我々は、新しい単分子化学反応制御法を開発し、有機単分子に導電性高分子を一本ずつ配線することに成功した。化学的ハンダづけと名付けたこの方法について解説する。

    researchmap

  • Computational study on photo- and thermo-reactions between tetra-tert-butyl-substituted cyclobutadiene and tetrahedrane Reviewed

    Masato Sumita, Kazuya Saito, Yoshitaka Tateyama

    COMPUTATIONAL AND THEORETICAL CHEMISTRY   969 ( 1-3 )   44 - 52   2011.8

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.comptc.2011.05.011

    Web of Science

    researchmap

  • Chemical Wiring and Soldering toward All-Molecule Electronic Circuitry Reviewed

    Yuji Okawa, Swapan K. Mandal, Chunping Hu, Yoshitaka Tateyama, Stefan Goedecker, Shigeru Tsukamoto, Tsuyoshi Hasegawa, James K. Gimzewski, Masakazu Aono

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   133 ( 21 )   8227 - 8233   2011.6

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/ja111673x

    Web of Science

    researchmap

  • ZrO 2-CeO 2 interface properties: A first principle investigation Reviewed

    M. Fronzi, A. De Vita, Y. Tateyama, E. Traversa

    ECS Transactions   35 ( 2 )   1203 - 1210   2011

     More details

    Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: 10.1149/1.3570104

    Scopus

    researchmap

  • Proton diffusion in anhydrous nafion-blend membrane for high temperature PEFCs Reviewed

    Y. Tanaka, J. D. Kim, Y. Tateyama, J. Inoue, N. Kojima, K. Jimura, S. Hayashi, M. S. Jun, T. Mori, T. Ohno

    ECS Transactions   35 ( 32 )   107 - 113   2011

     More details

    Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: 10.1149/1.3655693

    Scopus

    researchmap

  • Conjugation of organic-metallic hybrid polymers and calf-thymus DNA Reviewed

    Jinghua Li, Zdenek Futera, Hongfang Li, Yoshitaka Tateyama, Masayoshi Higuchi

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS   13 ( 11 )   4839 - 4841   2011

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1039/c0cp02037k

    Web of Science

    researchmap

  • Nonadiabatic couplings from the Kohn-Sham derivative matrix: Formulation by time-dependent density-functional theory and evaluation in the pseudopotential framework Reviewed

    Chunping Hu, Osamu Sugino, Hirotoshi Hirai, Yoshitaka Tateyama

    PHYSICAL REVIEW A   82 ( 6 )   2010.12

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevA.82.062508

    Web of Science

    researchmap

  • Interface Water on TiO2 Anatase (101) and (001) Surfaces: First-Principles Study with TiO2 Slabs Dipped in Bulk Water Reviewed

    Masato Sumita, Chunping Hu, Yoshitaka Tateyama

    JOURNAL OF PHYSICAL CHEMISTRY C   114 ( 43 )   18529 - 18537   2010.11

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/jp105364z

    Web of Science

    researchmap

  • On the Role of Ascorbic Acid in the Synthesis of Single-Crystal Hyperbranched Platinum Nanostructures Reviewed

    Liang Wang, Chunping Hu, Yoshihiro Nemoto, Yoshitaka Tateyama, Yusuke Yamauchi

    CRYSTAL GROWTH & DESIGN   10 ( 8 )   3454 - 3460   2010.8

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/cg100207q

    Web of Science

    researchmap

  • Giant electric double-layer capacitance of heavily boron-doped diamond electrode Reviewed

    Takeshi Watanabe, Tomoko K. Shimizu, Yoshitaka Tateyama, Yousoo Kim, Maki Kawai, Yasuaki Einaga

    DIAMOND AND RELATED MATERIALS   19 ( 7-9 )   772 - 777   2010.7

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.diamond.2010.02.022

    Web of Science

    researchmap

  • First-principles simulation of redox reactions Reviewed

    館山 佳尚

    金属   80 ( 2 )   121 - 126   2010.2

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)  

    電子移動を伴う化学反応として定義される酸化還元反応は環境・エネルギー問題の諸現象において中心的役割を担っている。この酸化還元反応の特徴的物理量を非経験的に計算するための第一原理シミュレーション手法を開発し、その有効性を実証した。最近の固液界面の酸化還元反応への拡張にも触れながら、一連の手法開発・実証研究について紹介する。

    researchmap

  • Connecting single conductive polymers to a single functional molecule Reviewed

    Yuji Okawa, Swapan K. Mandal, Chunping Hu, Yoshitaka Tateyama, Stefan Goedecker, Shigeru Tsukamoto, Tsuyoshi Hasegawa, Masakazu Aono

    2010 10th IEEE Conference on Nanotechnology, NANO 2010   940 - 943   2010

     More details

    Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: 10.1109/NANO.2010.5697846

    Scopus

    researchmap

  • All-electron calculation of nonadiabatic couplings from time-dependent density functional theory: Probing with the Hartree-Fock exact exchange Reviewed

    Chunping Hu, Osamu Sugino, Yoshitaka Tateyama

    JOURNAL OF CHEMICAL PHYSICS   131 ( 11 )   114101   2009.9

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/1.3226344

    Web of Science

    researchmap

  • Preparation and Optical Properties of Fullerene/Ferrocene Hybrid Hexagonal Nanosheets and Large-Scale Production of Fullerene Hexagonal Nanosheets Reviewed

    Takatsugu Wakahara, Marappan Sathish, Kun'ichi Miyazawa, Chunping Hu, Yoshitaka Tateyama, Yoshihiro Nemoto, Toshio Sasaki, Osamu Ito

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   131 ( 29 )   9940 - 9944   2009.7

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/ja901032b

    Web of Science

    researchmap

  • Calculation of atomic excitation energies by time-dependent density functional theory within a modified linear response Reviewed

    Chunping Hu, Osamu Sugino, Yoshitaka Tateyama

    JOURNAL OF PHYSICS-CONDENSED MATTER   21 ( 6 )   2009.2

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1088/0953-8984/21/6/064229

    Web of Science

    researchmap

  • Excited State Carbene Formation from UV Irradiated Diazomethane Reviewed

    Hosik Lee, Yoshiyuki Miyamoto, Yoshitaka Tateyama

    JOURNAL OF ORGANIC CHEMISTRY   74 ( 2 )   562 - 567   2009.1

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1021/jo801853h

    Web of Science

    researchmap

  • Theoretical study of the initial oxidation processes on the Si(001) Reviewed

    N. Takahashi, Y. Nakamura, J. Nara, Y. Tateyama, T. Uda, T. Ohno

    SURFACE SCIENCE   602 ( 3 )   768 - 777   2008.2

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.susc.2007.12.004

    Web of Science

    researchmap

  • Free energy calculation of water addition coupled to reduction of aqueous RuO4- Reviewed

    Yoshitaka Tateyama, Jochen Blumberger, Takahisa Ohno, Michiel Sprik

    JOURNAL OF CHEMICAL PHYSICS   126 ( 20 )   204506   2007.5

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/1.2737047

    Web of Science

    researchmap

  • Real-time propagation time-dependent density functional theory study on the ring-opening transformation of the photoexcited crystalline benzene Reviewed

    Y Tateyama, N Oyama, T Ohno, Y Miyamoto

    JOURNAL OF CHEMICAL PHYSICS   124 ( 12 )   124507   2006.3

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/1.2181139

    Web of Science

    researchmap

  • Ab initio molecular dynamics simulation of redox reactions in solution Reviewed

    J Blumberger, Y Tateyama, M Sprik

    COMPUTER PHYSICS COMMUNICATIONS   169 ( 1-3 )   256 - 261   2005.7

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.cpc.2005.03.059

    Web of Science

    researchmap

  • Density-functional molecular-dynamics study of the redox reactions of two anionic, aqueous transition-metal complexes Reviewed

    Y Tateyama, J Blumberger, M Sprik, Tavernelli, I

    JOURNAL OF CHEMICAL PHYSICS   122 ( 23 )   234505   2005.6

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/1.1938192

    Web of Science

    researchmap

  • Theoretical study on hydrogen reaction processes on H/Si(001) surface Reviewed

    N Takahashi, J Nara, T Uda, Y Nakamura, Y Tateyama, T Ohno

    APPLIED SURFACE SCIENCE   244 ( 1-4 )   190 - 194   2005.5

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.apsusc.2004.09.138

    Web of Science

    researchmap

  • Hydrogen-promoted grain boundary embrittlement and vacancy activity in metals: Insights from ab initio total energy calculatons Reviewed

    Wen-Tong Geng, Arthur J. Freeman, Gregory B. Olson, Yoshitaka Tateyama, Takahisa Ohno

    Materials Transactions   46 ( 4 )   756 - 760   2005.4

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.2320/matertrans.46.756

    Scopus

    researchmap

  • NA

    大野 隆央, 館山 佳尚

    ふぇらむ   9 ( 12 )   920 - 921   2004.12

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)  

    鉄鋼の水素脆性メカニズムの解明を目標に、第一原理計算を用いて理論的考察を行った。鉄中の空孔−水素系に着目して、単原子空孔−水素複合体の安定性、空孔凝集に対する水素の効果を第一原理的に解析し、その結果に基づき破壊の初期過程である微小クラック形成に対する空孔の役割について検討した。

    CiNii Books

    researchmap

  • Stability and clusterization of hydrogen-vacancy complexes in α-Fe: An ab initio study

    Yoshitaka Tateyama, Takahisa Ohno

    Physical Review B - Condensed Matter and Materials Physics   67 ( 17 )   1741051 - 17410510   2003.5

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    Scopus

    researchmap

  • Stability and clusterization of hydrogen-vacancy complexes in alpha-Fe: An ab initio study Reviewed

    Y Tateyama, T Ohno

    PHYSICAL REVIEW B   67 ( 17 )   2003.5

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevB.67.174105

    Web of Science

    researchmap

  • Atomic-scale effects of hydrogen in iron toward hydrogen embrittlement: Ab-initio study Reviewed

    Y Tateyama, T Ohno

    ISIJ INTERNATIONAL   43 ( 4 )   573 - 578   2003

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.2355/isijinternational.43.573

    Web of Science

    researchmap

  • First-principles study on molecular dissociation under metallization pressure in aromatic monomolecular crystals with iodine atoms Reviewed

    Y Tateyama, T Ohno

    JOURNAL OF PHYSICS-CONDENSED MATTER   14 ( 44 )   10429 - 10432   2002.11

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    Web of Science

    researchmap

  • First-principles study of the ortho-KC60 polymer Reviewed

    T Ogitsu, TM Briere, K Kusakabe, S Tsuneyuki, Y Tateyama

    PHYSICAL REVIEW B   58 ( 20 )   13925 - 13930   1998.11

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevB.58.13925

    Web of Science

    researchmap

  • First-Principles Study on High-Pressure Synthesis of Hetero-Diamond BC2N

    Tateyama, Y., Ogitsu, T., Kusakabe, K., Tsuneyuki, S.

    Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu   7   1998

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.4131/jshpreview.7.187

    Scopus

    researchmap

  • Can Corrugated Si-Planes of CaSi2 Flatten under High Pressure? Reviewed

    Koichi Kusakabe, Yoshitaka Tateyama, Tadashi Ogitsu, Shinji Tsuneyuki

    Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu   7   193 - 195   1998

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.4131/jshpreview.7.193

    Scopus

    researchmap

  • Theoretical Design of BCN Heterodiamond Reviewed

    Shinji Tsuneyuki, Yoshitaka Tateyama

    Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu   8 ( 4 )   268 - 272   1998

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.4131/jshpreview.8.268

    Scopus

    researchmap

  • First-principles studies on the transformations of graphite to diamond Reviewed

    Y Tateyama, T Ogitsu, K Kusakabe, S Tsuneyuki

    PROPERTIES OF EARTH AND PLANETARY MATERIALS AT HIGH PRESSURE AND TEMPERATURE   101   153 - 158   1998

     More details

    Language:English   Publishing type:Research paper (international conference proceedings)  

    Web of Science

    researchmap

  • Electronic states of BC2N heterodiamond(111) superlattices Reviewed

    Y Tateyama, K Kusakabe, T Ogitsu, S Tsuneyuki

    SILICON CARBIDE, III-NITRIDES AND RELATED MATERIALS, PTS 1 AND 2   264-2   311 - 314   1998

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    Web of Science

    researchmap

  • Role of Conduction Electrons in the ortho-KC$_{60}$ Polymer

    Yoshitaka Tateyama

    ArXiv   1997

     More details

    Publishing type:Research paper (scientific journal)  

    researchmap

  • Proposed synthesis path for heterodiamondN Reviewed

    Y. Tateyama, T. Ogitsu, K. Kusakabe, S. Tsuneyuki, S. Itoh

    Physical Review B - Condensed Matter and Materials Physics   55 ( 16 )   R10161 - R10164   1997

     More details

    Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevB.55.R10161

    Scopus

    researchmap

  • Constant-pressure first-principles studies on the transition states of the graphite-diamond transformation Reviewed

    Y. Tateyama, T. Ogitsu, K. Kusakabe, S. Tsuneyuki

    Physical Review B - Condensed Matter and Materials Physics   54 ( 21 )   14994 - 15001   1996

     More details

    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevB.54.14994

    Scopus

    researchmap

▼display all

MISC

  • Magnesium deposition mechanism in the magnesium battery electrolyte with weakly coordinated anions

    山本健太郎, FEILURE Tuerxun, 万代俊彦, 中西康次, 袖山慶太郎, 館山佳尚, 内山智貴, 松永利之, 金村聖志, 内本喜晴

    電気化学会大会講演要旨集(CD-ROM)   87th   2020

  • アルカリ水電解用鉄系酸素発生触媒の開発

    菅原勇貴, 鎌田慶吾, 石川敦之, 館山佳尚, 山口猛央

    化学工学会秋季大会研究発表講演要旨集(CD-ROM)   51st   2020

  • Near-Shore Aggregation Mechanism of Electrolyte Decomposition Products to Explain Solid Electrolyte Interphase Formation

    ( 62 )   170 - 178   2017

     More details

    Language:English  

    CiNii Books

    researchmap

  • Concentrated electrolytes: A new electrolyte design for advanced batteries Invited

    Yuki Yamada, Keitaro Sodeyama, Yoshitaka Tateyama, Atsuo Yamada

    Battery Technology   26   14 - 25   2016

     More details

    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)  

    researchmap

  • 7pAS-2 First-principles study on atomic structure and Li-ion space charge layer at oxide cathode/sulfide electrolyte interface in all-solid-state Li-ion batteries

    Haruyama Jun, Sodeyama Keitaro, Takada Kazunori, Tateyama Yoshitaka

    Meeting abstracts of the Physical Society of Japan   69 ( 2 )   637 - 637   2014.8

     More details

    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

    CiNii Books

    researchmap

  • 28pAQ-4 DFT-MD study on redox reactions at oxide-solution interfaces

    Tateyama Yoshitaka

    Meeting abstracts of the Physical Society of Japan   69 ( 1 )   880 - 880   2014.3

     More details

    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

    CiNii Books

    researchmap

  • Reply to "comment on 'Nonadiabatic couplings from the Kohn-Sham derivative matrix: Formulation by time-dependent density-functional theory and evaluation in the pseudopotential framework'"

    Chunping Hu, Osamu Sugino, Hirotoshi Hirai, Yoshitaka Tateyama

    Physical Review A - Atomic, Molecular, and Optical Physics   88 ( 5 )   2013.11

     More details

    Language:English   Publishing type:Book review, literature introduction, etc.  

    DOI: 10.1103/PhysRevA.88.056502

    Scopus

    researchmap

  • 21pHA-13 Adsorption and excitation of Ru(II) polypyridyl complex on TiO_2 anatase(101) surface for dye-sensitized solar cells

    Sodeyama Keitaro, Sumita Masato, Tateyama Yoshitaka

    Meeting abstracts of the Physical Society of Japan   66 ( 2 )   904 - 904   2011.8

     More details

    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

    CiNii Books

    researchmap

  • Water contamination effect on liquid acetonitrile / TiO2 anatase (101) interface as an electrode of dye-sensitized solar cell

    SUMITA Masato, SODEYAMA Keitaro, TATEYAMA Yoshitaka

    Abstract of annual meeting of the Surface Science of Japan   31 ( 0 )   136 - 136   2011

     More details

    Language:Japanese   Publisher:公益社団法人 日本表面科学会  

    アナターゼTiO&lt;sub&gt;2&lt;/sub&gt;とアセトニトリル(MeCN)界面は色素増感太陽電池(DSSC)における重要な系である.DSSCは大気下で作成されるため水分子の混入を防ぐ事は困難であると考えられる.従って,混入した水分子の効果を考慮することは重要である.本研究では,第一原理分子動力学法を用いてTiO&lt;sub&gt;2&lt;/sub&gt;/液体MeCN界面付近の水分子の構造と電子状態を解析し,どのような条件下でDSSCを作る事が望ましいかを報告する.

    DOI: 10.14886/sssj2008.31.0.136.0

    researchmap

  • Structural and electronic properties of TiO2/H2O interfaces

    TATEYAMA YOSHITAKA, SUMITA MASATO

    Abstract of annual meeting of the Surface Science of Japan   31 ( 0 )   135 - 135   2011

     More details

    Language:Japanese   Publisher:公益社団法人 日本表面科学会  

    第一原理DFT分子動力学サンプリングを用いて、代表的な光触媒系であるTiO2電極/水界面の室温平衡下における構造的および電子的性質を原子・電子スケールから明らかにした。アナターゼ型およびルチル型構造の表面に対し、バルク水の存在下における表面欠陥・再構成の安定性、表面への水分子の吸着様式、界面における特殊な水素結合について微視的知見を得たのち、光触媒反応の理解の鍵となる電子状態の解析を行った。

    DOI: 10.14886/sssj2008.31.0.135.0

    researchmap

  • 20pGL-4 First-principles MD simulations on water adsorption and interfacial water on TiO_2 anatase/bulk water interfaces

    Sumita Masato, Hu Chunping, Tateyama Yoshitaka

    Meeting abstracts of the Physical Society of Japan   65 ( 1 )   925 - 925   2010.3

     More details

    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

    CiNii Books

    researchmap

  • 23aGP-1 First-principles study of chain polymerization on surfaces : Large-scale calculations using BigDFT

    Hu Chunping, Tateyama Yoshitaka, Goedecker Stefan, Okawa Yuji, Aono Masakazu

    Meeting abstracts of the Physical Society of Japan   65 ( 1 )   961 - 961   2010.3

     More details

    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

    CiNii Books

    researchmap

  • 28aPS-20 Excited-State Dynamics of Spin-Polarized Systems by Time-Dependent Density Functional Theory (TDDFT)

    Hu Chunping, Miyamoto Yoshiyuki, Tateyama Yoshitaka

    Meeting abstracts of the Physical Society of Japan   64 ( 2 )   226 - 226   2009.8

     More details

    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

    CiNii Books

    researchmap

  • 28aRC-8 All-Electron Calculation of Nonadiabatic Couplings from Time-Dependent Density Functional Theory (TDDFT)

    Hu Chunping, Sugino Osamu, Tateyama Yoshitaka

    Meeting abstracts of the Physical Society of Japan   64 ( 1 )   280 - 280   2009.3

     More details

    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

    CiNii Books

    researchmap

  • 30aRD-11 Ab-initio MD study on properties of diamond/water interface

    Tateyama Y., Watanabe T., Einaga Y.

    Meeting abstracts of the Physical Society of Japan   64 ( 1 )   919 - 919   2009.3

     More details

    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

    CiNii Books

    researchmap

  • 21pWB-11 Ab-initio MD simulation study on trihalides in solution

    Tateyama Yoshitaka

    Meeting abstracts of the Physical Society of Japan   63 ( 2 )   316 - 316   2008.8

     More details

    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

    CiNii Books

    researchmap

  • 19pPSB-34 Theoretical Study of E_<2g> Phonon of Graphite in Excited States

    Momida Hiroyoshi, Tateyama Yoshitaka, Ohno Takahisa

    Meeting abstracts of the Physical Society of Japan   62 ( 1 )   736 - 736   2007.2

     More details

    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

    CiNii Books

    researchmap

  • 30aXH-2 Electron-nucleus dynamics of photo-excited molecule by the real-time propagation TDDFT

    Tateyama Y., Oyama N., Ohno T., Miyamoto Y.

    Meeting abstracts of the Physical Society of Japan   61 ( 1 )   330 - 330   2006.3

     More details

    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

    CiNii Books

    researchmap

  • 27aYF-2 Grand-canonical Car-Parrinello MD study on redox reactions in aqueous solution

    Tateyama Yoshitaka, Sprik Michiel

    Meeting abstracts of the Physical Society of Japan   60 ( 1 )   315 - 315   2005.3

     More details

    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

    CiNii Books

    researchmap

  • 27pPSA-38 Dynamics of the atomic H reaction on H-terminated Si(001) surface

    Takahashi Norihiko, Nara Jun, Uda Tsuyoshi, Nakamura Yoshimichi, Tateyama Yoshitaka, Ohno Takahisa

    Meeting abstracts of the Physical Society of Japan   59 ( 1 )   897 - 897   2004.3

     More details

    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

    CiNii Books

    researchmap

  • Ab-initio study on hydrogen effects on defect behaviors in metals

    Tateyama Yoshitaka

    Meeting abstracts of the Physical Society of Japan   58 ( 1 )   922 - 922   2003.3

     More details

    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

    CiNii Books

    researchmap

  • Pressure-induced metallisation and decomposition in aromatic monomolecular crystals

    Yoshitaka Tateyama

    Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu   13 ( 3 )   236 - 243   2003

     More details

    Language:Japanese   Publishing type:Book review, literature introduction, etc.   Publisher:Japan Society of High Pressure Science and Technology  

    DOI: 10.4131/jshpreview.13.236

    Scopus

    researchmap

  • First-principles calculations of hydrogen behaviors in bcc iron under stress field

    Tateyama Yoshitaka, Ohno Takahisa

    Meeting abstracts of the Physical Society of Japan   57 ( 2 )   813 - 813   2002.8

     More details

    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

    CiNii Books

    researchmap

  • 24pXM-9 Pressure-induced Metallization in Aromatic Monomolecular Solids : Ab-initio Study

    Tateyama Yoshitaka

    Meeting abstracts of the Physical Society of Japan   57 ( 1 )   770 - 770   2002.3

     More details

    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

    CiNii Books

    researchmap

  • Classical Ab-initio Multiscale Simulations (CAMUS) of Brittle Fracture Dynamics

    Ohno T., Tateyama Y., Ezaki T., Oyama N.

    Meeting abstracts of the Physical Society of Japan   55 ( 2 )   826 - 826   2000.9

     More details

    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

    CiNii Books

    researchmap

  • First-Principles Study on Vacancy-Hydrogen Complex Effects on Crack Formation in α-Fe

    Tateyama Y., Ohno T.

    Meeting abstracts of the Physical Society of Japan   55 ( 2 )   852 - 852   2000.9

     More details

    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

    CiNii Books

    researchmap

  • First-principles investigation of unknown structures and properties of materials under pressure

    Y. Tateyama

    Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu   10 ( 2 )   134 - 141   2000

     More details

    Language:Japanese   Publishing type:Book review, literature introduction, etc.   Publisher:Japan Society of High Pressure Science and Technology  

    DOI: 10.4131/jshpreview.10.134

    Scopus

    researchmap

  • 24aYL-8 Hydrogen effect on vacancies in bcc iron from first-principles calculations

    Tateyama Y, Miyazaki T, Ohno T

    Meeting abstracts of the Physical Society of Japan   54 ( 2 )   857 - 857   1999.9

     More details

    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

    CiNii Books

    researchmap

  • 24aYL-7 First-principles study on quantum state of interstitial hydrogen in bcc iron

    Tateyama Y, Miyazaki T, Ohno T

    Meeting abstracts of the Physical Society of Japan   54 ( 2 )   857 - 857   1999.9

     More details

    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

    CiNii Books

    researchmap

  • 28a-ZA-5 First-principles study on hydrogen state in bcc metals

    Tateyama Y., Miyazaki T., Ohno T.

    Meeting abstracts of the Physical Society of Japan   54 ( 1 )   100 - 100   1999.3

     More details

    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

    CiNii Books

    researchmap

  • 29a-D-10 Ab initio study of Polymerlization mechanism of A_1C_<60>

    Ogitsu T, Kusakabe K, Tsuneyuki S, Tateyama Y

    Meeting abstracts of the Physical Society of Japan   52 ( 1 )   274 - 274   1997.3

     More details

    Language:Japanese   Publisher:The Physical Society of Japan (JPS)  

    CiNii Books

    researchmap

▼display all

Presentations

  • Computational studies on Li+ and H+ dynamics in Garnet LLZO: From bulk (with defects) to surfaces Invited

    Yoshitaka Tateyama

    5th World Conference on Solid Electrolytes for Advanced Applications: Garnets and Beyond (LLZO5WC)  2025.7 

     More details

    Event date: 2025.7

    Language:English   Presentation type:Oral presentation (invited, special)  

    researchmap

  • Data-driven Diagnosis for Lithium Metal Anode Battery Degradation Invited

    Yoshitaka Tateyama

    International Symposium on AI for Electrochemistry (iSAIEC 2025)  2025.6 

     More details

    Event date: 2025.6

    Language:English   Presentation type:Oral presentation (keynote)  

    researchmap

  • Interface Chemistry and Ion Transport in Battery Materials by Advanced DFT-based Calculations Invited

    Yoshitaka Tateyama

    Understanding Surfaces and Interfaces: A Symposium Celebrating 7 Decades of Service  2025.3 

     More details

    Event date: 2025.3

    Language:English   Presentation type:Oral presentation (invited, special)  

    researchmap

  • Microscopic Ion Transport Mechanism in Cathodes, Solid Electrolytes and Their Interfaces Via Atomistic Simulations Invited

    Yoshitaka Tateyama

    Advanced Green-Energy Materials Conference (AGEM)  2025.1 

     More details

    Event date: 2025.1

    Language:English   Presentation type:Oral presentation (keynote)  

    researchmap

  • Interface Chemistry and Ion Transport in Solid-State Battery Materials by Advanced DFT-based Calculations Invited

    Yoshitaka Tateyama

    The 8th International Conference on Electronic Materials and Nanotechnology for Green Environment (ENGE2024)  2024.11 

     More details

    Event date: 2024.11

    Language:English   Presentation type:Oral presentation (invited, special)  

    researchmap

  • Theoretical elucidation of microscopic Na-ion state/dynamics in NIB electrodes and (solid) electrolyte Invited

    Yoshitaka Tateyama

    The 9th International Conference on Sodium Batteries (ICNaB),  2024.11 

     More details

    Event date: 2024.11

    Language:English   Presentation type:Oral presentation (invited, special)  

    researchmap

  • 全固体電池内のイオン・電子計算科学の最前線 Invited

    館山佳尚

    全固体電池学術共同研究拠点 全固体電池研究セミナー(第13回)  2025.7 

     More details

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    researchmap

  • Computational study on atomic structure and ion transport in NIB electrodes Invited

    Yoshitaka Tateyama

    UK-Japan Energy Storage Research Programme  2025.5 

     More details

    Event date: 2025.5

    Language:English   Presentation type:Oral presentation (invited, special)  

    researchmap

  • Advanced MD Study on Ion Transport in Battery Solid Electrolyte Invited

    Yoshitaka Tateyama

    2024 Taiwan-Japan Joint Symposium ~ Beyond our Future with People, Intelligence and Materials  2024.12 

     More details

    Event date: 2024.12

    Language:English   Presentation type:Oral presentation (invited, special)  

    researchmap

  • Strain Effects on Li-ion Transport around Cathode-Coating Interfaces: A DFT Study Invited

    Yoshitaka Tateyama

    The 14th Japan-France Joint Meeting on Battery  2024.9 

     More details

    Event date: 2024.9

    Language:English   Presentation type:Oral presentation (invited, special)  

    researchmap

  • Microscopic electrochemistry for interface ionics based on DFT calculation Invited

    Yoshitaka Tateyama

    Workshop on Interfacial Chemistry and Charge Transfer for Energy Storage and Conversion  2024.8 

     More details

    Event date: 2024.8

    Language:English   Presentation type:Oral presentation (invited, special)  

    researchmap

  • Strain Effects on Li-ion Transport around Cathode-Coating Interfaces: A DFT Study

    Yoshitaka Tateyama, Zizhen Zhou, Huu Duc Luong, Bo Gao

    24rh International Conference on Solid State Ionics (SSI24)  2024.7 

     More details

    Event date: 2024.7

    Language:English   Presentation type:Oral presentation (general)  

    researchmap

  • Microscopic Elucidation of Ion Transport in Cathodes, Solid Electrolytes and Their Interfaces Via Atomistic Simulations Invited

    Yoshitaka Tateyama

    IMLB2024 (The 22nd International Meeting on Lithium Batteries),  2024.6 

     More details

    Event date: 2024.6

    Language:English   Presentation type:Oral presentation (invited, special)  

    researchmap

  • First-Principles Calculation Study on Degradation-Related Phenomena around Cathode/Solid Electrolyte Interfaces in Solid-State Battery Invited

    Yoshitaka Tateyama

    2024 MRS SPRING MEETING & EXHIBIT  2024.4 

     More details

    Event date: 2024.4

    Language:English   Presentation type:Oral presentation (invited, special)  

    researchmap

  • Interface Chemistry and Ion Transport in Batteries Revealed by Advanced First-Principles Calculations Invited

    Yoshitaka Tateyama

    Japanese-German Joint Seminar on Sustainable Batteries  2023.11 

     More details

    Event date: 2023.11

    Language:English   Presentation type:Oral presentation (invited, special)  

    researchmap

  • Advanced MD Study on Ion Transport in Battery Solid Electrolyte Invited

    Yoshitaka Tateyama

    Structure and Dynamics of Chemical and Biomolecular Systems (SDCBS23),  2023.10 

     More details

    Event date: 2023.10

    Language:English   Presentation type:Oral presentation (invited, special)  

    researchmap

  • Microscopic Elucidation of Battery “Interfaces” and “Ionics” Via Atomistic Simulations Invited

    Yoshitaka Tateyama

    Kick-off Meeting of JST ASPIRE project -International Collaboration Network for Innovative Battery Technology and Net-Zero Society  2024.6 

     More details

    Language:English   Presentation type:Oral presentation (invited, special)  

    researchmap

  • Lithium-air batteries: a DFT-MD study of the stability of Li+ + O2*- and LiO*- in DMSO and PC electrolytes

    Johan Scheers, FUTERA, Zdenek, SODEYAMA, Keitaro, TATEYAMA, Yoshitaka

    224th ECS Meeting  2013.10 

     More details

    Language:English  

    Here we present the results from DFT-MD simulations of the radicals O2*&#8211; and LiO*&#8211; in PC and dimetylsulfoxide (DMSO) with the aim of identifying electrolyte properties that could be used to a priori address the compatibility of electrolyte solvents and oxygen reduction products in Li&#8211;O2 batteries.

    researchmap

  • DFT-MD Analysis of Redox Reaction at Solid-Electrolyte Interface in Battery and Solar Cell

    TATEYAMA, Yoshitaka

    16th Asian workshop on first-principles electronic structure cal  2013.10 

     More details

    Language:English  

    Redox reactions (electron transfer) at solid-liquid interfaces play crucial roles in diverse topics in energy and environmental issues, such as Lithium ion battery (LIB), dye-sensitized solar cell (DSSC), fuel cell and photocatalysis. Although many developments have been already made in these fields, the atomistic mechanisms have been still open questions.In this talk, I'll introduce our recent works on the LIB electrolytes [1] and the interfaces of DSSC [2-3].

    researchmap

  • High-Throughput DFT-level Self-Diffusion Coefficient Calculation for Na-ion Sulfide SEs + Electronic States Discussion Invited

    Yoshitaka Tateyama

    Workshop bridging between theory and experiment on all-solid-state battery materials,  2024.6 

     More details

    Language:English   Presentation type:Oral presentation (invited, special)  

    researchmap

  • Beta-Cyclodextrin-crosslinked alginate gel operated by mechanical stimuli: towards patient-controlled drug delivery systems

    KAWAKAMI, Kohsaku, IZAWA, Hironori, SUMITA, Masato, TATEYAMA, Yoshitaka, HILL, Jonathan, ARIGA, Katsuhiko

    AAPS Annual Meeting and Exposition 2013  2013.11 

     More details

    Language:English  

    Although various drug delivery technologies have been developed, there are no current methods that enable ubiquitous dosage control by patients. Here we report a novel controlled release system with Cyclodextrin (CyD) -crosslinked alginate (AL), CCAL, composed of a CyD derivative junction point with AL as a main chain polymer, triggered by a mechanical stimulus generated by a patient’s hand.

    researchmap

  • 蓄電池内部のカチオンダイナミクスに関する高度分子動力学シミュレーション Invited

    館山佳尚

    令和6年度中性子産業利用報告会  2024.7 

     More details

    Language:English   Presentation type:Oral presentation (invited, special)  

    researchmap

  • 京コンピュータ上での第一原理分子動力学計算を用いたリチウムイオン二次電池の電解液化学反応とSEI形成過程の微視的解析

    館山 佳尚

    日本化学会 電気化学ディビジョン 化学電池材料研究会 第33回講  2013.12 

     More details

    Language:Japanese  

    1:第一原理分子動力学法と酸化還元反応の記述2:LIB負極付近の電解液還元分解・重合の添加剤効果について3:最近の研究A: グラファイト負極ーEC電解液界面のSEIの構造と性質、B: 電解液(溶媒、添加剤)・リチウム塩探索、C: 正極ー固体電解質界面の解析

    researchmap

  • DFT-MD blue-moon ensemble study on reductive decomposition of carbonated-based solvent in lithium ion battery

    TATEYAMA, Yoshitaka, Keisuke Ushirogata, SODEYAMA, Keitaro, Yukihiro Okuon

    International Symposium on Extended Molecular Dynamics and Enhan  2014.11 

     More details

    Language:English  

    Solid electrolyte interphase (SEI) formed through the reductive decomposition of electrolyte molecules plays a crucial role in the performance and stability of lithium-ion battery (LIB). Here we investigated the additive effects on the reductive decomposition, using a typical electrolyte system with ethylene carbonate (EC) solvent and vinylene carbonate (VC) additive.

    researchmap

  • Preparation and Optical Properties of Fullerene/Ferrocene Hybrid Hexagonal Nanosheets

    WAKAHARA, Takatsugu, MIYAZAWA, Kunichi, MARAPPAN, Sathish, HU, Chunping, TATEYAMA, Yoshitaka, NEMOTO, Yoshihiro, SASAKI, Toshio, Osamu Ito

    NMS-V  2009.10 

     More details

    Language:English  

    We herein report a simple method for the preparation of C60/Fc hybrid nanowhiskers and hexagonal nanosheets by a liquid-liquid interfacial precipitation (LLIP) method. The highly crystallized C60/ferrocene hexagonal nanosheets had the formulation C60(ferrocene)2. A strong charge-transfer (CT) band between ferrocene and C60 was observed at 782 nm, indicating the presence of donor-acceptor interaction in the nanosheets. Upon heating the nanosheets to 150 &#61616;C, the CT band disappeared due to the sublimation of ferrocene from the C60/ferrocene hybrid, and C60 nanosheets with an fcc crystal structure and the same shape and size as the C60/ferrocene nanosheets were obtained.

    researchmap

  • 全固体電池表面界面の第一原理計算解析

    館山 佳尚

    物性研究所計算物質科学研究センター 第4回シンポジウム・物性研スー  2014.11 

     More details

    Language:Japanese  

    我々は現在固液界面に焦点を当てた電池内部の機構解明を行っているが、上記の安全性の観点に加え、固液界面と固固界面の相違点と類似点の探索という基礎的観点から、全固体電池に関連する研究もスタートさせた。その中で(1)”全固体リチウム二次電池内の硫化物電解質―遷移金属酸化物正極界面のリチウムイオン状態”及び(2)”ペロブスカイト型太陽電池のペロブスカイト材料表面終端と界面ホール輸送”に関する世界初の第一原理計算解析について紹介する。

    researchmap

  • Nonadiabatic couplings from time-dependent density functional theory: Recent progress

    HU, Chunping, SUGINO Osamu, TATEYAMA, Yoshitaka

    The 12th Asian Workshop on First-Principles Electronic Structure  2009.10 

     More details

    Language:English  

    Nowadays it is recognized that conical intersections of potential energy surfaces (PES) are ubiquitous in chemical systems. The existence of these crossing points renders the Born-Oppenheimer approximation break down: not only PES but also nonadiabatic couplings (NAC) are needed for nonadiabatic simulations. Recently we presented a rigorous formulation of NAC from time-dependent density functional theory and carried out extensive calculations around various types of intersections. Challenges of the pseudopotential approximation were revealed for the computation of NAC. The comparison study in the all-electron framework has further verified this point, and shown that it is necessary to make assessment on exchange-correlation effects near intersection points.

    researchmap

  • Adsorption, Excitation and Charge Transfer of Black Dye at TiO2 Anatase/Acetonitrile Interface in DSC

    TATEYAMA, Yoshitaka, OTANI, Yusuke, HAN, Liyuan, SODEYAMA, Keitaro

    The 2nd International Symposium on the Functionality of Organize  2014.11 

     More details

    Language:English  

    Although the organic-inorganic hybrid perovskites have emerged as solar cells with higher efficiency, the interfacial chemistry of conventional Ru dyes at TiO2 - acetonitrile interfaces in dye-sensitized solar cells (DSCs) is still an issue of fundamental importance. We then investigated stable structures and photoexcitation character of Black Dye (BD; Ru N749 dye) adsorption to TiO2 anatase (101) interface immersed in bulk acetonitrile (AN) solution, a most representative DSC system. Density functional theory based molecular dynamics (DFT-MD) with explicit solvent molecules was used to take into account the fluctuations of solvation shells and adsorbed molecules. We have also combined time-dependent DFT calculations of the excitation energies and oscillator strengths for the discussion o

    researchmap

  • Connection of polydiacetylene nanowires to a single functional molecule via covalent bonds

    OKAWA, Yuji, MANDAL, Swapan Kumar, HASEGAWA, Tsuyoshi, TSUKAMOTO, Shigeru, HU, Chunping, TATEYAMA, Yoshitaka, HILL, Jonathan, ARIGA, Katsuhiko, AONO, Masakazu

    MNC 2009  2009.11 

     More details

    Language:English  

    We show our recent experimental and theoretical results which demonstrate the connection of polydiacetylene nanowires to a single phthalcyanine molecule via covalent bonds.

    researchmap

  • Novel reaction mechanism of Lithium-ion battery electrolyte by DFT free energy calculation with parallel blue-moon ensemble on K computer

    TATEYAMA, Yoshitaka

    International Symposium on Computics: Quantum Simulation and Des  2014.12 

     More details

    Language:English  

    Solid electrolyte interphase (SEI) formed through the reductive decomposition of electrolyte molecules plays a crucial role in the performance and stability of lithium-ion battery (LIB), a key technology for today

    researchmap

  • Nonadiabatic couplings from time-dependent density functional theory: Recent progress

    胡 春平, 杉野修, 館山 佳尚

    ナノ統合シミュレーションソフトウェアの研究開発第4回公開シンポ  2010.3 

     More details

    Language:Japanese  

    我々は、時間依存密度汎関数理論による非断熱結合の厳密な計算式を導出した。平面波・擬ポテンシャル近似で実証した結果、様々の系で計算精度が良好であることを確認した。一方、擬ポテンシャル近似の問題点も明らかになった。そこで、我々はさらに全電子・原子基底計算手法を開発し、非断熱結合の計算の妥当性を系統的に調べることを行った。

    researchmap

  • ドナー・アクセプター間電子移動反応に向けたdouble QM/MM法開発

    館山 佳尚, フテラ ズデニェク, 袖山 慶太郎

    日本物理学会第70回年次大会  2015.3 

     More details

    Language:Japanese  

    我々はdouble QM/MM手法を開発した。この手法はconstraint DFT と同じコンセプトを有するが、ドナー領域とアクセプター領域の区別がより明確にできるという利点を持つ。

    researchmap

  • TiO2 anatase/水界面の水分子吸着に関する 第一原理分子動力学シミュレーション

    館山 佳尚, 隅田 真人, 胡 春平

    日本物理学会2010年春季大会  2010.3 

     More details

    Language:Japanese  

    代表的な光触媒系であるTiO2 アナターゼはすでに多くの応用例があるものの、水溶液との界面で起こっている原子スケールの反応メカニズムー光誘起有害分子分解(酸化)や超親水化などーは未だに良く分かっていない。そのような問題を明らかにするため、我々は第一原理MDを用いた自由エネルギーをベースとする酸化還元反応解析に取り組んでいる。本講演ではその第一段階であるTiO2 アナターゼ(101)及び(001)/水界面の平衡状態解析の結果について報告する1

    researchmap

  • 第一原理統計力学による太陽電池・光触媒界面の動作環境下電荷移動・励起過程の解明

    館山 佳尚

    JST CREST・さきがけ「相界面」研究領域第1回公開シンポジウム  2015.3 

     More details

    Language:Japanese  

    JSTさきがけにおける研究成果全体を紹介する。

    researchmap

  • First-principles study of chain polymerization on surfaces: Large-scale calculations using BigDFT

    胡 春平, 館山 佳尚, Stefan Goedecker, 大川 祐司, 青野 正和

    日本物理学会第65回年次大会  2010.3 

     More details

    Language:Japanese  

    ナノスケールデバイス(細線、スイッチなど)の効率的作成方法として表面上の有機分子膜の連鎖重合反応の利用に期待がよせられている。我々はグラファイト表面上に自己組織化された有機分子(ジアセチレン化合物のモノマー)膜の上にさらに機能性分子(フタロシアニン:Pc)を置いた時に、連鎖重合反応の進行が抑制されるというSTM観測に対して、大規模第一原理計算による構造安定性の比較を通して、その連鎖反応の進行メカニズムに対する理論的検討を行った。

    researchmap

  • 第一原理MDサンプリングによる固液界面酸化還元反応の解析

    館山 佳尚

    次世代ナノ・連続研究会:燃料電池(No.3)  2009.11 

     More details

    Language:Japanese  

    触媒、電池系ではその反応の多くが固液界面で起こります。この「固液界面での酸化還元反応」の電子・原子レベルからの理解はまだ完全にはほど遠い状態です。このような状況を理論計算側から解明すべく、我々は様々な酸化還元反応に対する第一原理分子動力学(MD)計算手法の開発・確立を行い、溶液系・固液界面系を用いて実証してきました。本講演では最近の題材を含めて、その一端を紹介したいと思います。

    researchmap

  • 第一原理ダイナミクス・サンプリング解析による&#8194;リチウムイオン電池内反応機構の解明

    館山 佳尚

    近畿化学協会コンピュータ化学部会 公開講演会  2015.1 

     More details

    Language:Japanese  

    第一原理ダイナミクス・サンプリング解析による&#8194;リチウムイオン電池内反応機構の解明の最近の研究を紹介した。

    researchmap

  • Ultrafast Lattice Dynamics of Graphite under Intense Photoexcitation

    ISHIOKA, Kunie, MOMIDA, Hiroyoshi, TATEYAMA, Yoshitaka, KITAJIMA, Masahiro, OHNO, Takahisa

    International Symposium on the Physics of Excitation-assisted N  2009.11 

     More details

    Language:English  

    Irradiationn of femtosecond laser pulses below the ablation threshold generates coherent phonons as well as photocarriers in graphite. In the present study, we investigate the interlayer (E2g1) lattice dynamics of graphite under intense laser excitation beyond the harmonic limit but below the ablation threshold. Transient reflectivity shows an amplitude beating above a threshold laser pulse energy. We carry out first-principles calculations based on the density functional theory with the local density approximation to examine possible reason for the observed result.

    researchmap

  • ダイヤモンド電極の化学反応性の第一原理シミュレーション

    館山 佳尚

    ニューダイヤモンドフォーラム平成26年度第3回研究会  2015.1 

     More details

    Language:Japanese  

    本研究ではボロンドープダイヤモンド電極/水界面の電子状態をベースにした化学反応性、特にボロンドープ濃度依存性や表面終端依存性、に焦点をあて、第一原理分子動力学(DFT−MD)シミュレーションを用いて解析を行った[1,2]。

    researchmap

  • First-principles molecular dynamics study on water adsorption and interfacial water on TiO2 anatase/bulk water interfaces

    SUMITA, Masato, HU, Chunping, TATEYAMA, Yoshitaka

    NIMS International Workshop on Photocatalysis and Environmental  2010.2 

     More details

    Language:English  

    We carried out large-scale first-principles density-functional molecular dynamics simulations of TiO2 surfaces dipped in bulk water for the first time, using slab model with periodic boundary condition. BLYP generalized gradient corrected exchange-correlation functional, plane wave basis set up to the energy cutoff of 70 Ry with Troullier-Martin type norm-conserving pseudopotentials were used. Concerning molecular dynamics, we used Nos&eacute;-Hoover thermostat with the temperature of 300 K for NVT and time step of 5 a.u. (ca. 0.12 fsec).

    researchmap

  • DFT-MD Simulations Reveal Novel Mechanisms of Electrolyte and Electrode Interface in Li-Ion Battery

    TATEYAMA, Yoshitaka

    UNISTRA-NIMS Joint Seminar  2015.1 

     More details

    Language:English  

    The reductive decomposition of the electrolyte molecules plays a crucial role in the SEI formation. Slight change of the electrolyte component often exhibits a large impact on the SEI quality. However, the microscopic mechanisms in electrolyte and at electrode interface have not been fully understood yet. We have addressed such important issues by using the advanced DFT simulation techniques.

    researchmap

  • Interfacial water on TiO2 anatase (101) and (001) surfaces by first-principles molecular dynamics with TiO2 slabs dipped in bulk water

    TATEYAMA, Yoshitaka

    MANA International Symposium 2010  2010.3 

     More details

    Language:English  

    We carried out density-functional Car-Parrinello molecular dynamics simulations of the TiO2 surfaces dipped in bulk water using slab model with periodic boundary condition at room temperature. Our simulations show that all fivefold Ti atoms (Ti5c) on the (101) surface undergo molecular adsorption of water, and dissociative adsorption predominantly occurs on the (001) surface, which basically confirms the recent suggestion based on the calculations using multi-layer water models in Prof. Selloni group. However, we obtained more detailed information of interfacial water structure.

    researchmap

  • サブ課題B 研究事例「「京」を用いたリチウムイオン電池内機構の第一原理シミュレーション」

    館山 佳尚

    文部科学省 「エネルギーの高効率な創出,変換・貯蔵,利用の新規基  2015.3 

     More details

    Language:Japanese  

    「京」を用いたリチウムイオン電池内機構の第一原理シミュレーションについて紹介。

    researchmap

  • Additive effect on initial stage of solid electrolyte interphase (SEI) formation in lithium ion battery

    TATEYAMA, Yoshitaka

    248th ACS National Meeting & Exposition  2014.8 

     More details

    Language:English  

    Solid electrolyte interphase (SEI) formed through the reductive decomposition of electrolyte molecules plays a crucial role in the performance and stability of lithium-ion battery (LIB). Here we investigated the additive effects on the reductive decomposition, using a typical electrolyte system with ethylene carbonate (EC) solvent and vinylene carbonate (VC) additive.

    researchmap

  • 時間依存密度汎関数法による非断熱結合係数の計算手法:全電子・原子基底での実証研究

    胡 春平, 杉野修, 館山 佳尚

    第12回理論化学討論会  2009.5 

     More details

    Language:Japanese  

    断熱ポテンシャル面と非断熱結合係数(NAC)は、非断熱量子シミュレーションの2本柱である。空間サンプリング数は膨大であることから、従来の波動関数に基づく量子化学的手法よりも効率の良い計算手法が求められている。我々は時間依存密度汎関数法でNACの厳密な計算式を導出した。平面波擬ポテンシャル枠組みで精度を検証したところ、擬ポテンシャル近似を改良する必要があることがわかった。そのためにはNACの全電子計算手法を開発し、原子基底に基づき実証研究を行った。その場合、原子基底の原子座標依存性があることから、いわゆるPulay補正の項を考えなければならない。また、原子基底が通常直交していないので、原子基底で求められたNACの諸要素を正規直交基底にあらわに変換する必要がある。我々のNAC計算結果には量子化学手法CASSCFよりかなり良い精度でsum ruleが成り立つことがわかった。

    researchmap

  • スーパーコンピュータが先導する産学連携による材料開発〜リチウムイオン電池〜

    館山 佳尚, 奥野幸洋, 古屋和彦

    スーパーコンピュータ推進議員連盟総会  2014.8 

     More details

    Language:Japanese  

    私たちは高精度計算が可能な第一原理分子動力学法と化学反応の自由エネルギー計算手法を融合させた計算技術を世界で初めてLIBに適用し、典型的な電解液内での還元分解過程とSEI膜の素材となる重合過程を原子・分子レベルで明らかにしました。発見した反応機構はいまだに謎が多いLIBの電解液分解と SEI膜形成過程の理解を増進するものとなっています。

    researchmap

  • Ab initio MD study on redox reactions on semiconductor/water interface

    TATEYAMA, Yoshitaka

    The 8th Japan-France Workshop on Nanomaterials  2009.6 

     More details

    Language:English  

    In order to establish ab initio calculation techniques for such quantities, we have carried out extensive ab initio molecular dynamics (MD) for semiconductor/water interfaces and compared the results with the experimental one available. In the calculations, we adopt double face slab model for easy and straightforward control of water density. With the MD trajectories, we have calculated average features of water molecule distribution as well as electronic states, and found their dependence on the interface structure of the electrode.

    researchmap

  • Adsorption, Excitation and Charge Transfer of Black Dye at TiO2 Anatase/Acetonitrile Interface in DSC

    TATEYAMA, Yoshitaka, OTANI, Yusuke, AIKAWA, Koharu, HAN, Liyuan, SODEYAMA, Keitaro

    65th Annual Meeting of the International Society of Electrochemi  2014.8 

     More details

    Language:English  

    Although the organic-inorganic hybrid perovskites have emerged as solar cells with higher efficiency, the interfacial chemistry of conventional Ru dyes at TiO2 - acetonitrile interfaces in dye-sensitized solar cells (DSCs) is still an issue of fundamental importance. We then investigated stable structures and photoexcitation character of Black Dye (BD; Ru N749 dye) adsorption to TiO2 anatase (101) interface immersed in bulk acetonitrile (AN) solution, a most representative DSC system. Density functional theory based molecular dynamics (DFT-MD) with explicit solvent molecules was used to take into account the fluctuations of solvation shells and adsorbed molecules. We have also combined time-dependent DFT calculations of the excitation energies and oscillator strengths for the discussion o

    researchmap

  • Z-ペンタ-2,4-ジエニミニウムのhydrogen-out-of-plane motion先導による光異性化反応経路

    隅田 真人, 齋藤一弥, 館山 佳尚

    第3回分子科学討論会2009  2009.9 

     More details

    Language:Japanese  

    レチナールプロトン化シッフ塩基のモデル分子,ペンタ-2,4-ジエニミニウム (PDI)のZからEへの光異性化では,第一励起状態(S1)に光励起の後,中央の炭素骨格(C-C-C-Cの二面角)が大きく変化することによって,S1から基底状態(S0)へ遷移する事が理論的に主張されている.本研究では,MRMP2//CASSC計算によりポテンシャルエネルギー曲面を探索し,hydrogen-out-of-plane motion(HOOP: H-C-C-Hの二面角)が炭素骨格の変化よりも先行することによって,励起状態上での炭素骨格の大きな変化が無くとも,S1からS0への遷移が可能であることを報告する.

    researchmap

  • 電解質の計算物質科学:次世代蓄電池に向けて

    館山 佳尚

    触媒・電池元素戦略研究拠点 第5回公開シンポジウム  2014.10 

     More details

    Language:Japanese  

    1:イントロダクション 2:カーボネート電解液の添加剤効果の新機構 (Project A) 3:高濃度リチウム塩電解液の化学 (Project B) 4:固体電解質の界面抵抗起源 (Project C) 5:まとめ

    researchmap

  • 半導体電極/水溶液界面における酸化還元電位及び 電子移動反応の第一原理解析

    館山 佳尚, 渡辺剛志, 栄長泰明

    第3回分子科学討論会2009名古屋  2009.9 

     More details

    Language:Japanese  

    触媒、燃料電池、太陽電池などの効率向上を目指した研究は数多く行われているものの、その最もキーとなる電極/電解質溶液界面における酸化還元・電子移動反応の詳細については、まだ不明な点が数多く残されている。真空表面に比べ固液界面における電子・原子スケールでの観測が難しいことがその大きな要因で、その困難を乗り越えるべく元来電子・原子を取り扱ってきた第一原理計算からの理論的アプローチが待望されている。本研究ではその一つの方向性を実証することを目的とする。

    researchmap

  • 「リチウムイオン電池」 〜高性能化と高安全性の両立に向けた取り組み〜

    館山 佳尚

    “「京」で革新するエネルギー創成”記者勉強会  2014.10 

     More details

    Language:Japanese  

    私たちは高精度計算が可能な第一原理分子動力学法と化学反応の自由エネルギー計算手法を融合させた計算技術を世界で初めてLIBに適用し、典型的な電解液内での還元分解過程とSEI膜の素材となる重合過程を原子・分子レベルで明らかにしました。発見した反応機構はいまだに謎が多いLIBの電解液分解と SEI膜形成過程の理解を増進するものとなっています。

    researchmap

  • Excited-State Dynamics of Spin-Polarized Systems by Time-Dependent Density Functional Theory (TDDFT)

    胡 春平, 宮本良之, 館山 佳尚

    日本物理学会2009年秋季大会  2009.9 

     More details

    Language:Japanese  

    時間依存密度汎関数法(TDDFT)は電子励起ダイナミクスを第一原理的にかつ効率的に記述する手法として注目を浴びている。しかし、これまでのTDDFTによる電子励起ダイナミクスの研究はsinglet励起を対象としspin-unpolarized系で取り扱うというものがほとんどであった。一方実在系においては光学活性を持つ開殻分子(ラジカル)や電荷を加えられた閉殻分子などのspin-polarized系におけるtripletやdoublet励起も光化学反応の重要な過程となっている。そのメカニズム解明や光誘起スピン制御の模索するためには、スピンのあらわな取り扱いが必要不可欠となっている。そのため、我々は実時間発展TDDFTプログラムFPSEIDのspin-polarized系に対する拡張を行った。さらに、典型的な分子に応用してFranck-Condon励起状態からのダイナミクスを計算した。

    researchmap

  • Adsorption, Excitation and Charge Transfer of Black Dye at TiO2 Anatase/Acetonitrile Interface in DSC

    館山 佳尚, 大谷 優介, 相川 小春, 韓 礼元, 袖山 慶太郎

    計算分子科学研究拠点 第5回研究会  2014.10 

     More details

    Language:Japanese  

    Interfacial chemistry of conventional Ru dyes at TiO2 - acetonitrile interfaces in dye-sensitized solar cells (DSCs) is still an issue of fundamental importance. We then investigated stable structures and photoexcitation character of Black Dye (BD; Ru N749 dye) adsorption to TiO2 anatase (101) interface immersed in bulk acetonitrile (AN) solution, a most representative DSC system. Density functional theory based molecular dynamics (DFT-MD) with explicit solvent molecules was used to take into account the fluctuations of solvation shells and adsorbed molecules. We have also combined time-dependent DFT calculations of the excitation energies and oscillator strengths for the discussion of the level alignment associated with the interfacial electron transfer.

    researchmap

  • Ab-initio double-face slab model for redox reactions on solid/solution interfaces

    館山 佳尚, 渡辺剛志, 栄長泰明

    日本物理学会2009年秋季大会  2009.9 

     More details

    Language:Japanese  

    電池や触媒において最も重要な過程は電極/溶液界面における電子移動反応・酸化還元反応である。物質合成を目的としたバイアス印加反応に対して、エネルギー抽出・抑制に焦点をあてたゼロバイアスでの現象も数多く存在する。本研究はこのゼロバイアス下において、固液界面の酸化還元反応を特徴づける物理量を第一原理分子動力学計算から求めることを試みた。

    researchmap

  • Nonadiabatic couplings from time-dependent density functional theory: Pseudopotential and all-electron schemes

    HU, Chunping, SUGINO Osamu, TATEYAMA, Yoshitaka

    GRC: Time-Dependent Density-Functional Theory  2009.7 

     More details

    Language:English  

    Nonadiabatic couplings (NACs) are of central quantity in nonadiabatic processes. Recently we presented a rigorous formula to calculate NACs between the ground and excited states of molecules, using time-dependent density functional theory. Implemented in the plane wave pseudopotential framework, it has been confirmed that our formalism can efficiently calculate NACs near various types of intersections of potential energy surfaces. On the other hand, it was found that the pseudopotential approximation might give inaccurate results for some NACs components on nonhydrogen atoms. Therefore, we have carried out all-electron calculation using atomic orbital basis sets. The results show that the sum rule is well satisfied and good accuracy can be achieved.

    researchmap

  • DFT-MD Simulations Reveal Novel Reaction Mechanisms of Electrolyte toward SEI formation in LIB

    TATEYAMA, Yoshitaka

    The 3rd TYC Energy Materials Workshop  2014.9 

     More details

    Language:English  

    We have addressed such important issues by using the advanced DFT simulation techniques. We carried out DFT-MD free energy calculations of the reductive decompositions of the carbonate-based electrolytes on the K computer, focusing on the thermodynamics as well as the kinetics. The reaction mechanisms in a novel type of superconcentrated electrolytes were examined with the same techniques as well. We then succeeded in theoretically elucidating the reductive reaction mechanisms of the electrolyte molecules for the first time. Recently, we have also investigated the Li-ion behavior at oxide cathode/solid electrolyte interfaces and the effect of the buffer layers. These new findings will contribute to the development of LIBs with higher performance and better safety.

    researchmap

  • Preparation and Optical Properties of Fullerene/Ferrocene Hybrid Hexagonal Nanosheets

    若原 孝次, マラパン サティス, 宮澤 薫一, 胡 春平, 館山 佳尚, 根本 善弘, 佐々木 敏雄, 伊藤攻

    第37回フラーレン・ナノチューブ総合シンポジウム  2009.9 

     More details

    Language:Japanese  

    We herein report a simple method for the preparation of C60/Fc hybrid nanowhiskers and hexagonal nanosheets by a liquid-liquid interfacial precipitation (LLIP) method. The highly crystallized C60/ferrocene hexagonal nanosheets had the formulation C60(ferrocene)2. A strong charge-transfer (CT) band between ferrocene and C60 was observed at 782 nm, indicating the presence of donor-acceptor interaction in the nanosheets. Upon heating the nanosheets to 150 &#61616;C, the CT band disappeared due to the sublimation of ferrocene from the C60/ferrocene hybrid, and C60 nanosheets with an fcc crystal structure and the same shape and size as the C60/ferrocene nanosheets were obtained.

    researchmap

  • Theoretical Study on Reactions in Electrolyte and at Electrode-Electrolyte Interface in Lithium Ion Battery

    TATEYAMA, Yoshitaka

    The 10th Japan-France Joint Seminar on Battery  2014.9 

     More details

    Language:English  

    We have investigated microscopic issues related to electrolytes and electrode-electrolyte interfaces in LIBs, by using advanced DFT simulation techniques such as molecular dynamics sampling, blue-moon ensemble and DFT+U framework on supercomputers including the K computer. We theoretically elucidated the reductive reaction mechanisms of the molecules in the EC/VC electrolyte and the acetonitrile solvent with super-concentrated Li-salts, toward the SEI formation. We also clarified the Li-ion behavior at oxide cathode/sulfide electrolyte interfaces and the effect of the buffer layers in a typical all-solid-state LIB. These atomistic understandings will contribute to the further improvement of the secondary battery technology.

    researchmap

  • Photoexcited Electron-Ion Dynamics within Time-Dependent Density Functional Theory

    HU, Chunping, MIYAMOTO Yoshiyuki, TATEYAMA, Yoshitaka

    ChinaNANO 2009  2009.9 

     More details

    Language:English  

    First principles calculation based on density functional theory (DFT) has become a main technique for the modeling and simulation of nanostructures at the atomistic level. For the investigation of excited-state dynamics in nano-systems, time-dependent DFT (TDDFT) with the real-time propagation (RTP) technique is most promising. However, previous work on this aspect is still rather limited, and lacks the control of spin. Also, nonadiabatic effects near the crossing points of potential energy surfaces are yet to be taken into account. Bearing this in mind, we have recently extended the TDDFT-RTP program package FPSEID to treat spin-polarized systems and make validations for TDDFT-RTP applications to nonadiabatic processes involved in photoexcited electron-ion dynamics.

    researchmap

  • 第一原理MDを用いた電池・触媒界面状態および反応のオペランド解析

    館山 佳尚

    放射光学会第7回若手研究会:最先端オペランド観測で明らかになる物  2014.9 

     More details

    Language:Japanese  

    界面酸化還元過程を最初から最後まで高精度にシミュレーションすることは、余りに複雑過ぎて現状では不可能です。しかし今後のハイパフォーマンスコンピューティング(「京」や「ポスト京」)の発展を見据えて計算手法を整備して行くとともに、個々の過程について理解を深めて行くことは重要であると考えられます。このようなコンセプトから、我々は色素増感・ペロブスカイト太陽電池、リチウムイオン電池、燃料電池、光触媒、電極触媒の固液界面状態および反応の第一原理分子動力学(MD)サンプリングを主に用いた理論解析にここ数年取り組んできました。本講演ではそれらについてご紹介します。

    researchmap

  • Molecular nanowiring using single conductive polymers

    大川 祐司, マンダル スワパン クマー, 長谷川 剛, 塚本 茂, 胡 春平, 館山 佳尚, ヒル ジョナサン, 有賀 克彦, 青野 正和

    第58回高分子討論会  2009.9 

     More details

    Language:Japanese  

    走査トンネル顕微鏡探針を用いたジアセチレン化合物の連鎖重合反応のナノスケール制御と、基板上の単一ポリジアセチレンの構造、およびこれを利用した機能性有機分子への単一分子配線について議論する。

    researchmap

  • 次世代二次電池システムの理論計算設計

    館山 佳尚

    第3回TCCIインフォーマルミーティング  2014.10 

     More details

    Language:Japanese  

    二次電池は電極、電解液(質)およびそれらの界面で構成されており、それらの中で電子輸送およびイオン輸送の両者が行われている。このような系を取り扱うには、凝縮系や表面界面系に適したDFT電子状態計算手法、さらに古典力場や連続体モデル等の併用が必要不可欠である。また電圧印加といった充放電環境の再現も必要となってくる。本課題では「京」重点課題「エネルギー変換の界面科学」で開発してきた凝縮系向けの計算コードをベースにポスト「京」での応用計算実行を目指した更なるプログラム開発・最適化を行い、最終的には古典力場や連続対近似も組み合わせて電池を丸ごと考慮した二次電池シミュレータの構築などにも取り組む。それと同時に、すでに緊急の課題である、電極ー電解液界面被膜(SEI膜)の微視的機構、金属負極の問題、電極材料や電解液組成の最適化および全固体・空気電池の反応メカニズムなどについても解明を進めて行く。

    researchmap

  • DFT-MD study of additive effects on reductive decomposition of carbonate-based solvent toward solid electrolyte interphase formation

    SODEYAMA, Keitaro, USHIROGATA, Keisuke, OKUNO, Yukihiro, TATEYAMA, Yoshitaka

    224th ECS Meeting  2013.10 

     More details

    Language:English  

    We focused on the thermodynamics as well as the kinetics of the possible processes. We used density functional theory-based molecular dynamics (DFT-MD) with explicit solvent molecules at finite temperature for sampling of the equilibrium properties and carried out the free energy calculations of the reactions with the Blue-Moon Ensemble technique. We considered Li+ in only EC solvent (EC system) and in EC solvent with a VC additive (EC/VC system) to elucidate the additive effect. For the decomposition kinetics, we evaluated the free energy change along reaction pathways of EC or VC under one electron and two electron reduction conditions.

    researchmap

  • 固液界面酸化還元反応の理論的反応設計技術の構築1

    館山 佳尚

    JSTさきがけ研究領域「界面の構造と制御」第3回領域会議  2008.1 

     More details

    Language:Japanese  

    私の研究課題「固液界面酸化還元反応の理論的反応設計技術の構築」の研究構想説明。

    researchmap

  • 酸化還元・固液界面反応計算手法開発と触媒・電池への応用 〜計算電気化学の構築に向けて〜

    館山 佳尚

    応用化学科談話会  2013.10 

     More details

    Language:Japanese  

    1:イントロ DFTと電気化学2:酸化還元・電子移動反応の理論計算手法の開発・確立3:固液界面計算手法+触媒・電池への応用例

    researchmap

  • 第一原理計算から見た鉄中の水素ー空孔・欠陥相互作用

    館山 佳尚

    「水素脆化研究の基盤構築」フォーラム  2008.3 

     More details

    Language:Japanese  

    鉄鋼材料の水素脆性破壊の微視的メカニズムを最終目標に行われた鉄ー水素ー空孔・欠陥系に関する一連の第一原理計算の紹介およびその結果から導きだされる有望メカニズムの紹介。

    researchmap

  • Development of ab-initio free energy calculation method for bond breaking/formation coupled to electron transfer

    館山 佳尚

    「次世代ナノ情報機能・材料」成果報告会  2007.7 

     More details

    Language:Japanese  

    我々は酸化還元反応の記述に向けた新しい第一原理自由エネルギー計算手法の開発・実証に取り組んできた。その中で最近、電子移動を伴う化学結合切断/形成反応(例えば A + B + e- --&gt; AB-)の反応・活性化自由エネルギー計算を可能にする「第一原理拘束MDエネルギーギャップ法」を開発した。

    researchmap

  • Investigation of Electronic States of Boron-Doped Diamond Surfaces by DFT

    FUTERA, Zdenek, Yasuaki Einaga, TATEYAMA, Yoshitaka

    2013 JSAP-MRS Joint Symposium  2013.9 

     More details

    Language:English  

    In this work we are presenting electronic states of BDD calculated under several different conditions. We explored B doping effect, surface termination effect and water interface structure.

    researchmap

  • Density-functional constrained molecular dynamics energy gap (DF-CMD-EG) method for free energy calculation of chemical reaction coupled to electron transfer

    TATEYAMA, Yoshitaka

    FADFT2007  2007.8 

     More details

    Language:English  

    We have applied this DF-CMD-EG method to a water cleavage reaction coupled to electrontransfer on a transition metal oxide ion in aqueous solution and demonstrated that it can wellreproduce experimental reaction free energy.

    researchmap

  • 第一原理MDによるボロンドープダイヤモンド電極/水溶液界面の電子状態と反応性解析A

    館山 佳尚, フテラ ズデニェク, 渡辺剛志, 栄長泰明

    第112回触媒討論会  2013.9 

     More details

    Language:Japanese  

    化学的安定性と電気伝導性を兼ね備えたボロンドープダイヤモンドは水質浄化等に向けた新規な電極触媒として着目されている。本研究では、動作環境下におけるボロンドープダイヤモンド/水界面の電子状態や反応性について、第一原理分子動力学(MD)シミュレーションを実行し、その微視的メカニズムの解明を試みた。その結果は炭素電極一般に関する知見も与えるものとなっている。

    researchmap

  • Water addition along with reduction of aqueous ruthenium complexes by ab initio free energy calculation method for bond breaking/formation coupled to electron transfer

    TATEYAMA, Yoshitaka, Jochen Blumberger, OHNO, Takahisa, Michiel Sprik

    American Chemical Society 234th national meeting & exposition  2007.8 

     More details

    Language:English  

    We have developed a DFT-based ab initio free energy calculation method for change of chemical bonds coupled to electron transfer by combining constrained molecular dynamics with the energy gap method for redox free energy. The formulation is derived based on the thermodynamic integration scheme, thus quite general. We have also suggested a special way to choose an efficient scalar constraint for reactions with multiple relevant reaction coordinates.

    researchmap

  • CYCLODEXTRIN-CROSSLINKED ALGINATE GEL FOR MECHNICALLY-CONTROLLED DRUG DELIVERY SYSTEM

    KAWAKAMI, Kohsaku, IZAWA, Hironori, SUMITA, Masato, TATEYAMA, Yoshitaka, HILL, Jonathan, ARIGA, Katsuhiko

    3rd Conference on Innovation in Drug Delivery  2013.9 

     More details

    Language:English  

    A mechanically-controlled drug delivery system with Cyclodextrin (CyD) -crosslinked alginate (AL), CCAL, composed of a CyD derivative junction point with AL as a main chain polymer, is introduced.

    researchmap

  • 酸化還元反応に対するab initio自由エネルギー計算手法の開発

    館山 佳尚, Jochen Blumberger, 大野 隆央, Michiel Sprik

    第一回分子科学討論会  2007.9 

     More details

    Language:Japanese  

    電子移動を伴う化学結合の開裂/形成反応、いわゆる酸化還元反応はエネルギー・環境問題に関連する多くの問題のキープロセスである。しかしそれらの自由エネルギーを計算できるab initio計算手法はこれまでなかった。本研究では熱力学積分法を出発点としMarcus energy gap法およびBlue-moon統計などを用いることにより電子移動と化学結合変化を同時に取り扱える新しいab initio自由エネルギー計算手法を開発した。さらに水溶液中の遷移金属酸化物イオンによる「水分解」反応に適用し、精度実証をするとともにプロトン移動機構などの反応メカニズムを明らかにした。それらについて報告する。

    researchmap

  • DFT-MD自由エネルギー計算による リチウムイオン電池電解液・添加剤の還元反応解析

    館山 佳尚, 袖山 慶太郎, 後瀉 敬介, 奥野 幸洋

    第7回分子科学討論会2013  2013.9 

     More details

    Language:Japanese  

    本研究では、顕に溶媒のダイナミクスを考慮した自由エネルギーに基づく平衡状態および反応自由エネルギー解析を行い、ECやVCの還元後の反応過程を明らかにし、SEI形成におけるVCの役割について知見を得ることを目的とした。

    researchmap

  • 色素増感太陽電池電極アナターゼTiO2 (101)/ アセトニトリル界面における水分子の影響

    隅田 真人, 袖山 慶太郎, 館山 佳尚

    日本物理学会秋季大会  2012.9 

     More details

    Language:Japanese  

    本研究では,アナターゼナノ粒子で最も大面積を占める(101)面/MeCN 界面に混入した水分子の影響を、DFT分子動力学計算を用いた構造・電子状態サンプリングを用いて調べた。

    researchmap

  • TDDFTの実時間発展形式を用いた分子系の光励起状態の電子ー核ダイナミクス

    館山 佳尚, 小山 紀久, 大野 隆央, 宮本良之

    分子構造総合討論会2006  2006.9 

     More details

    Language:Japanese  

    電子ー原子核ダイナミクスに向けて我々が開発・導入したRTP-TDDFTベースの手法・技術について紹介し、さらに固体ベンゼンの光誘起環開裂への適用による実証計算について報告する。

    researchmap

  • 第一原理計算によるTiO2/H2O界面の原子スケール解析

    館山 佳尚

    第110回触媒討論会  2012.9 

     More details

    Language:Japanese  

    第一原理DFT分子動力学(MD)サンプリングを用いて、光触媒系TiO2 /水界面の室温平衡下における構造および電子的性質を原子・電子スケールから明らかにした。アナターゼ型構造の表面に対し、バルク水の存在下における表面欠陥・再構成の安定性、表面への水分子吸着および界面における水素結合様式について微視的知見を得た。さらに反応理解の鍵となる電子状態の解析も行った。

    researchmap

  • Ab initio molecular dynamics study on free energies of electron and proton transfers in aqueous solution

    館山 佳尚

    第5回水素量子アトミクス研究会  2007.1 

     More details

    Language:Japanese  

    我々は酸化還元反応の定量的記述に向けた新しい第一原理自由エネルギー計算手法の開発に取り組み、これまでに幾つかの手法について実証に成功した。本講演では電子移動を伴う化学反応(例えば A + B + e- --&gt; AB-)に向けて最近開発したBlue moon ensemble法を用いた計算手法について簡単に紹介する。

    researchmap

  • DFT-MD study on TiO2/solution interfaces under equilibrium in photocatalysis and dye-sensitised solar cell

    TATEYAMA, Yoshitaka

    HAYASHI CONFERENCE  2013.7 

     More details

    Language:English  

    We have been exploring possible interfacial structures and electronic states of TiO2/liquid water interfaces for PC and TiO2/liquid acetonitrile for DSC under thermal equilibrium, by using density functional theory based molecular dynamics (DFTMD) analysis with the explicit solvent molecules. Recently, we have also addressed to analyze the redox reaction ability at the PC interfaces as well as a role of redox mediators in the DSSC systems, with some novel computational techniques.

    researchmap

  • Free energy computation of reaction with change of chemical bonds coupled to electron transfer

    TATEYAMA, Yoshitaka

    Friday seminar, Centre for Computational Chemistry  2007.1 

     More details

    Language:English  

    Reactions with electron transfer in solution, so called “redox reactions”, play crucial roles in a lot of interesting phenomena such as battery, fuel cell, catalysis, corrosion, photosynthesis. Fundamental quantities of redox reactions (redox potential, rate constant, current density etc.) are usually described by free energies. Therefore, computational methods that can quantitatively deal with free energy difference are quite desirable. On this issue, we have recently developed some new first-principles molecular dynamics (FPMD) techniques. Among them, we introduce the technique using the constrained FPMD method for quantitative discussion of electron transfer reactions with bond cleavage/formation.

    researchmap

  • Hydrogen-Enhanced Vacancy Embrittlement of Grain Boundaries in Iron: First-Principles Calculations

    H. Momida, Y. Asari, NAKAMURA, Yoshimichi, TATEYAMA, Yoshitaka, OHNO, Takahisa

    ISAM4-2013  2013.7 

     More details

    Language:English  

    We have investigated vacancy-related mechanism that reduces grain-boundary strengths which are enhanced by hydrogen. Calculated results show that hydrogen stabilizes vacancies at grain boundaries, and the defects reduce the local tensile strengths of the grain boundaries. This deleterious effect is much worse than when interstitial hydrogen is trapped at grain boundaries without vacancies. Atomistic fracture behaviors associated with electronic bond breakings under static tensile loads can explain characters of the strength changes induced by the defects. The vacancy-related hydrogen embrittlement mechanism may account for slowly developing damage inside a material due to the slow mobility of vacancies.

    researchmap

  • 実時間発展TDDFTによる分子系光励起状態の電子ー核ダイナミクス

    館山 佳尚, 小山 紀久, 大野 隆央, 宮本良之

    次世代ナノ統合シミュレーションソフトウェアの研究開発第1回公開シ  2007.3 

     More details

    Language:Japanese  

    視物質内タンパクの光化学反応、光駆動スイッチなど光励起ダイナミクスが絡んだ現象は大変注目を集めている。近年のレーザー技術の進展により光励起後の過渡状態スペクトルが観測可能になり、光励起ダイナミクスの理解が大きく前進した。しかし観測スペクトル(振動数)から電子・原子核ダイナミクスを翻訳するには、まだ様々な不確定要素が絡み困難な場合も多い。そこで我々は量子力学の基本方程式から出発したTDDFT実時間発展形式を用いて電子・原子核の動きを直接かつ定量的に追跡することに取り組んだ。本講演ではその理論・計算手法について述べた後、その実証計算として行った光励起開環反応の結果について紹介する。

    researchmap

  • エネルギー問題に対する計算物質科学

    館山 佳尚

    CMSI 第1部会「新物質・新量子相の基礎科学」 夏の学校 2013  2013.8 

     More details

    Language:Japanese  

    +酸化還元・電子移動反応の第一原理自由エネルギー計算(基礎)+エネルギー・環境問題に関連する固液界面現象の第一原理分子動力学解析(応用)

    researchmap

  • 励起状態グラファイトのE2gフォノンに関する理論的研究

    籾田 浩義, 館山 佳尚, 大野 隆央

    日本物理学会2007年春季大会  2007.3 

     More details

    Language:Japanese  

    最近、ポンプ・プローブ法によってグラファイトのコヒーレントフォノンが観測され、高密度の電子励起に対してE2g振動数領域に2つの振動数ピークが存在することが報告されている。この2つのピークの起源を明らかにするために第一原理計算に基づいた理論的研究を行った。励起キャリアの緩和過程を考慮して計算したエネルギー曲面をもちいて、励起状態グラファイトのE2gフォノンに関する議論を行う。

    researchmap

  • Car-Parrinello MD and blue-moon ensemble study on reductive decomposition of carbonate-based solvent in lithium ion battery

    TATEYAMA, Yoshitaka, USHIROGATA, Keisuke, SODEYAMA, Keitaro, Yukihiro Okuno

    CPMD2013  2013.9 

     More details

    Language:English  

    Solid electrolyte interphase (SEI) on the electrode - electrolyte interfaces formed through the reductive decomposition of organic solvent molecules plays a crucial role in the stability and capability of lithium ion battery (LIB). Additives to the electrolyte often exhibit a large impact on the SEI quality. A typical example is vinylene carbonate (VC) additive to the ethylene carbonate (EC) solvent (See Figure). Here we investigated the effects of VC additive to the EC solvent on the reductive decomposition and the initial stage of SEI formation. We focused on the thermodynamics as well as the kinetics of the possible processes. We used DFT-based Car-Parrinello MD with explicit solvent molecules for the equilibrium properties, and carried out the free energy profile calculation.

    researchmap

  • First-principles MD techniques for free energy analysis of redox reactions in solution

    TATEYAMA, Yoshitaka

    Tne 9th Asian Workshop on First-Principles Electronic Structure  2006.11 

     More details

    Language:English  

    溶液中の電子・プロトン移動反応すなわち酸化還元反応は多くの興味深い現象ー燃料電池、電気分解、触媒、光合成ーの重要な素過程となっている。これらの反応の基本的な物理量は原理的にGibbs/Helmholtz自由エネルギーで記述される。従って電子数が一定で、内部(全)エネルギーを対象とする従来の第一原理計算では原理的に取扱いが困難であった。そこで我々は酸化還元反応の記述に向けた新しい第一原理自由エネルギー計算手法の開発・実証に取り組んだ。本講演では電子移動を伴う化学反応(例えば A + B + e- --&gt; AB-)に向けて最近開発したBlue moon ensembleを用いた手法について説明した後、遷移金属錯体イオンによる水解離反応に適用した例を紹介する。

    researchmap

  • Development of cyclodextrin-based functional polymeric excipients towards patient-friendly drug delivery systems

    川上 亘作, 井澤 浩則, 大門 裕貴, 隅田 真人, 館山 佳尚, 酒井秀樹, 阿部正彦, ヒル ジョナサン, 有賀 克彦

    10th Japan-Korea Symposium on Materials & Interface  2012.11 

     More details

    Language:Japanese  

    Drug molecules can be delivered into human bodies via various routes. Although the oral administration is the most convenient route, other routes are also employed depending on characteristics of drug molecules and diseases. Friendliness to patients is one of the important factors for establishing the administration methodology, because it may significantly influence patient’s compliance. In this presentation, our attempts to develop novel functional polymers that can be used for patient-friendly drug delivery systems.

    researchmap

  • Coherent Phonon in Graphite under High-Density Photoexcitation

    MOMIDA, Hiroyoshi, TATEYAMA, Yoshitaka, OHNO, Takahisa

    International Conference on Quantum Simulators and Design  2006.12 

     More details

    Language:English  

    We have investigated the effects of high density photo-excitation on the potential surface in graphite by using the first-principles electronic structure calculations, and examined possible reason for two peaks of the phonon frequencies observed by Ishioka et al. by using the ultra-fast pump-probe reflectivity measurements. Calculated results indicate a symmetry lowering of the structure and/or an anharmonicity of the potential energy surface, showing that the results possibly account for observed two-peaks structure.

    researchmap

  • 固液界面の酸化還元過程に関する第一原理計算解析

    館山 佳尚

    表面科学学術講演会  2012.11 

     More details

    Language:Japanese  

    近年、(光)触媒、(太陽・燃料・二次)電池の研究が精力的に進められているが、エネルギー生成や分解・合成反応の主要な場である固液界面の原子・電子スケールでの理解はまだ確立したとは言いがたい。このような問題に対して量子力学理論をベースとした計算(DFT計算)を用いて理解を進めようという試みが最近出始めてきている。しかしながら、量子力学的描像と長い歴史を持つ電気化学的概念にはまだズレが存在し統一的な理解には至っていない。そこで私たちはDFT分子動力学(MD)法による酸化還元過程の定量的な取扱いの確立を通して、この不一致を解消しようと取り組んでいる。その実証系として調べた TiO2電極界面が含まれる光触媒系・色素増感太陽電池系の第一原理計算解析について報告する。

    researchmap

  • First-principles MD techniques for free energy analysis of chemical reactions with electron transfer in solution

    TATEYAMA, Yoshitaka, Jochen Blumberger, OHNO, Takahisa, Michiel Sprik

    International Conference on Quantum Simulators and Design  2006.12 

     More details

    Language:English  

    Reactions with electron transfer in solution, so called “redox reactions”, play crucial roles in a lot of interesting phenomena such as battery, fuel cell, catalysis, corrosion, photosynthesis. Fundamental quantities of redox reactions (redox potential, rate constant, current density etc.) are usually described by free energies. Therefore, computational methods that can quantitatively deal with free energy difference are quite desirable. On this issue, we have recently developed some new first-principles molecular dynamics (FPMD) techniques. Among them, we introduce the technique using the constrained FPMD method for quantitative discussion of electron transfer reactions with bond cleavage/formation.

    researchmap

  • アナターゼTiO2(101)表面に吸着したアセトニトリル分子の電子状態

    隅田 真人, 袖山 慶太郎, 城野亮太, 館山 佳尚

    物性研究所共同利用スパコン合同研究会「計算物性物理学の新展開」  2013.1 

     More details

    Language:Japanese  

    アナターゼTiO2 (101)/アセトニトリル (MeCN) 溶媒の界面は色素増感太陽電池(DSSC)の化学的メカニズムを理解する上で重要な系である.ここでは,アナターゼTiO2 (101)表面に吸着したMeCN一分子の詳細な電子状態を,ハイブリッド交換相関関数を用いた密度汎関数法で解析した.この結果によるとMeCNの7a1軌道が吸着によってもっとも大きく変化している軌道であり,NA(MeCNの窒素原子)の直下であるTi5C (五配位のTi)では無く,O3C (三配位O)と結合性軌道を形成している.この吸着MeCNの電子状態はMeCNの吸着構造と被覆率に大きく関わっていると思われる.

    researchmap

  • 溶液中の酸化還元反応の自由エネルギー解析に向けた第一原理MD手法の開発

    館山 佳尚

    物性研究所短期研究会「計算物性科学におけるスーパーコンピュータ利  2006.12 

     More details

    Language:Japanese  

    酸化還元反応は燃料電池、光触媒、光合成をはじめとする多くの興味深い現象の素過程である。このような酸化還元反応の基本的物理量である様々な種類の自由エネルギーを密度汎関数理論ベースの分子動力学を用いて計算する手法の開発及び実証を行った。

    researchmap

  • 患者自身が押す力で薬物放出を制御するインプラント型ゲル製剤

    川上 亘作, 井澤 浩則, 隅田 真人, 館山 佳尚, ヒル ジョナサン, 有賀 克彦

    第29回日本DDS学会  2013.7 

     More details

    Language:Japanese  

    光・磁場・熱などの外部刺激に反応して薬物を放出する担体は広く検討されているが、これらの利用には特殊機器が必要となる。本研究では、患者自身が手で与えるマクロな力でホストーゲスト相互作用を制御し、薬物投与を行うDDSを提案する。

    researchmap

  • New ab initio method for free energy calculation of the reaction with bond change coupled to electron transfer

    館山 佳尚, 大野 隆央, Jochen Blumberger, Michiel Sprik

    日本物理学会2007年春季大会  2007.3 

     More details

    Language:Japanese  

    酸化還元反応は燃料電池、光触媒、光合成をはじめとする多くの興味深い現象の素過程である。その多くが電子移動を伴う結合開裂・形成反応とみなすことできる。我々はこれまで電子移動反応のみに対する第一原理自由エネルギー計算手法を開発してきた。本研究ではそれを拡張し電子移動を伴う結合開裂・形成反応に適用可能なより一般的な自由エネルギー計算手法の開発を世界で初めて行った。

    researchmap

  • QM/MM Study of Piano-Stool Ru(II) Complexes Interacting with DNA

    フテラ ズデニェク, 館山 佳尚, Jaroslav V. Burda

    4th Annual Meeting of Japan Society for Molecular Science (2010)  2010.9 

     More details

    Language:Japanese  

    Piano-stool Ru(II) complexes is a group of biologically active compounds with promising anti-cancer activity. Their interaction with DNA is known from experimental measurements but the exact reaction mechanism is not well described yet. QM/MM computational methodology is applied to study hydration and consequent binding of [(benzene)Ru(II)(en)Cl]+ complex to DNA. Structure as well as electronic properties will be presented.

    researchmap

  • 金属-CeO2表面系における水吸着・解離に関する第一原理計算研究

    館山 佳尚, サボバ ルチエ, Stefano Fabris

    第116回触媒討論会  2015.9 

     More details

    Language:Japanese  

    水性ガスシフト反応やCO酸化反応の素過程理解を目標に、金属−CeO2系表面界面の水吸着・解離について電子相関を考慮した第一原理計算研究を実行した。今回Cuに担持されたCeO2薄膜モデル系を取り扱いCeO2表面上の水吸着・分解に関する反応サイト依存性を計算した。さらに金属とCeO2の間の電荷移動と反応サイトの相関について議論した。

    researchmap

  • TiO2/H2O界面における吸着構造、水素結合および酸化還元能

    館山 佳尚

    グリーンイノベーションのための表面・界面化学/分子研研究会  2010.10 

     More details

    Language:Japanese  

    We investigated structural and electronic properties of the TiO2 anatase (101) and (001) surfaces dipped in water by first-principles density-functional molecular dynamics simulations, aiming at understanding the microscopic mechanism of photocatalytic reactions on the TiO2 interfaces. In contrast to the previous studies with only a few layers of H2O molecules on vacuum TiO2 surfaces, we used supercells involving bulk water on the TiO2 slabs and found some characteristics in the presence of bulk water. Our results indicate a two-layer model for interfacial water molecules on the TiO2 surfaces.

    researchmap

  • 固液界面酸化還元反応の第一原理計算解析

    館山 佳尚

    電気化学界面シミュレーションコンソーシアム  2015.9 

     More details

    Language:Japanese  

    DFT計算の基礎を復習した後、固液界面・酸化還元・電気化学反応を取り扱うための理論的拡張を説明する。さらに京コンピュータ等を用いた二次電池、太陽電池、光触媒などの微視的機構解明について解説する。

    researchmap

  • TiO2/H2O界面における吸着構造、水素結合および酸化還元能

    館山 佳尚

    第8回水素量子アトミクス研究会  2010.10 

     More details

    Language:Japanese  

    環境・エネルギー問題に関連する化学反応のほとんどが酸化還元反応(電子移動反応)といっても過言ではないでしょう。さらに触媒、電池系ではその反応の多くが固液界面で起こります。この「固液界面での酸化還元反応」の電子・原子レベルからの理解はまだ完全にはほど遠い状態です。このような状況を理論計算側から解明すべく、我々は様々な酸化還元反応に対する第一原理分子動力学(MD)計算手法の開発・確立を行い、溶液系・固液界面系を用いて実証してきました。本講演では最近の題材を含めて、その一端を紹介したいと思います。

    researchmap

  • DFT-MD Study on Formation Processes of Solid Electrolyte Interphase at Negative Electrode Interfaces in Lithium-Ion Battery

    TATEYAMA, Yoshitaka

    The 66th Annual Meeting of the International Society of Electroc  2015.10 

     More details

    Language:English  

    It is well known that most of those properties are governed by the quality of solid electrolyte interphase (SEI) film formed on the interface between negative electrode and organic electrolyte. However, the reaction mechanisms around electrolyte-electrode interfaces have not been fully understood yet on the atomic scale due to the difficulty in experimental in-situ observation. Then, we have addressed such unresolved issues by using DFT-MD sampling with sufficient accuracy

    researchmap

  • Wiring a single functional molecule by using conductive linear polymers

    OKAWA, Yuji, MANDAL, Swapan, Kumar, HU, Chunping, TATEYAMA, Yoshitaka, GOEDECKER Stefan, TSUKAMOTO, Shigeru, HASEGAWA, Tsuyoshi, AONO, Masakazu

    ElecMol10  2010.12 

     More details

    Language:English  

    We propose and demonstrate a novel method for connecting conductive polymers to a single functional molecule. Chain polymerization was initiated by applying a pulsed bias voltage to the row of diacetylene molecules to which a phthalocyanine pentamer is adsorbed, and the resulting polydiacetylene chain was connected to the phthalocyanine molecule. Similarly, we succeeded in connecting two polydiacetylene chains to the same phthalocyanine molecule. The method developed in the present study will represent a key step in realizing future single-molecule devices.

    researchmap

  • 第一原理計算に基づく表面・界面の計算科学

    館山 佳尚

    関西接着ワークショップ 2015年度 第2回研究会  2015.10 

     More details

    Language:Japanese  

    界面に対する定量的計算手法を説明し、応用例としてTiO2/H2O界面の構造および電子状態、リチウムイオン電池負極ー有機電解液界面の微視的現象を紹介する。

    researchmap

  • A novel Double-QM/MM method for donor-acceptor electron transfer in solution

    TATEYAMA, Yoshitaka, FUTERA, Zdenek, SODEYAMA, Keitaro

    Psi-k 2015 Conference  2015.9 

     More details

    Language:English  

    We developed a double-quantum mechanical / molecular mechanical (d-QM/MM) method for investigation of outer-sphere electron transfer (ET) processes between donor and acceptors (DA) in condensed matter [1].

    researchmap

  • 円錐型交差から見たシクロブタジエンとテトラへドラン間の基底状態ポテンシャルエネルギー曲面

    隅田 真人, 齋藤 一弥, 館山 佳尚

    第4回分子科学討論会2010大阪  2010.9 

     More details

    Language:Japanese  

    CASSCF計算を用いて,S1/S0 円錐型交差から基底状態PES (S0 PES)を計算し,無置換テトラへドラン分子から,シクロブタジエンへの対称性禁制反応を解析した.無置換テトラへドラン分子の単離の可能性について議論するとともに,円錐型交差からS0 PESの解析を行う事が有用である事を示す.

    researchmap

  • Formation Processes of Solid Electrolyte Interphase at Electrode Interfaces in Lithium-Ion Battery

    TATEYAMA, Yoshitaka, USHIROGATA, Keisuke, SODEYAMA, Keitaro, OKUNO, Yukihiro

    Psi-k 2015 Conference  2015.9 

     More details

    Language:English  

    Several key properties are governed by the quality of solid electrolyte interphase (SEI) formed on the interface between negative electrode and organic electrolyte. However, the interfacial processes have not been fully understood yet due to the difficulty in experimental observation. We have addressed such unresolved issues by using DFT-MD sampling techniques.

    researchmap

  • QM/MM Study of Piano-Stool Ru(II) Complexes Interacting with DNA

    フテラ ズデニェク, 館山 佳尚, Jaroslav V. Burda

    物性研・CMSI・次世代ナノ情報 合同研究会 「計算物質科学の課題と展  2011.1 

     More details

    Language:Japanese  

    Purpose of this project is to look at interaction of [(eta6-ben)RuII(en)Cl]+ complex with DNA, especially on structural changes of double-helix, and compare it with behaviour of cisplatin. It is well known that anti-cancer activity of cisplatin is caused by forming intra-strand cross-link between two adjacent guanines and we want to check possibility of this mechanism also in case of Ru(II) complex.

    researchmap

  • Computational photo and thermo reactions between tetra-tert-butyl-cyclobutadiene and tetrahedrane

    SUMITA, Masato, TATEYAMA, Yoshitaka, Kazuya Saito

    Pacifichem 2010  2010.12 

     More details

    Language:English  

    We have investigated the photo- and thermo-chemical reaction processes between tetra-tert-butylcyclobutadiene (TB-CBD) and tetra-tert-butyltetrahedrane (TB-THD) by using CASSCF and MRMP2 computational methods. Our results indicate that the photochemical reaction from TB-CBD to TB-THD occurs via the dipole forbidden HOMO-LUMO double electron excited state (21A1 state). After the excitation to the 21A1 state, most TB-CBD shows only photophysical property without any reactions because the final point of the minimum-energy-path (MEP) calculation at the MRMP2//CASSCF level is the S1/S0 conical intersection (CI), which has ionic like structure, leading to turning back to TB-CBD in the S0 state.

    researchmap

  • DFT samplings reveal atomistic mechanisms in electrolyte and at electrode interface in Li-ion battery

    TATEYAMA, Yoshitaka

    MANA-RSC symposium: Materials for Energy Generation and Storage  2015.10 

     More details

    Language:English  

    We carried out DFT-MD free energy calculations of the reductive decompositions of the carbonate-based electrolytes on the 10 peta-flops K computer in Japan, focusing on the thermodynamics as well as the kinetics1,2.

    researchmap

  • Conjugation of organic-metallic hybrid polymers and DNA for application to DD

    LI, Jinghua, FUTERA, Zdenek, LI, Hongfang, TATEYAMA, Yoshitaka, HIGUCHI, Masayoshi

    2010 International Chemical Congress of Pacific Basin Societies  2010.12 

     More details

    Language:English  

    The interaction of metal complexes with nucleic acids has aroused much interest in the development of novel DNA structure probes or new reagents for biotechnology and medicine. Metallo-supramolecular coordination polyelectrolytes (MEPEs) were obtained by self-assembly complexation of the ditopic bis-terpyridines with metal ions [Ru(II), Fe(II)]. The DNA binding studies between MEPEs and ct-DNA were investigated through UV-vis titration experiment, circular dichroism, cyclic voltammetry, atomic force microscope and electronic structure calculation. The results are supportive of electrostatic inte

    researchmap

  • 固液界面反応に関する第一原理計算アプローチ:現状と展望

    館山 佳尚

    第6回真空・表面科学若手研究会  2015.12 

     More details

    Language:Japanese  

    DFT計算の基礎を復習した後、固液界面・酸化還元・電気化学反応を取り扱うための理論的拡張を説明する。さらに京コンピュータ等を用いた二次電池、太陽電池、光触媒などの微視的機構解明について解説する。

    researchmap

  • First-Principles MD Study on Proton Diffusion in Anhydrous Perfluorosulfonic Acid - 1,2,3-Triazole Blend Membrane for PEFCs

    田中 喜典, 館山 佳尚, 井上 純一, 全 文錫, 金 済徳

    MRS-J  2010.12 

     More details

    Language:Japanese  

    Here, we discuss proton diffusion in anhydrous perfluorosulfonic acid (Nafion)&#8211;1,2,3-triazole blend membranes by first-principles molecular dynamics (MD) to understand additional insight into the membrane structure and function. The first-principles MD simulations are carried out in the framework of DFT (density functional theory) method implemented in Car-Parrinello molecular dynamics (CPMD) with generalized gradient corrected exchange-correlation functional. Calculated diffusion constant of 1,2,3-triazole in perfluorosulfonic acid is a couple of order larger in magnitude than that of water. Although the result shows low mobility, that implies a potential ability of anhydrous alternative way of proton diffusion in electrolytes.

    researchmap

  • Elucidation of complicated reactions around electrolyte - electrode interfaces in Li-ion battery

    TATEYAMA, Yoshitaka

    Pacifichem2015  2015.12 

     More details

    Language:English  

    We have then addressed providing electronic and atomistic mechanisms around electrolyte-electrode interfaces in LIBs, in collaboration with experimentalists, by using the advanced DFT simulations. Since LIB usually involves both electronics and ionics, dynamics and sampling is more crucial than the electronic states accuracy. Thus, we focused on efficient samplings and accurate calculations of free energies with rather standard DFT framework.

    researchmap

  • Interface Water on TiO2 Anatase (101) and (001) Surfaces: First-Principles Study with TiO2 Slabs Dipped in Bulk Water

    館山 佳尚, 隅田 真人, 胡 春平

    20th MRS-J Academic Symposium  2010.12 

     More details

    Language:Japanese  

    We investigated the TiO2 anatase (101) and (001) interfaces dipped in bulk water on the atomic scale by first-principles density-functional molecular dynamics (MD) simulations. We verified that the water adsorption models proposed in the previous studies with less than a couple of water layers on the vacuum surfaces still hold. On the contrary, novel adsorption structures of interfacial water molecules are also found. Our results indicate that water molecules around the interface between the TiO2 and bulk water can be described by a two-layer model

    researchmap

  • Semiconductor-water interfaces investigated by first principles calculations of boron doped diamond

    TATEYAMA, Yoshitaka

    Pacifichem2015  2015.12 

     More details

    Language:English  

    Semiconductor/electrolyte interfaces represent one of the most challenging systems for theoretical and computational description because of their complexity, nevertheless their detail understanding is crucial for modern electrochemistry, catalysis and batteries. Here, we investigated water interfaces of semiconductive boron-doped diamond (BDD) terminated by hydrogen (Figure), oxygen, and hydroxyl groups by using density functional theory (DFT)-based molecular dynamics [1]

    researchmap

  • Interfacial water on TiO2 anatase (101) and (001) surfaces by first-principles molecular dynamics with TiO2 slabs dipped in bulk water

    TATEYAMA, Yoshitaka

    Workshop on &quot;Materials Nanoarchitectonics for Sustainable D  2010.3 

     More details

    Language:English  

    We carried out density-functional Car-Parrinello molecular dynamics simulations of the TiO2 surfaces dipped in bulk water using slab model with periodic boundary condition at room temperature. Our simulations show that all fivefold Ti atoms (Ti5c) on the (101) surface undergo molecular adsorption of water, and dissociative adsorption predominantly occurs on the (001) surface, which basically confirms the recent suggestion based on the calculations using multi-layer water models in Prof. Selloni group. However, we obtained more detailed information of interfacial water structure.

    researchmap

  • DFT-MD Simulations Reveal Novel Mechanisms of Electrolyte and Electrode Interface in Li-ion Battery

    TATEYAMA, Yoshitaka

    MOST-NIMS Workshop  2015.4 

     More details

    Language:English  

    These properties are mainly governed by the quality of solid electrolyte interphase (SEI) film on the interface between electrode and electrolyte. The reductive decomposition of the electrolyte molecules plays a crucial role in the SEI formation. Slight change of the electrolyte component often exhibits a large impact on the SEI quality. However, the microscopic mechanisms in electrolyte and at electrode interface have not been fully understood yet. We have addressed such important issues by using the advanced DFT simulation techniques.

    researchmap

  • 第一原理計算による固液界面での酸化還元反応解析

    館山 佳尚

    日本化学会第90春季年会  2010.3 

     More details

    Language:Japanese  

    「固液界面での酸化還元反応」の電子・原子レベルからの理解はまだ完全にはほど遠い状態です。このような状況を理論計算側から解明すべく、我々は様々な酸化還元反応に対する第一原理分子動力学(MD)計算手法の開発・確立を行い、溶液系・固液界面系を用いて実証してきました。本講演では最近の題材を含めて、その一端を紹介したいと思います。

    researchmap

  • リチウムイオン電池電極ー電解質界面の第一原理計算研究

    館山 佳尚

    講演会「計算と実験による蓄電池材料研究」  2015.4 

     More details

    Language:Japanese  

    第一原理ダイナミクス・サンプリング解析による&#8194;リチウムイオン電池内反応機構の解明の最近の研究を紹介した。

    researchmap

  • Ab Initio Free Energy Calculation Methods for Redox Reactions

    TATEYAMA, Yoshitaka

    International Conference on Core Research and Engineering Scienc  2010.5 

     More details

    Language:English  

    Redox reactions play crucial roles in diverse topics in energy & environmental issues such as battery, fuel cell and catalysis. For theoretical simulations of such reactions, several ab initio calculation methods have been recently proposed, most of which focus on the potential variation near electrodes. We have taken a different strategy of using free energy to calculate the redox properties. Combining the idea of Marcus theory of ET, thermodynamic integration scheme, with density-functional (DF) molecular dynamics (MD), we have established ab initio calculation methods for redox free energies

    researchmap

  • DFT study on surface and interface states of tetragonal CH3NH3PbI3 for understanding interfacial charge transfer

    TATEYAMA, Yoshitaka, HARUYAMA, Jun, HAN, Liyuan, SODEYAMA, Keitaro

    International Conference on Hybrid and Organic Photovoltaics (HO  2015.5 

     More details

    Language:English  

    Many characters of bulk CH3NH3PbI3 (MAPbI3) such as small effective masses of the photo-excited carriers have been elucidated so far, whereas little is known about surface and interface properties of MAPbI3 yet due to the difficulty in the observations. Here we investigated surfaces of tetragonal MAPbI3 toward organic hole transport materials (HTMs) and the interfaces with model oxide anodes (ex. TiO2 surface), by density functional theory (DFT) based supercell calculations with PBE and rev-vdW-DF2 functionals.

    researchmap

  • Interfacial water on TiO2 anatase/bulk water interfaces: first-principles molecular dynamics via TiO2 slabs dipped in bulk water

    TATEYAMA, Yoshitaka, SUMITA, Masato, HU, Chunping

    STAC4  2010.6 

     More details

    Language:English  

    We carried out density-functional Car-Parrinello molecular dynamics simulations of the TiO2 surfaces dipped in bulk water using slab model with periodic boundary condition at room temperature (See Figure). Our simulations show that all fivefold Ti atoms (Ti5c) on the (101) surface undergo molecular adsorption of water, and dissociative adsorption predominantly occurs on the (001) surface, which basically confirms the recent suggestion based on the calculations using multi-layer water models in Prof. Selloni group. However, we obtained more detailed information of interfacial water structure

    researchmap

  • Co-sensitizer effect of black (N749) dye by DFT molecular dynamics investigations of TiO2(101)/black dye/acetonitrile interfaces

    TATEYAMA, Yoshitaka, OTANI, Yusuke, AIKAWA, Koharu, HAN, Liyuan, SODEYAMA, Keitaro

    International Conference on Hybrid and Organic Photovoltaics (HO  2015.5 

     More details

    Language:English  

    Although perovskite solar cells attract significant attention now, fundamental mechanisms of conventional dye-sensitized solar cells (DSC) have not been fully understood yet, and still deserve being investigated. Here we addressed a question why Ru 749 dye (black dye:BD) gives better efficiency than the others, which is useful for further improvement of DSCs. We examined stable structures and photoexcitation character of BD adsorption to TiO2 anatase (101) interface immersed in bulk acetonitrile (AN) solution, a most representative electrode interface in DSCs.

    researchmap

  • LIB の酸化還元反応、電極被膜、イオン伝導に対する第一原理計算アプローチ

    館山 佳尚

    電気化学界面シミュレーションコンソーシアム設立シンポジウム  2015.4 

     More details

    Language:Japanese  

    「京」上での第一原理統計サンプリングシミュレーションによる、LIB の酸化還元反応、電極被膜、イオン伝導の微視的機構解明に関する最近の研究を紹介。

    researchmap

  • FMO法に基づく三体項を導入した電子状態計算手法の開発

    小堀 知輝, 館山 佳尚, 袖山 慶太郎, 常行 真司

    分子科学討論会2010  2010.9 

     More details

    Language:Japanese  

    近年北浦和夫氏により開発されたフラグメント分子軌道(FMO)法は、第一原理に基づく生体分子のためのシミュレーション手法として注目を集めている。本研究では、FMO法に基づいて、系全体の電子状態を直感的にわかりやすい形で、効率的に求める新しい電子状態計算手法(FMO-LCMO法)を紹介する。本研究では、従来のFMO法で計算される各フラグメントおよびそのダイマー(およびトライマー)の一電子ハミルトニアンを組み合わせることで、系全体のハミルトニアンを構成する。組み合わせる際は、各部分系のハミルトニアンを表現する基底関数を原子軌道からフラグメント分子軌道に変換する。言い換えれば、系の電子状態は各フラグメントの分子軌道の線形結合(Linear Combination of Molecular Orbitals)で表現されることになる。

    researchmap

  • Lithium space-charge layer at interfaces between oxide cathode and sulfide electrolyte for interfacial resistance in all solid state lithium ion battery: A DFT simulation study

    TATEYAMA, Yoshitaka

    The 11th Pacific Rim Conference of Ceramic Societies (PACRIM11)  2015.8 

     More details

    Language:English  

    Although new inorganic (mainly sulfide) electrolyte materials with fast ion diffusion have been developed recently, the interfacial resistance is still an issue of significance. Then, we studied the mechanism of the interfacial resistance for its improvement, by using density functional theory (DFT) +U calculations. We focused on a typical ASS-LIB system with LiCoO2 oxide cathode and β-Li3PS4 sulfide electrolyte, and examined the effect of LiNbO3 buffer layer as well.

    researchmap

  • Wiring a single phthalocyanine molecule using polydiacetylene

    大川 祐司, マンダル スワパン クマー, 胡 春平, 館山 佳尚, GOEDECKER Stefan, 塚本 茂, 長谷川 剛, 青野 正和

    第4回分子科学討論会2010大阪  2010.9 

     More details

    Language:Japanese  

    機能性有機単分子に、単一の導電性高分子鎖を接続する方法を確立することは、単分子の電気特性の解明や、将来の単分子デバイスの開発に向けて極めて重要である。我々が提案する新しい方法では、我々がこれまで開発してきた、有機分子の連鎖重合反応を走査トンネル顕微鏡(STM)の探針により制御する方法を用い、連鎖重合反応の活性末端の自発的化学反応を利用する。本講演では、機能分子としてフタロシアニンを用いてこの方法による分子ナノ配線を実証し、さらに第一原理理論計算に基づく議論を行う。

    researchmap

  • First-principles MD study on redox reaction ability of semiconductor/water interfaces

    TATEYAMA, Yoshitaka

    CECAM workshop  2010.7 

     More details

    Language:English  

    we focus on electron transfer reaction across the interface. To obtain quantities associated with this

    researchmap

  • DFT-MD study on highly concentrated Li-salt electrolyte: A new class of electrolyte for batteries

    TATEYAMA, Yoshitaka, SODEYAMA, Keitaro

    Workshop on Materials Science for Energy Storage  2015.5 

     More details

    Language:English  

    In order to explore the underlying mechanisms of highly concentrated Li-salt electrolyte, we investigated low (LC) and high (HC) concentration systems of LiN(SO2CF3)2 (Li-TFSA) salt in acetonitrile (AN) solution by DFT-MD sampling techniques with extra electron(s) on the 10 petaflops “K computer” in Japan [2,3].

    researchmap

  • Density-functional molecular dynamics study on interfacial water

    TATEYAMA, Yoshitaka, SUMITA, Masato, HU, Chunping

    240th ACS National meeting  2010.8 

     More details

    Language:English  

    Redox reactions play crucial roles in diverse topics in energy & environmental issues such as battery, fuel cell and catalysis. For theoretical simulations of such reactions, several ab initio calculation methods have been recently proposed, most of which focus on the potential variation near electrodes. We have taken a different strategy of using free energy to calculate the redox properties. In fact, fundamental quantities of redox reactions are characterized by free energies, which are mainly governed by structural fluctuations along with electron transfer (ET). Combining the idea of Marcus theory of ET, thermodynamic integration scheme, with density-functional (DF) molecular dynamics (MD), we have established ab initio calculation methods for redox free energies

    researchmap

  • DFT study on surface and interface states of tetragonal CH3NH3PbI3 for understanding interfacial charge transfer

    館山 佳尚

    第10回 NIMS GREENシンポジウム  2015.6 

     More details

    Language:Japanese  

    Many characters of bulk CH3NH3PbI3 (MAPbI3) such as small effective masses of the photo-excited carriers have been elucidated so far, whereas little is known about surface and interface properties of MAPbI3 yet due to the difficulty in the observations. Here we investigated surfaces of tetragonal MAPbI3 toward organic hole transport materials (HTMs) and the interfaces with model oxide anodes (ex. TiO2 surface), by density functional theory (DFT) based supercell calculations with PBE and rev-vdW-DF2 functionals.

    researchmap

  • Water structure of TiO2 anatase/waer interfaces:First-principles MD study with TiO2 slabs soaked in bulk water

    TATEYAMA, Yoshitaka, SUMITA, Masato, HU, Chunping

    CECAM workshop &quot;Titania for all seasons&quot;  2010.9 

     More details

    Language:English  

    We investigated the interface properties of the TiO2 anatase (101) and (001) surfaces

    researchmap

  • 固液界面・酸化還元・電気化学反応の第一原理計算

    館山 佳尚

    第55回分子科学若手の会夏の学校  2015.8 

     More details

    Language:Japanese  

    エネルギー変換に関する微視的機構の解明や新しい電池・触媒の設計・開発は物理・化学・材料科学をまたぐ最重要課題の一つです。このエネルギー変換の根元は酸化還元過程に帰着させることができます(光励起も重要ですが、電子移動がなければエネルギーを取り出せません)。また反応場として界面が重要な役割を果たします。本分科会では、この課題に焦点をあて、エネルギー・環境関連の研究・開発に興味のある若手、特に理論計算シミュレーションを念頭におく諸君に、理解しておいてもらいたい事柄をまとめて講義することにしました。

    researchmap

  • Water structure and redox reactivity of TiO2 anatase / water interfaces: Firstprinciples MD study with TiO2 slabs soaked in bulk water

    TATEYAMA, Yoshitaka, SUMITA, Masato, HU, Chunping

    Psi-K conference 2010  2010.9 

     More details

    Language:English  

    We investigated the interface properties of the TiO2 anatase (101) and (001) surfaces

    researchmap

  • Surface termination & ion migration of perovskite materials

    TATEYAMA, Yoshitaka

    CECAM workshop: Perovskite solar cells: the quest for a theoreti  2015.8 

     More details

    Language:English  

    Here I introduce our recent studies on the termination effects of (110), (001), (100) and (101) surfaces of tetragonal MAPbI3 toward organic hole transport materials (HTMs) [1], and the interface states with model oxide anodes, by density functional theory based supercell calculations with PBE and vdW-DF2-B86R functionals

    researchmap

  • TDDFT-MD Study on Dynamics in Photoinduced Ring Opening of Benzene

    OHNO, Takahisa, Y.Miyamoto, OYAMA, Norihisa, TATEYAMA, Yoshitaka

    Annual APS March Meeting 2004  2004.3 

     More details

    Language:English  

    ベンゼン結晶は光照射下で通常より低い圧力で開環反応を伴う構造変化を引き起こす。時間依存密度汎関数法を用いて、光照射による電子励起下でのベンゼン環の構造変化を解析した。その結果、ベンゼン分子では開環反応は起こらないが、結晶中では分子間の相互作用により開環反応が誘起される可能性があることを見出した。

    researchmap

  • 光触媒系二酸化チタン/水界面の吸着水と水素結合に関する第一原理分子動力学解析

    隅田 真人, Chunping Hu, 館山 佳尚

    分子科学討論会  2011.9 

     More details

    Language:Japanese  

    アナターゼ型二酸化チタンの(101)面と(001)面上のバルクの水の様子を,第一原理分子動力学法を用いて探索した.その結果,水分子は(101)面では分子吸着され,(001)面においては解離吸着されている事が確認された.吸着された水分子はバルクの水の水素結合ネットワークに参加しており,表面に数層の水分子を置いた従来の計算結果とは異なる吸着構造を取っている.さらに,より詳細な解析の結果によって,水バルク中と比べて弱い水素結合は(001)面上のみに現れる事が分かった.この結果は1H-NMRの結果とも一致する事を報告する.

    researchmap

  • Surface termination & ion migration of perovskite materials for carrier transport and aging

    TATEYAMA, Yoshitaka

    ENGE2016  2016.11 

     More details

    Language:English  

    I will introduce our recent studies on Surface termination & ion migration of perovskite materials for carrier transport and aging.

    researchmap

  • Fist-principles/Tight-binding hybrid simulation for Si system

    中村 美道, 高橋 憲彦, 高木祥光, 宇田毅, 西川宜孝, 新田仁, 館山 佳尚, 大野 隆央

    日本物理学会 第59回年次大会  2004.3 

     More details

    Language:Japanese  

    Si系での応用を念頭に第一原理(FP)/強結合(TB)ハイブリッド計算手法を開発した。手法の有効性、および今後の応用について紹介する。

    researchmap

  • Adsorption and excitation of Ru(II) polypyridyl complex on TiO2 anatase (101) surface for dye-sensitized solar cells

    袖山 慶太郎, 隅田 真人, 館山 佳尚

    日本物理学会2011年秋季大会  2011.9 

     More details

    Language:Japanese  

    色素増感太陽電池のエネルギー変換効率を系統的に向上させていくためには、分子レベルにおける界面の構造を理解することが必要不可欠である。本発表では二酸化チタンアナターゼ(101)表面におけるブラックダイの吸着構造および励起状態に関して、第一原理計算による検討を行った。特に色素のカルボキシル基に存在するプロトンが、表面に吸着後どの位置にあるのが最も安定であるかは色素の設計上非常に重要な情報であるため、それぞれの構造について計算を行い安定性を比較した。その結果、プロトンが色素側に残ったままの構造の方が、色素から離れて表面に吸着した構造よりも安定であることを明らかにした。さらにそれらの構造における励起状態計算を行った結果、プロトンが色素側に存在する構造におけるUV-visスペクトルが実験値とよい相関を示すことを確認した。

    researchmap

  • DFT molecular dynamics studies on battery materials: SEI film and superconcentrated electrolyte

    TATEYAMA, Yoshitaka

    IWAMSN2016  2016.11 

     More details

    Language:English  

    I will introduce our recent studies on DFT molecular dynamics studies on battery materials: SEI film and superconcentrated electrolyte.

    researchmap

  • Real time dynamics of photoinduced deformation in solid benzene by TDDFT

    TATEYAMA, Yoshitaka, 宮本良之, OYAMA, Norihisa, OHNO, Takahisa

    Time dependent Density-Functional Theory: Prospects and Applicat  2004.9 

     More details

    Language:English  

    Coupled dynamics of ions and electrons in the excited states of molecular and solid benzene is investigated on the femtosecond scale by TDDFT with the Suzuki-Trotter decomposition for the propagation. Within the $pi$ - $pi^*$ excitations, any out-of-plane motion of the ions is not induced in the molecular system, as expected from the symmetry consideration. In the solid, however, we found that large swing of the C-H bonds and subsequent twist of the carbon ring take place, leading to $sp3$-like bonding of carbon ions. This swing-to-twist motion presents a plausible mechanism underlying the photoinduced ring opening in solid benzene experimentally observed under pressure.

    researchmap

  • DFT spin-contamination problem on magnetic impurity defect in diamond

    館山 佳尚, 大塚教雄, 原田慈久, 森田将史

    日本物理学会秋季大会2011  2011.9 

     More details

    Language:Japanese  

    Quantum computingや磁力計等への応用を目指し、diamond NV- centreの研究が現在盛んに行われている。我々は更なる高磁性・高安定性を目指してdiamond中にMn原子を埋め込んだ材料開発とその特性評価に取り組んでいる。本講演ではその磁性不純物欠陥の構造・スピン安定性に関するDFT計算解析、およびそこで直面したスピン汚染問題について報告する。

    researchmap

  • 第一原理計算による層状化合物MXene負極へのカチオン挿入機構の解析

    サボバ ルチエ, 袖山 慶太郎, 梶山智司, 大久保將史, 山田淳夫, 館山 佳尚

    第57回電池討論会  2016.11 

     More details

    Language:Japanese  

    我々が行った第一原理計算による層状化合物MXene負極へのカチオン挿入機構の解析について紹介する。

    researchmap

  • Electrochemistry in a very small cell: A computational approach

    Michiel Sprik, Jochen Blumberger, TATEYAMA, Yoshitaka

    The 229th ACS National Meeting  2005.3 

     More details

    Language:English  

    Electrochemists control the thermodynamic driving force of redox reactions in an electrochemical cell by applying a voltage to the electrodes. In computations the same effect can be achieved by shifting the potential energy surfaces of different oxidations states with respect to each other (omitting any physical electrode). We have implemented this method using density functional theory based ab initio molecular dynamics simulation (&quot;Car-Parrinello&quot;). In this talk we summarize the latest results we have obtained applying this method to a number of small redox active aqueous solutes (mainly transition metal complexes). We compare our computations to experiment (redox potentials) as well as theory (Marcus Theory of electron transfer.)

    researchmap

  • Adsorption and photoexcitation of black dye (N749 Ru dye) on TiO2 anatase (101) surface for dye-sensitised solar cell

    TATEYAMA, Yoshitaka, SODEYAMA, Keitaro, SUMITA, Masato

    ICTP-SISSA Workshop on New Materials for Renewable Energy  2011.10 

     More details

    Language:English  

    We have investigated adsorption and photoexication of another Ru-complex, black dye having a terpyridine ligand (Ru(4,4

    researchmap

  • stat-CPMDを用いた リチウムイオン電池界面被膜に関する第一原理計算研究

    館山 佳尚

    重点課題⑤「エネルギーの高効率な創出,変換・貯蔵,利用の新規基盤  2016.12 

     More details

    Language:Japanese  

    我々が行ったstat-CPMDを用いた リチウムイオン電池界面被膜に関する第一原理計算研究について紹介する。

    researchmap

  • 二次電池電解液・電極界面の計算材料科学

    館山 佳尚

    日本物理学会2016年秋季大会  2016.9 

     More details

    Language:Japanese  

    我々が行っている二次電池電解液・電極界面の計算材料科学について紹介する。

    researchmap

  • Computational study on photo- and thermo-reactions between tetra-tert-butyl-substituted cyclobutadiene and tetrahedrane

    SUMITA, Masato, Kazuya Saito, TATEYAMA, Yoshitaka

    ISTCP-VII  2011.9 

     More details

    Language:English  

    We have investigated the photo-chemical reaction from tetra-tert-butylcyclobutadiene (TB-CBD) to tetra-tert-butyltetrahedrane (TB-THD) and its reverse thermo-chemical reaction processes in the ground state [1] by using CASSCF and MRMP2 computational methods.

    researchmap

  • ボロンドープダイヤモンド(Boron-Doped Diamond:BDD)電極によるOHラジカル発生機構

    館山 佳尚, Zdenek Futera, 渡辺剛志, 栄長泰明

    第118回触媒討論会  2016.9 

     More details

    Language:Japanese  

    我々が行っているボロンドープダイヤモンド(Boron-Doped Diamond:BDD)電極によるOHラジカル発生機構の第一原理計算解析について紹介する。

    researchmap

  • 固液界面の大規模第一原理計算

    隅田 真人, 袖山 慶太郎, 館山 佳尚

    第2回「学際計算科学による新たな知の発見・統合・創出」シンポジウ  2011.9 

     More details

    Language:Japanese  

    アナターゼ型二酸化チタンの(101)面と(001)面上のバルクの水の様子を,第一原理分子動力学法を用いて探索した.その結果,水分子は(101)面では分子吸着され,(001)面においては解離吸着されている事が確認された.吸着された水分子はバルクの水の水素結合ネットワークに参加しており,表面に数層の水分子を置いた従来の計算結果とは異なる吸着構造を取っている.さらに,より詳細な解析の結果によって,水バルク中と比べて弱い水素結合は(001)面上のみに現れる事が分かった.この結果は1H-NMRの結果とも一致する事を報告する.

    researchmap

  • 計算科学技術支援による蓄電池機構解明と材料設計

    TATEYAMA, Yoshitaka

    NIMS WEEK 2016  2016.10 

     More details

    Language:English  

    我々が行っている計算科学技術支援による蓄電池機構解明と材料設計について紹介する。

    researchmap

  • Time-dependent density functional study on the photoisomerization mechanism of azobenzene

    OYAMA, Norihisa, TATEYAMA, Yoshitaka, 宮本良之, OHNO, Takahisa

    Annual APS March Meeting 2004  2004.3 

     More details

    Language:English  

    Photochemical reactions in organic molecules have attracted considerable attention in semiconductor physics and also in bioscience. Azobenzene is a simple molecule which shows the reversible photoisomerization at high quantum yields, and can be used as a light-driven molecular switch and so on. However, the photoisomerization process of azobenzene is still an open question because of its femtosecond ultra-fast reaction. In this talk, we present time-dependent density functional calculations for the azobenzene molecule, and discuss the mechanism of photoisomerization induced by S1 and S2 excitations. This research is partially supported by ACT-JST, and also by FSIS and Special Coordination Funds of MEXT of Japanese Government. The calculations were carried out partly using the Numerical Materials Simulator in National Institute for Materials Science, and partly using the NEC-SX5 at Cybermedia Center of Osaka University.

    researchmap

  • 溶液および固液界面の電子状態:第一原理分子動力学アプローチ

    館山 佳尚

    第23回液体の化学夏の学校2011  2011.9 

     More details

    Language:Japanese  

    溶液反応・固液界面反応を理解するには、構造揺らぎ・電子状態揺らぎの両者を考慮する必要があります。溶質・溶媒・固体の電子状態を考慮しながら液体ダイナミクスを取り扱える第一原理分子動力学(MD)計算は、その最有力ソリューションです。計算機能力の向上と共に扱えるサイズ・サンプリング数・計算精度とも向上し、様々な系を扱えるようになってきました。

    researchmap

  • 色素増感・ペロブスカイト太陽電池界面の電荷移動機構に関する第一原理計算解析

    濱田 幾太郎, 館山 佳尚, 袖山 慶太郎, 大谷 優介

    第3回「京」を中核とするHPCIシステム利用研究課題 成果報告会  2016.10 

     More details

    Language:Japanese  

    我々が行っている色素増感・ペロブスカイト太陽電池界面の電荷移動機構に関する第一原理計算解析について紹介する。

    researchmap

  • H-INDUCED DECOHESION ACROSS THE GRAIN BOUNDARY AND H-ENHANCED VACANCY ACTIVITY IN METALS

    GENG, Wen-Tong, Arthur J. Freeman, Gregory B. Olson, TATEYAMA, Yoshitaka, OHNO, Takahisa

    The 11th International Conference on Fracture  2005.3 

     More details

    Language:English  

    The rapid diffusion of H in metals permits an easy segregation to the grain boundary and an easy trapping to the vacancy. H-induced intergranular embrittlement in metals such as Fe and Ni is generally a result of coalition of segregated H and other embrittling impurities at the grain boundary. Ab initio total energy calculations based on the density functional theory have shown that H alone can also weaken the cohesion across the grain boundary. The stronger binding of H with a free surface than with a grain boundary, which results in grain boundary embrittlement according to the Rice-Wang theory, can be ascribed to its monovalency. New tensile experiments point to a H-enhanced vacancy contribution to the increased susceptibility of steel to H embrittlement. Ab initio calculations on the energetics of interstitial H, vacancy, and H-monovacancy complexes (VHn) in Fe have shown that the predominant complex under ambient condition of H pressure is VH2, not VH6 as previously suggested by effective-medium theory c

    researchmap

  • Protonated carboxyl anchor for stable adsorption of N749 Ru dye (black dye) on TiO2 anatase (101) surface

    SODEYAMA, Keitaro, SUMITA, Masato, TATEYAMA, Yoshitaka

    The 14th ASIAN Workshop  2011.10 

     More details

    Language:English  

    本発表では二酸化チタンアナターゼ(101)表面に吸着するブラックダイの吸着構造および励起状態に関して第一原理計算による理論的検討を行った。考え得る4種類の吸着構造を計算により求めた結果、色素のカルボキシル基と表面のチタン原子との結合が1本である構造の方が2本の場合よりも安定であることを明らかにした。これは主に、結合が1本の場合には色素が自由に回転できるために色素と表面の間に水素結合ができることによる。また色素にプロトンが残ったままの構造の方が表面にプロトンが移動した場合よりも安定であることも明らかにした。その構造における励起状態計算を行ったところ、UV-visスペクトルが実験値とよい相関を示した。プロトンの存在する位置により太陽電池の効率は大きく変化すると言われており、本構造は新しい設計メカニズムに対する新しいコンセプトを提案している。

    researchmap

  • 計算科学技術による蓄電池機構解明・材料設計

    館山 佳尚

    日本化学会第97春季年会  2017.3 

     More details

    Language:Japanese  

    There are two major computational approaches to the next-generation battery materials now; (1) large-scale accurate simulations of the microscopic chemical processes for better understanding and future design, and (2) quick screening of potential materials via materials informatics techniques. Here I’ll introduce our recent works along with the former strategy mainly. Developing highly-efficient DFT-based sampling techniques (ex. stat-CPMD code) for supercomputers such as the K computer, we addressed the crucial issues on the electrode-electrolyte interfaces and the electrolytes in the battery field

    researchmap

  • Dynamics of the photoisomerization process of trans-azobenzene: A time-dependent density functinal study

    OYAMA, Norihisa, TATEYAMA, Yoshitaka, 宮本良之, OHNO, Takahisa

    Annual APS March Meeting 2005  2005.3 

     More details

    Language:English  

    Azobenzene is a typical molecule which shows a reversible photoisomerization, and has attractive considerable attention for molecular devices. The photoisomerization mechanism of trans-azobenzene, however, has been controversial for over a half century because of its ultra-fast reaction. In this work, we investigated the dynamics of the photoisomerization process of trans-azobenzene based on time-dependent density functional theory. Our calculations clearly indi-cate that the photoisomerization process for S$_1$ excitation occurs through a rotation channel against the widely-accepted inversion mechanism. In contrast, it was found that a direct isomeriza-tion does not occur for S$_2$ excitation, and a transition to S$_1$ occurs at about 100fs.

    researchmap

  • First-Principles Study on Semiconductor Electrode/Liquid Interfaces for Photocatalysis and Dye-Sensitised Solar Cell

    TATEYAMA, Yoshitaka, SUMITA, Masato, SODEYAMA, Keitaro

    Intl Sympo on Atomically Controlled Fabrication Technology  2011.10 

     More details

    Language:English  

    Though a lot of progress has been made in the development of photocatalysis and solar cell, atomistic mechanisms of the chemical reactions at the solid/liquid interfaces have not yet been fully understood because of the difficulty in analyzing such interfacial processes. In order to solve this problem, we have been studying semiconductor electrode/liquid interfaces, associated with photocatalysis (PC) and dye-sensitised solar cell (DSC), on the atomic and electronic scales, by use of quantitative theoretical simulations based on the density functional theory (DFT) with supercomputers.

    researchmap

  • Extensive investigations of surface properties of ABO3 perovskite materials toward surface machine leaning

    IIZUKA, Shota, Sergey Levchenko, TATEYAMA, Yoshitaka, Matthias Scheffler

    2017 International Workshop on Electrified Interfaces for Energy  2017.5 

     More details

    Language:English  

    Toward catalyst or surface informatics study, database of surface properties is of great importance. However, there have been few comprehensive computational investigations of surface properties. We focus on A3+B3+O3-type of ABO3 perovskite materials, and address first- principles calculations of structures, electronic states and defect properties of the several surfaces (surface terminations) that are expected to be stable, by using the fhi-aims code. We pay much attention to keep the same accuracy because it is quite important for the efficient machine learning. We believe that the present results will play sufficient roles for the surface machine learning. This study is carried out in collaboration with Dr. Sergey Levchenko, Dr. Aliaksei Mazheika as well as Prof. Matthias Scheffler in t

    researchmap

  • Constant chemical potenital Car-Parrinello MD study on redox reactions in aqueous solution

    館山 佳尚, Michiel Sprik

    日本物理学会第60回年次大会  2005.3 

     More details

    Language:Japanese  

    水溶液中の原子・分子の酸化還元反応に対して、グランドカノニカルカーパリネロ分子動力学法を適用し、標準酸化還元電位の見積もりを行った。さらに溶媒効果など個々の寄与の検討を通して、自由エネルギー差に対する本計算手法の精度について吟味を行った。また既存の電子移動反応理論との関連性についても新しい知見を得た。

    researchmap

  • Water Contamination Effect on Liquid Acetonitrile / TiO2 Anatase (101) Interface for Durable Dye-sensitized Solar Cell

    SUMITA, Masato, SODEYAMA, Keitaro, HAN, Liyuan, TATEYAMA, Yoshitaka

    The 14th Asian Workshop on First-Principles Electronic Structure  2011.10 

     More details

    Language:English  

    We have investigated structural and electronic properties of liquid acetonitrile (MeCN) / TiO2 anatase (101) interfaces involving a water molecule in order to analyze effect of ubiquitous water contamination in the typical electrolyte solution on the durability of dye-sensitized solar cell (DSSC), by using density-functional molecular dynamics simulations at room temperature.

    researchmap

  • アゾベンゼンの光異性化メカニズムに関する理論的研究

    小山 紀久, 館山 佳尚, 宮本良之, 大野 隆央

    日本化学会第85春季年会  2005.3 

     More details

    Language:Japanese  

    時間依存密度汎関数理論に基づき、トランスアゾベンゼンの励起後のダイナミクスを計算し、長年未解決である光異性化メカニズムに関して検討した。その結果、S1励起に関しては励起直後からN=Nボンドがねじれ、これまで長年信じられてきた反転メカニズムではなく、回転メカニズムに従って異性化が進行することが明らかとなった。これはねじれによってp軌道成分が増加するHOMOと、s軌道成分が増加するLUMOに電子がそれぞれ存在するするため、結果として90°程度ねじれた方がエネルギー的に安定となるためである。一方、S2励起に関しては励起直後から電子状態が不安定となり、構造は平坦性を維持し続けた。また100フェムト秒程度でS1状態へ遷移し、直接基底状態のcis体へ遷移することはないことが明らかとなった。

    researchmap

  • Conductive Polymer Chain Wiring to a Functional Molecule via Chemical Soldering

    OKAWA, Yuji, MANDAL, Swapan, Kumar, HU, Chunping, TATEYAMA, Yoshitaka, GOEDECKER Stefan, TSUKAMOTO, Shigeru, HASEGAWA, Tsuyoshi, GIMZEWSKI, James, AONO, Masakazu

    MANA International Symposium 2011  2011.3 

     More details

    Language:English  

    For making electric connections to individual functional molecules, a method to wire single molecules with conductive organic polymers is required. We have developed a method using a probe tip of scanning tunneling microscope (STM) to control the chain polymerization of diacetylene compounds on a self-ordered layers, thereby creating single chains of conductive polydiacetylene (PDA). Here we show our recent experimental and theoretical results how conductive polymers can be connected to a functional molecule via covalent bonds. The propagating ends of chain polymerization have reactive chemical species and therefore react with the adsorbed molecule and form chemical bonds spontaneously. We call this method “chemical soldering”.

    researchmap

  • 重点課題名:⑤エネルギーの高効率な創出、変換・貯蔵、利用の新規基盤技術の開発

    館山 佳尚

    産応協、CMSI、ポスト京重点課題5・6・7合同 産学官連携シンポジ  2016.2 

     More details

    Language:Japanese  

    重点課題⑤エネルギーの高効率な創出、変換・貯蔵、利用の新規基盤技術の開発について紹介する。

    researchmap

  • First-principles calculation study on redox reactivity of diamond(111)/water interface

    TATEYAMA, Yoshitaka

    MANA International Symposium 2011  2011.3 

     More details

    Language:English  

    Redox (electron transfer) reactions on solid/solution interfaces play crucial roles in diverse topics in energy & environmental issues such as fuel cell, solar cell, catalysis, corrosion. However, the microscopic mechanisms of those reactions are still matters of debate, and the elucidation at the atomic scale is highly desired for the theoretical reaction design in the future. For the theoretical simulation, we have developed a first-principles (FP) molecular dynamics (MD) technique to calculate electronic chemical potential of electrode, flat band potential (FBP) and potential of zero charge (PZC). This technique is based on the Marcus theory of electron transfer as well as the fundamentals of density functional theory (DFT), and using the physicochemical concept that the electrode bias

    researchmap

  • DFT samplings reveal atomistic mechanisms around electrolyte-electrode interfaces in batteries

    TATEYAMA, Yoshitaka

    Japanese Swiss Energy Materials Workshop  2016.3 

     More details

    Language:English  

    I introduce our recent works on DFT samplings reveal atomistic mechanisms around electrolyte-electrode interfaces in batteries.

    researchmap

  • First-principles study on Ru(4,4

    SODEYAMA, Keitaro, SUMITA, Masato, TATEYAMA, Yoshitaka

    APS march meeting 2011  2011.3 

     More details

    Language:English  

    For the improvement of the power conversion of DSSC, we need to understand the adsorbed structures at atomistic level in detail. In this study, we investigated the adsorbed structures of Ru(4,4

    researchmap

  • Theoretical study on surface and ion migration of perovskite materials in Perovskite Solar Cell (PSC)

    TATEYAMA, Yoshitaka

    MANA International Symposium 2016  2016.3 

     More details

    Language:English  

    I will introduce Theoretical study on surface and ion migration of perovskite materials in Perovskite Solar Cell (PSC).

    researchmap

  • Conjugation of Organic-Metallic Hybrid Polymers and Calf-Thymus DNA

    李 菁華, フテラ ズデニェク, 館山 佳尚, MURAKAMI Tatsuya, 樋口 昌芳

    日本化学会第91春季年会  2011.3 

     More details

    Language:Japanese  

    Organic-metallic hybrid polymers were synthesized by self-assembly. The conjugationof polymers and calf-thymus DNA were investigated by UV titration, CD, CV, luminescence,AFM, and electronic structure calculation. The cell cytotoxicity was also studied.

    researchmap

  • 「京」を用いた蓄電池界面・SEI膜の第一原理計算解析

    館山 佳尚

    第1 回SPRUC 分野融合研究(実用)ワークショップ  2016.3 

     More details

    Language:Japanese  

    「京」を用いた蓄電池界面・SEI膜の第一原理計算解析について紹介する。

    researchmap

  • 二次電池内プロセスに関する第一原理計算研究の展開

    館山 佳尚

    TCCI第5回産学連携シンポジウム  2016.1 

     More details

    Language:Japanese  

    二次電池内プロセスに関する第一原理計算研究の展開について報告する。

    researchmap

  • ZrO2-CeO2 interface properties : a first-principle investigation

    フロンジ マルコ, 館山 佳尚, トラベルサ エンリコ, Alessandro Vita

    物性研・CMSI・次世代ナノ情報 合同研究会 「計算物質科学の課題と展  2011.1 

     More details

    Language:Japanese  

    In the present work we use a computational Density Functional Theory approach to investigate the structural and electronic properties of the low index ZrO2-CeO2 interface. Optimization of the lattice geometry for the separate ZrO2 and CeO2 bulks as well as the interface is carried out and the structural morphology is analyzed.

    researchmap

  • 偏光X 線を用いた放射光光電子分光

    大橋 直樹, 大澤 健男, 上田 茂典, 鈴木基寛, ウィリアムズ ジェシー, ロバート, 館山 佳尚

    文部科学省 元素戦略プロジェクト<研究拠点形成型>/大型研究施設  2016.1 

     More details

    Language:Japanese  

    偏光X 線を用いた放射光光電子分光の応用事例として、部分状態密度の理論的・実験的評価に向けた検討結果を報告する。特に、DFT計算で算出される投影状態密度(PDOS)と偏光X線を使ったXPSスペクトルとの比較を行った結果を論じる。

    researchmap

  • Ab initio investigation of ZrO2-CeO2 interface properties

    FRONZI, Marco, Alessandro Vita, TATEYAMA, Yoshitaka, TRAVERSA, Enrico

    15th International Workshop on Computational Physics and Materia  2011.1 

     More details

    Language:English  

    In the present work we present a Density Functional Theory approach to investigate the structural and electronic properties of the low index ZrO2-CeO2 interface. Optimizations of the crystal geometry for the separate ZrO2 and CeO2 bulks as well as the interfaces are carried out and the structural morphology is analyzed.

    researchmap

  • 電極界面における電解液反応シミュレーション 〜リチウムイオン2次電池の安全性・機能性向上に向けて〜

    館山 佳尚

    文部科学省 元素戦略プロジェクト<研究拠点形成型>/大型研究施設  2016.1 

     More details

    Language:Japanese  

    我々のグループの電極界面における電解液反応シミュレーションについて紹介する。

    researchmap

  • Ab initio investigation of ZrO2-CeO2 interface properties

    FRONZI, Marco, Alessandro DeVita, TATEYAMA, Yoshitaka, TRAVERSA, Enrico

    The 219th ECS meeting  2011.5 

     More details

    Language:English  

    In the present work we use a computational Density Functional Theory approach to investigate the structural and electronic properties of the (100) and (111) ZrO2-CeO2 interface. Optimisation of the lattice geometry for the separate ZrO2 and CeO2 bulks as well as the interface is carried out and the structural morphology is analysed. The energy formation of the oxygen vacancies are analysed at different values of lattice parameter, in order to verify its dependency on the strain.

    researchmap

  • Ab-initio MD simulations of redox reactions of liquid electrolytes and SEI formation

    TATEYAMA, Yoshitaka

    CPMD2016 Conference  2016.5 

     More details

    Language:English  

    We focused on the thermodynamics as well as the kinetics of the possible processes. We used DFT-based Car-Parrinello MD (CPMD) with explicit solvent molecules for the equilibrium properties, and carried out the free energy profile calculations along the reaction pathways using the blue-moon ensemble technique with constraint CPMD. We considered Li+ in only EC solvent (EC system) and in EC solvent with a VC additive (EC/VC system) to elucidate the additive effect. The supercells involving 32 EC molecules or 31 EC with one VC molecules, with one Li atom, were adopted. It is cubic box with a length of 15.24 &#197; to reproduce the experimental EC density, and periodic boundary condition is applied for keeping the liquid density constant. We used the Nos&#233; thermostat with a temperature

    researchmap

  • Organic-Metallic Hybrid Polymers: Effect of Substituent on DNA Binding Properties

    李 菁華, フテラ ズデニェク, 館山 佳尚, 村上 達也, 樋口 昌芳

    第60回高分子学会年次大会  2011.5 

     More details

    Language:Japanese  

    Herein, we synthesized novel organic-metallic hybrid polymers. The interaction between polymer and ct-DNA was investigated by UV, CV, CD, luminescence, AFM, and electronic structure calculation. All results are supportive of electrostatic mode of binding.

    researchmap

  • スパコンを用いた二次電池電解液・電極界面の微視的機構研究

    館山 佳尚

    第381回電池技術委員会  2016.6 

     More details

    Language:Japanese  

    二次電池の電解液・電極界面は、イオン輸送抵抗、電解液の酸化還元分解、SEI(Solid Electrolyte Interphase)膜形成・分解など、電池の性能と信頼性を左右する主要過程の反応場となっています。しかし界面における電子・原子の挙動は、実験によるその場観察がまだ難しいため、いまだによく分かっていません。そこで我々は、スパコンによる第一原理分子動力学シミュレーションを駆使して、電解液・電極界面で起こっている現象の微視的機構の解明に取り組みました。

    researchmap

  • Adsorption and excitation of black-dye on TiO2 anatase(101) surface for dye-sensitized solar cells

    SODEYAMA, Keitaro, SUMITA, Masato, TATEYAMA, Yoshitaka

    ISTCP-VII (Congress of the International Society for Theoretical  2011.9 

     More details

    Language:English  

    高効率な色素増感太陽電池開発のため、本発表では二酸化チタンアナターゼ(101)表面に吸着するブラックダイの吸着構造および励起状態に関して理論的検討を行った。第一原理計算により考え得る4種類の吸着構造を求めた結果、色素のカルボキシル基と表面のチタン原子との結合が1本である構造の方が2本の場合よりも安定であることを明らかにした。これは、結合が1本の場合には色素が自由に回転できるために色素と表面の間に水素結合ができること、さらに配位子が構造的に歪む影響による。また色素にプロトンが残ったままの構造の方が表面にプロトンが移動した場合よりも安定であることも明らかにした。その構造における励起状態計算を行ったところ、UV-visスペクトルが実験値とよい相関を示した。プロトンの存在する位置により太陽電池の効率は大きく変化すると言われており、本構造は新しい設計メカニズムに対する新しいコンセプトを提案している。

    researchmap

  • Ab-initio MD simulations of redox reactions of liquid electrolytes and SEI formation

    TATEYAMA, Yoshitaka

    IMLB2016 (18th International Meeting on Lithium Batteries)  2016.6 

     More details

    Language:English  

    Atomistic understanding of solid electrolyte interphase (SEI) formed at the interface between electrode and liquid electrolyte is still an issue of great importance. However, difficulties in experimental in-situ observations of the buried interfaces and simulations considering the liquid dynamics (fluctuation) and reaction have inhibited the progress of elucidation. We have addressed such issues by means of accurate large-scale ab-initio molecular dynamics (MD) samplings and free energy calculations on a huge supercomputer.

    researchmap

  • Interface Water on TiO2 Anatase (101) and (001) Surfaces: First-Principles Study with TiO2 Slabs Dipped in Bulk Water

    SUMITA, Masato, Chunping Hu, TATEYAMA, Yoshitaka

    ISTCP-VII  2011.9 

     More details

    Language:English  

    We investigated the TiO2 anatase (101) and (001) interfaces dipped in bulk water on the atomic scale by first-principles density-functional molecular dynamics (MD) simulations. We verified that the water adsorption models proposed in the previous studies with less than a couple of water layers on the vacuum surfaces still hold. On the contrary, novel adsorption structures of interfacial water molecules are also found.

    researchmap

  • DFT-MD Analysis of Redox Reaction at Solid-Electrolyte Interface in Battery and Solar Cell

    TATEYAMA, Yoshitaka

    One Day Workshop on Chemical Reactions at Surfaces and Interface  2014.1 

     More details

    Language:English  

    In this talk, I

    researchmap

  • Additive effect on reductive decomposition and binding of carbonate-based electrolyte in Lithium ion battery: A DFT free energy analysis

    TATEYAMA, Yoshitaka

    TNTJapan2014  2014.1 

     More details

    Language:English  

    We focused on the thermodynamics as well as the kinetics of the possible processes. We used density functional theory based molecular dynamics (DFT-MD) with explicit solvent molecules for the equilibrium properties, and carried out the free energy profile calculations along the reaction pathways using the blue-moon ensemble technique. We compared between Li+ in only EC solvent (EC system) and in EC solvent with a VC additive (EC/VC system) to elucidate the additive effect. Nos&#233; thermostat with a temperature of 353 K is adopted for the finite temperature effect. Further tuning of the DFT-MD code was made for the use of the ten-petaflops supercomputer (K computer) in Japan.

    researchmap

  • 酸化物ー溶液界面の酸化還元反応の理論解析

    館山 佳尚

    日本物理学会第69回年次大会  2014.3 

     More details

    Language:Japanese  

    我々のグループでは、触媒・電池の出口への展開を念頭に置きながら、各種酸化物ー溶液界面(TiO2/H2O, TiO2/色素/CH3CN, CeO2/H2O, LiCoO2界面など)の平衡状態・化学反応を、予言性の高いDFT-MDサンプリングを用いて解析し、一般的な原理の抽出に取り組んできた。本講演では、特に光触媒系のTiO2/H2O界面に焦点を当てながら、界面の酸化還元反応性の考察について紹介する。

    researchmap

  • 「京」を用いた二次電池・太陽電池化学反応の第一原理MDシミュレーション

    館山 佳尚

    次世代計算化学技術セミナー  2014.5 

     More details

    Language:Japanese  

    1:第一原理分子動力学法と酸化還元反応の記述 DFT-MDと酸化還元電位計算手法 2:LIB負極付近の電解液還元分解・重合の添加剤効果の解明 DFT-MDとBlue-moon ensemble 自由エネルギー法 3:LIB高機能電解液の還元耐性メカニズムの解明 DFT-MDと統計力学計算 4:LIB正極ー固体電解質界面の解析 DFT+U計算 5:DSC TiO2/Ru色素/電解液界面状態の解析 DFT-MDと線形応答TDDFT励起エネルギー計算 6:まとめ

    researchmap

  • Acetonitrile Solution Effect on Ru N749 Dye Adsorption and Excitation at TiO2 Anatase Interface

    館山 佳尚, 大谷 優介, 相川 小春, 韓 礼元, 袖山 慶太郎

    The 3rd Tsukuba Workshop on Organic Photovoltaics  2014.6 

     More details

    Language:Japanese  

    Although the organic-inorganic hybrid perovskites have emerged as solar cells with higher efficiency, the interfacial chemistry of conventional Ru dyes at TiO2 - acetonitrile interfaces in dye-sensitized solar cells (DSCs) is still an issue of fundamental importance. We then investigated stable structures and photoexcitation character of Black Dye (BD; Ru N749 dye) adsorption to TiO2 anatase (101) interface immersed in bulk acetonitrile (AN) solution, a most representative DSC system. Density functional theory based molecular dynamics (DFT-MD) with explicit solvent molecules was used to take into account the fluctuations of solvation shells and adsorbed molecules. We have also combined time-dependent DFT calculations of the excitation energies and oscillator strengths for the discussion o

    researchmap

  • DFT Simulation Study on Reactions in Electrolyte and at Electrode-Electrolyte Interface in Lithium Ion Battery

    TATEYAMA, Yoshitaka

    The Eighth International Conference on the Science and Technolog  2014.6 

     More details

    Language:English  

    We carried out DFT-MD free energy calculations of the reductive decompositions of the carbonate-based electrolytes on the K computer, the flagship supercomputer in Japan, focusing on the thermodynamics as well as the kinetics. The reaction mechanisms in a novel type of superconcentrated electrolytes were examined with the same techniques as well. We then succeeded in theoretically elucidating, on the atomic scale, the reductive reaction mechanisms of the electrolyte molecules toward the SEI formation for the first time. Recently, we have also investigated the Li-ion behavior at oxide cathode/solid electrolyte interfaces and the effect of the buffer layers [3]. These new findings will contribute to the development of LIBs with higher performance, better safety and longer cycle life.

    researchmap

  • 「京」で行う充電池材料開発〜スマホから電気自動車に向けて〜

    館山 佳尚

    スーパーコンピュータ「京」を知る集いin熊本  2014.2 

     More details

    Language:Japanese  

    「京」コンピュータを利用した充電池材料開発を一般の方々に分かりやすく説明しながら、スーパーコンピュータの必要性を広く知らしめる。

    researchmap

  • Novel mechanism of reductive decomposition of electrolyte in LIB: A DFT free energy analysis on K computer

    TATEYAMA, Yoshitaka

    MANA International Symposium 2014  2014.3 

     More details

    Language:English  

    Solid electrolyte interphase (SEI) on the electrode - electrolyte interfaces formed through the reductive decomposition of organic solvent molecules plays a crucial role in the stability and capability of lithium ion battery (LIB). Additives to the electrolyte often exhibit a large impact on the SEI quality. A typical example is vinylene carbonate (VC) additive to the ethylene carbonate (EC) solvent. Here we investigated the effects of VC additive to the EC solvent on the reductive decomposition and the initial stage of SEI formation. We focused on the thermodynamics as well as the kinetics of the possible processes. We used density functional theory based molecular dynamics (DFT-MD) with explicit solvent molecules for the equilibrium properties, and carried out the fre

    researchmap

  • 京で行う充電池材料開発〜スマホから電気自動車まで〜

    館山 佳尚

    第2回TUT-CMSI見える化シンポジウム“電子を魅せる”  2014.3 

     More details

    Language:Japanese  

    私たちは高精度計算が可能な第一原理分子動力学法と化学反応の自由エネルギー計算手法を融合させた計算技術を世界で初めてLIBに適用し、典型的な電解液内での還元分解過程とSEI膜の素材となる重合過程を原子・分子レベルで明らかにしました。発見した反応機構はいまだに謎が多いLIBの電解液分解と SEI膜形成過程の理解を増進するものとなっています。これらの計算は、一般のスーパーコンピュータでは実施が困難でしたが、京コンピュータを利用することにより短期間で素早く実行することができました。私たちの研究は、より高機能なSEI膜や高性能・高安全性をもたらす新しい電解液・添加剤の開発に対して京コンピュータ計算が十分貢献できることを示すものとなっています。

    researchmap

  • Theoretical study on structures and electronic states of boron-doped diamond (BDD) electrode/water interfaces

    TATEYAMA, Yoshitaka, FUTERA, Zdenek, Takeshi Watanabe, Yasuaki Einaga

    International Symposium on Diamond Electrochemistry  2014.3 

     More details

    Language:English  

    In this work we have investigated the reactivity of BDD surfaces and interfaces based on their structural and electronic properties, by using DFT based computational techniques. Focusing on the (111) facet, we compare the electronic states between the BDD and un-doped diamond with different terminations (see Fig. 1 for H-terminated model). Performing calculations on these models we found that there are unoccupied surface state (SS) located in the upper part of the band gap on H-terminated surface, while on the surface covered by oxide or hydroxyl groups these states are in lower part of the gap close to valence band edge.

    researchmap

  • レア・イベントの理論科学:物性科学からの取り組み

    館山 佳尚

    第1回レア・イベント理論科学ワークショップ  2013.10 

     More details

    Language:Japanese  

    電極界面のレア・イベントに対する第一原理統計力学理論凝縮系光励起に関するレア・イベントの動的相関電子状態理論構造変化に関するレア・イベントのサンプリング理論

    researchmap

  • 第一原理計算が示唆する正極、固体電解質およびその界面の微視的イオン輸送機構 Invited

    館山佳尚

    第421回電池技術委員会  2024.6 

     More details

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    researchmap

  • 「京」を用いたLIB電解液の還元分解から膜形成にいたる過程の反応解析

    館山 佳尚

    第7回 CMSI産官学連続研究会  2013.11 

     More details

    Language:Japanese  

    1:緒言:Lithium Ion Battery (LIB)、Solid Electrolyte Interphase (SEI)電解液(溶媒・添加剤)の還元分解2:手法・計算:DFT-MD、卑電位モデル、Blue-Moon Ensemble、京コンピュータ3:結果・考察:溶媒和、電子親和力、1電子還元、2電子還元、ラジカル攻撃4:まとめ:

    researchmap

  • DFT studies on adsorption and excitation of TiO2/Ru dye/CH3CN interfaces

    TATEYAMA, Yoshitaka

    International Conference on Dye-sensitized Solar Cell  2013.11 

     More details

    Language:English  

    “deprotonated 2-anchor” modes are most stable for BD adsorption at TiO2 anatase/AN interface. But a certain amount of “protonated 1-anchor” is comparable. AN plays a crucial role of solvation, control of TiO2 & BD dipole, and adsorption stability. Regarding the NIR region absorption of BD, “protonated 1-anchor” seems more responsible. “Deprotonated 2-anchor” has larger driving force of electron injection. For theoretical discussion on the injection and back ET, “combination of TDDFT excitation & DFT PDOS” seems more relevant than the conventional DFT HOMO-LUMO argument.

    researchmap

  • Nanometer-size Na cluster formation in micropore of hard carbon suggested by DFT calculations Invited

    Yoshitaka Tateyama

    UK-Japan Next-Generation Batteries Seminar  2024.7 

     More details

    Language:English   Presentation type:Oral presentation (invited, special)  

    researchmap

  • A DFT-MD Analysis of Redox Reaction at Solid-Electrolyte Interface in Battery and Solar Cell

    TATEYAMA, Yoshitaka

    5th JCS International Symposium on Theoretical Chemistry  2013.12 

     More details

    Language:English  

    Solid electrolyte interphase (SEI) formed through the reductive decomposition of electrolyte molecules plays a crucial role in the performance and stability of lithium-ion battery (LIB). Here we investigated the additive effects on the reductive decomposition, using a typical electrolyte system with ethylene carbonate (EC) solvent and vinylene carbonate (VC) additive. We focused on both thermodynamics and kinetics of the possible processes, and used DFT molecular dynamics with explicit solvent as well as Blue-moon ensemble technique for the free energy change.

    researchmap

  • TiO2ルチル・アナターゼ/水界面における光触媒反応性のDFT-MD解析

    館山 佳尚

    第20回記念シンポジウム光触媒反応の最近の展開  2013.12 

     More details

    Language:Japanese  

    我々はこのTiO2界面における酸化還元・電子移動過程の理解と効率向上への指針探索を目標に、第一原理分子動力学計算を用いたTiO2/H2O界面の微視的状態に関する理論研究を行った。光触媒機能は湿潤環境下で大きく発現することから、特にバルクの水がTiO2面上に存在する場合に焦点をあてた。一般にアナターゼ型(101)面が他の面やルチル型表面よりも効率が良いと考えられていることを念頭に、その理由を探るべく、アナターゼ型(101)面および(001)面とルチル型(110)面などの比較にも取り組んだ。その結果、従来信じられているものとは異なる反応メカニズムがもっともらしいという結果を得た。

    researchmap

  • Photoexcitation induced electron-nucleus dynamics by real-time propagation TDDFT(RTP-TDDFT)

    TATEYAMA, Yoshitaka, OYAMA, Norihisa, OHNO, Takahisa, MIYAMOTO Yoshiyuki

    Symposium on Progress and Future Prospects in Molecular .....  2006.6 

     More details

    Language:English  

    With the viewpoint of evaluating the ability of this RTP-TDDFT scheme, we have examined prototypes of photoinduced structural transformations: The photoinduced ring-opening transformation in crystalline benzene and the trans-cis photoisomerisation of azobenzene molecule.

    researchmap

  • 第一原理計算によるTiO2/H2O界面の原子スケール解析

    館山 佳尚

    第12回光触媒研究討論会  2012.7 

     More details

    Language:Japanese  

    理論計算の立場から界面酸化還元反応メカニズム解明し、触媒研究の技術的ブレークスルーに貢献

    researchmap

  • Mg3Bi2合金負極の表面および欠陥に関する第一原理計算解析

    カークム ジェームス, クリストファー, 濱田 幾太郎, 桑田紘子, 松井雅樹, 館山 佳尚

    第58回電池討論会  2017.11 

     More details

    Language:Japanese  

    ポストLiイオン電池の一つとしてMgイオン電池(MIB)が注目を集めている。金属負極を考える場合、Liイオン電池(LIB)に匹敵する体積エネルギー密度を原理的に有し、またデンドライト形成がされないことから、性能面、安全面で利点が存在する。一方、このMg金属負極は不動態膜に容易に覆われ、Mgイオンの高効率な溶解・析出が実際にはかなり難しいという問題がある。このMg金属の代替負極として、筆者の一部がMg3Bi2合金の利用可能性を提案している1。このMg3Bi2は適当な条件を選ぶと安定した溶解・析出挙動を示す。しかしながら、その微視的機構ついてはまだよくわかっておらず、溶解・析出挙動の基礎的理解もままならない。本研究では特に表面および表面近傍の欠陥に着目した包括的な第一原理計算解析を実行し、Mg3Bi2負極におけるMgイオンの挿入・脱離について考察を行った2

    researchmap

  • New ab-initio MD methods for redox (electron transfer) reaction in solution

    館山 佳尚

    生物物理化学理論研究室講演会  2006.2 

     More details

    Language:Japanese  

    酸化還元反応は多くの興味深い現象ー腐食、(燃料)電池、触媒、光合成などーの重要な素過程となっている。しかし酸化還元反応の諸物理量ー酸化還元電位などーを第一原理的に計算する手法は今までなかった。この問題に対し、我々は最近2つの新しい第一原理分子動力学手法ー「grand-canonical DF-MD」及び「DF-MD +Marcus energy gap law」ーを開発し、その有効性を確認した。本講演ではその手法論及び水溶液中の遷移金属錯体系を用いた精度検証について報告する。

    researchmap

  • Grignard Reagent Based Electrolytes in Magnesium-Ion Battery : A First-Principles Study

    CHOUDHARY, Ashu, SODEYAMA, Keitaro, TATEYAMA, Yoshitaka

    19th International Meeting on Lithium Batteries  2018.6 

     More details

    Language:English  

    Magnesium-ion batteries (MIBs) have gained considerable attention as an alternative energy storage to Li-ion batteries in the past few decades [1,2]. Grignard reagent (R-Mg-X: X=halogen) with ether has been one of the most studied and efficient solutions for MIB. However, the microscopic behaviours in the electrolyte solution are still under debate. To gain insight of the solvation on the atomic scale, we performed the first-principle molecular dynamics samplings of such MIB electrolytes using the CPMD code. The study was also motivated for understanding the fundamental mechanisms of electrolytes for 2+ cation and the underlying differences instead of 1+ cation. We carried CPMD simulations of a single R-Mg-X (where R=Methyl, Ethyl and Phenyl) in different cubic boxes with 44 tetrahydrofura

    researchmap

  • 第一原理計算&#8226;微視的反応論&#8226;反応工学に基づくメタン酸化カップリング活性と選択性の理論予測

    石川 敦之, 館山 佳尚

    第12回分子科学討論会  2018.9 

     More details

    Language:Japanese  

    Oxidative coupling of methane (OCM), an important catalytic reaction in natural gas utilization, has been studied by theoretical approach. The OCM using Li-doped magnesia was examined here. The kinetic parameters such as activation energy or reaction energy was calculated by first principle density functional theory, and these are used in the further microkinetics and reactor simulations. We clarified that higher CH4 conversion can be achieved with the help of the Li doping, since O atom next to Li is effective in abstracting H atom from CH4. Also, the selectivity of C2 compounds against the total combustion pathway (CO and CO2 formation) will be discussed.

    researchmap

  • Structure Search and Property Analysis of Interfaces between LiCoO2 Cathode and Sulfide Electrolyte in Solid-State Battery via DFT-CALYPSO Method

    GAO, Bo, JALEM, Randy, Yanming Ma, TATEYAMA, Yoshitaka

    International Workshop COMDI2018  2018.9 

     More details

    Language:English  

    Solid-state lithium-ion batteries (SS-LIBs) is of great interest because of its high safety and high energy density in comparison to traditional liquid electrolytes based batteries. However, there is a crucial issue about the interface resistance between the cathode and electrolyte in many SS-LIBs, which hinders the performance of batteries. To understand the microscopic mechanism of the interface resistance, we have been working on the DFT calculation analysis of the cathode &#8211; solid electrolyte interfaces with a systematic structure search. However, the explorations were still insufficient. Note that solid-solid interfaces seem more difficult than solid-liquid ones from a viewpoint of search for metastable structures. In this study, we utilized the CALYPSO structure prediction ap

    researchmap

  • 第一原理計算と微視的反応速度論に基づく理論計算によるメタン酸化カップリングの活性と選択性の予測

    石川 敦之, 館山 佳尚

    第122回触媒討論会  2018.9 

     More details

    Language:Japanese  

    Oxidative coupling of methane (OCM), an important catalytic reaction in natural gas utilization, has been studied by theoretical approach. The OCM using Li-doped magnesia was examined here. The kinetic parameters such as activation energy or reaction energy was calculated by first principle density functional theory, and these are used in the further microkinetics and reactor simulations. We clarified that higher CH4 conversion can be achieved with the help of the Li doping, since O atom next to Li is effective in abstracting H atom from CH4. Also, the selectivity of C2 compounds against the total combustion pathway (CO and CO2 formation) will be discussed.

    researchmap

  • Surveying Ilmenite Type 4d Transition Metal Oxides for Na Ion Battery Cathodes with High Potential and High Capacity

    ALASSADI, HusseinNaseefMohammad, Masafumi Okubo, Atsuo Yamada, TATEYAMA, Yoshitaka

    IMLB 2018 - The 19th International Meeting on Lithium Batteries  2018.6 

     More details

    Language:English  

    We present a comprehensive density functional study screening the full range of ternary hexagonal layered compounds of ilmenite type structure (space group 148, R-3) that consist of Na, O and 4d transition metal (TM) elements in search for candidates with high potential and large capacity for sodium ion battery cathodes.Computationally, we treated the exchange correlation functional with GGA+U formalism. U term was particularly fine-tuned to reproduce the electrochemical potential of Na extraction in NaxRuO3 compound for which measurements exist. We found that U = 2 eV fulfils this criterion and moreover it produces an electronic structre that resembles the one obtained with higher level HSE03 functional.

    researchmap

  • Reversible O redox in Layered Hexagonal Transition Metal Oxides for Na Ion Battery Cathodes with High Potential and High Capacity

    ALASSADI, HusseinNaseefMohammad, Masafumi Okubo, Atsuo Yamada, TATEYAMA, Yoshitaka

    ACEMD18, Australian Computationally enhanced Materials Design 18  2018.7 

     More details

    Language:English  

    Increasing the capacity of Na ions batteries is a highly desired industrial goal. One possible way of achieving such an increase is evoking reversible oxygen redox that would add extra capacity to that of transition metal (TM) redox. To understand the atomistic origin of the O redox, we carried out a comprehensive density functional study of the electronic properties of the R-3m Na2RuO3 (space group 166) and R-3 Na1RuO3 (space group 148) as shown in Figure 1. It was speculated that these compounds undergo reversible O redox which increases the capacity by 40% beyond the TM redox capacity to an impressive value of 180 mA.h/g. We then screened the full range of ternary R3 &#773; compounds that consist of Na, O and 4d transition metal (TM) elements in search for candidate compositions with hi

    researchmap

  • NO + CO Reaction on Rh Surface: First Principle Density Functional Theory Investigation Combined with Microkinetic Analysis

    ISHIKAWA, Atsushi, TATEYAMA, Yoshitaka

    Pre-conference of TOCAT8 and 5th International Symposium of ICAT  2018.8 

     More details

    Language:English  

    In this study, the NO + CO reaction on Rh surface is studied, as this reaction is widely used as a model reaction on the NOx reduction by the three-way catalyst. Density functional theory (DFT) calculation combined with microkinetic analysis was used. We assumed that the catalysis cycle consists of the following elementary reaction steps; NO dissociation, N2O formation, N2 formation, and CO2 formation. Here, the adsorption energies, reaction energies, and activation energies were all evaluated with the DFT calculations.

    researchmap

  • Molecular dynamics simulation of water dynamics at the water/solid interface of ceria-supported Pt clusters

    SZABOVA, Lucie, Farnesi Camellone Matteo, Negreiros Ribeiro Fabio, TATEYAMA, Yoshitaka, Fabris Stefano

    TOCAT8 (The 8th Tokyo Conference on Advanced Catalytic Science a  2018.8 

     More details

    Language:English  

    The present work is a theoretical analysis based on density functional theory (DFT) and ab initio molecular dynamics (AIMD) simulations investigating the physical and chemical properties of H2O/Pt6/CeO2 material. Water-ceria interface exhibits increased H2O dissociation and partial surface hydroxylation of the CeO2 surface. The hydroxylated surface allows for fast proton diffusion along the water-ceria interface which promotes a transfer of OH molecules towards adsorbed Pt nanoparticle. The presence of water solvent induces charge reorganization at the Pt-ceria material creating new active centers for OH adsorption.

    researchmap

  • Revisiting Grignard reagent based electrolytes in magnesium-ion battery : a first-principles study

    CHOUDHARY, Ashu, SODEYAMA, Keitaro, TATEYAMA, Yoshitaka

    International Battery Association 2018  2018.3 

     More details

    Language:English  

    Magnesium-ion batteries (MIBs) have gained considerable attention as an alternative energy storage to Li-ion batteries in the past few decades [1,2]. Grignard reagent (R-Mg-X: X=halogen) with ether has been one of the most studied and efficient solutions for MIB. However, the microscopic behaviours in the electrolyte solution are still under debate. To gain insight of the solvation on the atomic scale, we performed the first-principle molecular dynamics samplings of such MIB electrolytes using the CPMD code. The study was also motivated for understanding the fundamental mechanisms of electrolytes for 2+ cation and the underlying differences instead of 1+ cation. We carried CPMD simulations of a single R-Mg-X (where R=Methyl, Ethyl and Phenyl) in different cubic boxes with 44 tetrahydrofura

    researchmap

  • DFT-MD study on highly salt-concentrated electrolytes: A new class of battery electrolytes

    TATEYAMA, Yoshitaka

    CECAM Workshop “Electrostatics in Concentrated Electrolytes”  2018.3 

     More details

    Language:English  

    We investigated the mechanism of unusual electrochemical stability and ion diffusion of Li-TFSA and Li-FSA salts in AN solvents by using DFT-MD sampling. TFSA anion sacrificially accepts a reductive electron and dissociates the CF3 moiety, instead of AN solvents. AN decomposition, observed experimentally, dose not proceed by 1e reduction but 2e reduction is required. Ion diffusion calculations of LiTFSA and LiFSA indicate that, in HC conditions, the Stokes’ Law doesn’t seem to hold, and the transport number of Li increases. This suggests that there are non-conventional Li+ diffusion mechanisms in HC condition.

    researchmap

  • Combining Materials Modelling and Informatics Techniques for Efficient Search of Fast Lithium Ionic Conductors for All-Solid-State Battery Application

    JALEM, Randy, TATEYAMA, Yoshitaka, NAKAYAMA, Masanobu

    International Battery Seminar and Exhibit  2018.3 

     More details

    Language:English  

    In here, we present our recent efforts aimed towards the development of an effective and efficient search/screening workflow for fast lithium ionic conductors. We highlight our developed general representation schemes (accounting for cell periodicity, atom ordering, and number of atoms) for inorganic compounds or crystalline solids, demonstrating their predictive power for various DFT-calculated material properties such as cohesive energy, material density, electronic band gap energy, and thermodynamic decomposition energy. We also present our informatics-aided DFT-based screening of a chemical search space with olivine- and tavorite-type structures and with ion migration energy and thermodynamic stability as criteria.

    researchmap

  • First-Principles Study on the Microscopic Origin of Interfacial Resistance between Oxide Cathode and Sulfide Electrolyte in All Solid State Battery

    TATEYAMA, Yoshitaka, Jun Haruyama, SODEYAMA, Keitaro

    2018 MRS Spring Meeting & Exhibit  2018.4 

     More details

    Language:English  

    We have investigated those properties such as potential origins of the interfacial resistance (e.g. space-charge layer model, reaction layer model) as well as the buffer layer effect by using first-principles DFT+U calculations [2.3]. As a representative model system, LiCoO2 (LCO), β-Li3PS4 (LPS), and LiNbO3 (LNO) were selected for cathode, sulfide electrolyte, and buffer layer, respectively. We carried out first-principles calculations of the several possible interface configurations and obtained the stable structures and the electronic states. Besides, we calculated the sitedependent Li chemical potentials with respect to Li metal. The results indicate that the Li depletion can proceed at the beginning of the charge process, which may correspond to the space-charge layer scenario, and t

    researchmap

  • 層状化合物NaxMO3 (M=4d遷移金属)の酸素レドックスに関する理論計算研究

    アルアサディ フセインナシーフモハマド, 大久保將史, 山田淳夫, 館山 佳尚

    第58回電池討論会  2017.11 

     More details

    Language:Japanese  

    ナトリウムイオン電池は、構成元素の資源的優位性のみならず、リチウムイオン電池と類似した動作機構を持つこと、高速イオン伝導が期待されることなどから、ポストリチウムイオン電池の一つして注目を集めている。しかし、リチウムイオン電池に匹敵する高電圧・高容量を得ることが難しく、エネルギー密度が十分に確保できないことが実用化を阻む要因の一つとなっている。問題解決に向け、現在様々な正極・負極の開発が行われており、筆者らは酸化物イオンのレドックス反応による安定な付加容量を示すNa過剰正極Na2-xRuO3 (x=0-1.5)を見出した1。本材料は充放電中に構造崩壊を一切起こさないためモデル系として最適であり、第一原理計算を用いて酸化物イオンが寄与する付加容量の起源を明らかにした上で、他の4d遷移金属酸化物を基本とする新規高容量正極材料の探索を試みた2。

    researchmap

  • DFT molecular dynamics sampling studies on battery phenomena and materials on the atomic scale

    TATEYAMA, Yoshitaka

    4th International Conference on Advanced Electromaterials  2017.11 

     More details

    Language:English  

    Search for batteries with better performance (larger energy density) and more reliability (more safety) has been extensively carried out for decades. However, the atomistic mechanisms of chemical (redox) reactions and ion transports in batteries have not been fully understood yet, because of the difficulty in the in-situ measurements. A long-standing issue is SEI (solid electrolyte interphase) properties and its formation mechanism at negative electrode &#8211; organic electrolyte interface at the first charging, which really determines the performance and reliability of the battery. Recently, a novel concept of superconcentrated liquid electrolyte has been proposed and attracted much attention as promising future electrolytes.

    researchmap

  • Computational Study on Electrolytes based on Grignard Reagents for Magnesium-Ion Battery

    チョーダリー アシュ, 袖山 慶太郎, 館山 佳尚

    ポスト「京」重点課題5 第4回公開シンポジウム  2017.12 

     More details

    Language:Japanese  

    Magnesium-ion batteries (MIBs) have gained considerable attention as an alternative energy storage to Li-ion batteries in the past few decades [1,2]. Grignard reagent (R-Mg-X: X=halogen) with ether has been one of the most studied and efficient solutions for MIB. However, the microscopic behaviours in the electrolyte solution are still under debate. To gain insight of the solvation on the atomic scale, we performed the first-principle molecular dynamics samplings of such MIB electrolytes using the CPMD code. The study was also motivated for understanding the fundamental mechanisms of electrolytes for 2+ cation and the underlying differences instead of 1+ cation. The compatibility of electrolyte for reversible dissolution/deposition of Mg2+ is the most important factor to determine Coulomb

    researchmap

  • 有機電解液系に向けたDFT-MDに対するvdw相互作用の検証

    飯塚 将太, 館山 佳尚

    ポスト「京」重点課題5 第4回公開シンポジウム  2017.12 

     More details

    Language:Japanese  

    2次電池や太陽電池といったエネルギーを変換、貯蔵する系の電解液には、しばしば有機液体が用いられる。放電、充電といった有機分子の反応のメカニズムを理解するには、原子スケールの分子動力学計算が欠かせない。同時に、有機電解液系では、van der Waals (vdW)相互作用が非常に重要な役割を果たすので、密度汎関数理論における標準的な交換-相関汎関数であるPBEを用いた第一原理分子動力学法においても、vdW相互作用を考慮する必要がある。第一原理分子動力学ソフトウェアstat-CPMDには、DFT-D2の枠組みを用いてvdW相互作用を考慮した計算が可能だが、新たに精度の高いDFT-D3を導入した。まず、固体アルゴンやベンゼンダイマーなど、基礎的な固体、分子について、分子間距離や固体密度の計算を行い、DFT-D3を含めたエネルギーや、原子にかかる力が正しく計算されていることを確認した。また、水、および代表的な有機溶媒であるエチレンカーボネート(EC)とプ

    researchmap

  • NO + CO Reaction on Rh Surface: DFT Investigation Combined with Microkinetic Analysis

    ISHIKAWA, Atsushi, TATEYAMA, Yoshitaka

    The 7th JCS (Japan-Czech-Slovak) Symposium  2018.5 

     More details

    Language:English  

    In this study, the NO + CO reaction on Rh surface is studied, as this reaction is widely used as a model reaction on the NOx reduction by the three-way catalyst. Density functional theory (DFT) calculation combined with microkinetic analysis was used. We assumed that the catalysis cycle consists of the following elementary reaction steps; NO dissociation, N2O formation, N2 formation, and CO2 formation.

    researchmap

  • DFT+U and molecular dynamics study of H2O interaction with metal/ceria materials

    SZABOVA, Lucie, Matteo Farnesi Camellone, Fabio Negreiros Ribeiro, TATEYAMA, Yoshitaka, Vladimir Matolin, Stefano Fabris

    JCS’18 (7th JCS Symposium, Prague)  2018.5 

     More details

    Language:English  

    Ceria-based materials have important applications in heterogeneous catalysis as well as for renewable energy technologies such as fuel cells. In this work we study the properties of ceria-supported Pt6 nanoparticle in water solution by the means of DFT+U and ab initio molecular dynamics calculations. We analyze the structure of the interfacial water layer and its effect on the structure and charge of the Pt nanoparticle. We show that the Grotthus-like mechanism for H/OH transfer along ceria surface observed on H2O/CeO2 interface allows for faster transport of OH molecules towards the active sites on the Pt cluster. The presence of water solvent induces charge reorganization at Pt-ceria material unlocking new stable active centers available for water adsorption/dissociation as well as promo

    researchmap

  • 固液界面酸化還元反応の理論的反応設計技術の構築

    館山 佳尚

    さきがけ・CREST合同領域会議  2008.9 

     More details

    Language:Japanese  

    理論面では固液界面系における標準酸化還元電位や電子移動の活性化自由エネルギーを定量的に記述できる新しい第一原理自由エネルギー計算手法の確立を行うことを主目標に、関連する固液界面の安定配置探索や先端計算手法を用いた光吸収・励起ダイナミクス解析にも取り組んでおります。応用面では、PCやDSSCに密接につながる酸化物・半導体電極/水溶液・電解質溶液系に焦点をあて、未だ不明な点が多い界面近傍の原子スケールでの構造・酸化還元反応過程の基礎的知見増大に取り組んでいます。本講演では最近取り組んだ(1)DSSC電解質溶液中の酸化還元反応メカニズム解析と(2)ダイヤモンド電極化学センサー界面の反応メカニズム解析について報告します。

    researchmap

  • Overestimation of excitation energy in DFT and TDDFT calculation

    館山 佳尚, 胡 春平, 大塚 教雄

    次世代ナノ情報機能・材料グループ成果報告会  2008.12 

     More details

    Language:Japanese  

    we have done a re-assessment of the conventional DFT-KS and TDDFT-LR formalisms for excitation energy, by using a transition metal oxide molecule as a test case.

    researchmap

  • Free energies of redox (electron transfer) reactions of iodides in solution

    TATEYAMA, Yoshitaka

    14th International Workshop on Computational Physics and Materia  2009.1 

     More details

    Language:English  

    I applied novel methods we have developed to redox reactions associated with iodide and triiodide ions in solution. My calculations of redox free energies and reaction pathways of several elementary processes of this redox couple indicate that reduction and bond breaking are competitive in the solvated triiodide systems and there seems a significant solvent dependence.

    researchmap

  • Ab initio MD study on redox reactions in electrolyte solution

    館山 佳尚

    特定領域「量子デザイン」A02班ミニワークショップ  2009.1 

     More details

    Language:Japanese  

    I applied novel methods we have developed to redox reactions associated with iodide and triiodide ions in solution. My calculations of redox free energies and reaction pathways of several elementary processes of this redox couple indicate that reduction and bond breaking are competitive in the solvated triiodide systems and there seems a significant solvent dependence.

    researchmap

  • Ab initio MD strudy on properties of diamond/water interface

    館山 佳尚, 渡辺剛志, 栄長泰明

    日本物理学会2009年春季大会  2009.3 

     More details

    Language:Japanese  

    我々はこのダイヤモンド電極/水溶液界面で起こる酸化還元反応メカニズムの電子・原子スケールからの理解を目標に、第一原理MDを用いた理論的かつ定量的反応解析にも取り組んだ。その第一段階として固液界面スラブモデルを用いて、ボロンドープ量・界面構造・電解質種類の異なる様々な条件における室温下での(準)安定界面構造およびその電子状態を計算した。

    researchmap

  • Computational study on influence of vacancy-related defects accumulation on hydrogen embrittlement of steels

    大野 隆央, 浅利 裕介, 籾田 浩義, 中村 美道, 館山 佳尚

    鉄鋼材料の革新的高強度・高機能化基盤研究開発第1回シンポジウム  2009.4 

     More details

    Language:Japanese  

    高強度材料の信頼性を高めるためには、水素脆化による低温遅れ破壊防止の設計指針構築が重要な課題であり、実材料中の様々な欠陥組織因子にトラップされた水素を定量的に分離し評価することが強く求められる。本研究では、粒界水素偏析量の定量的評価に資することを目的に、粒界と競合する代表的な水素トラップ因子である空孔・空孔集合体における水素存在状態、及び偏析量を大規模第一原理計算により定量的に解析した。その結果、空孔への水素トラップエネルギーや水素と空孔の相互作用などに関する定量的評価を獲得し、空孔集合体の形成メカニズムと、それに対する水素の効果を明らかにした。また、結晶粒界の引張強度に対する水素、空孔、及び水素空孔複合体の偏析による効果を調べ、原子レベルの粒界水素脆化メカニズムを考察した。

    researchmap

  • Ab initio MD study on redox reactions in electrolyte solution of DSSC

    TATEYAMA, Yoshitaka

    MANA International symposium 2009  2009.2 

     More details

    Language:English  

    We have applied these methods to redox reactions associated with triiodide (I3-) and iodide (I-) ions in typical electrolyte solutions of dye-sensitised solar cell (DSSC). In spite of many applications as electrolyte, the atomistic mechanisms of these iodide redox reactions have not been fully understood due to the complex nature involving multiple electron transfers and bond changes.

    researchmap

  • Ab initio free energy approach to redox reaction in solution and on solid/solution interface

    TATEYAMA, Yoshitaka

    2009 WPI-AIMR annual workshop  2009.3 

     More details

    Language:English  

    We have applied novel methods to redox reactions of transition metal complexes in aqueous solution, and successfully demonstrated their accuracy on standard redox potential and reorganization energy. Recently we have been examining redox reactions with an explicit semiconductor/water interface as well, which is still underway. Irrespective of the approximation of electric double layer, reasonable results are obtained concerning the structural stability, while the treatment of carrier control seems to need further development.

    researchmap

  • Development of order-N DFT methods and the applications on nano materials

    大野 隆央, 宮崎 剛, 木野 日織, 西野 正理, 奈良 純, 館山 佳尚, 大塚 教雄

    特定領域「次世代量子デザイン」第4回成果報告会  2009.3 

     More details

    Language:Japanese  

    科研費特定領域「次世代量子シミュレータ・量子デザイン手法の開発」における研究課題「第一原理オーダーN手法の開発とナノ物質への応用」の平成20年度の研究成果を報告する。

    researchmap

  • All-Electron Calculation of Nonadiabatic Couplings from Time-Dependent Density Functional Theory (TDDFT)

    胡 春平, 杉野修, 館山 佳尚

    日本物理学会第64回年次大会  2009.3 

     More details

    Language:Japanese  

    非断熱結合係数(NAC)は非断熱過程において中心的な役割を果たす。しかし、NACの定義式が多体波動関数に基づいているため、長い間密度汎関数法(DFT)での取り扱いが困難だと考えられてきた。これに対して我々はTime-Dependent DFT線形応答理論に基づく計算が可能であろうと考え、計算式を導出し分子の基底状態と励起状態の間のNACを系統的に調べてきた。平面波擬ポテンシャル枠組みで実装したところ、CI法等の波動関数に基づく量子化学的方法に比べて効率的に計算を行うことができ、水素原子や一価元素では計算精度も良好であることが確認できた。他の元素では必ずしも計算精度が保証されず、それが少なくとも擬ポテンシャルに起因していることも明らかになった。そこで、今回全電子計算手法を開発し、TD-DFTによるNACの計算の妥当性を系統的に調べることとした。

    researchmap

  • Novel First-Principles Molecular Dynamics Method for Free Energy Analysis of Redox Reaction

    TATEYAMA, Yoshitaka

    MANA International Symposium 2008  2008.3 

     More details

    Language:English  

    For quantitative analysis of redox reactions, we have recently developed novel first-principles molecular dynamics methods based on density functional theory, statistical mechanics and Marcus theory of electron transfer.

    researchmap

  • Development of order-N DFT methods and the applications on nano materials

    大野 隆央, 宮崎 剛, 木野 日織, 西野 正理, 奈良 純, 館山 佳尚, 大塚 教雄

    特定領域研究「次世代量子シミュレータ・量子デザイン手法の開発と応  2008.3 

     More details

    Language:Japanese  

    超大規模解析が可能な第一原理オーダーN手法の開発を中心として、安定構造・反応経路探索法、伝導特性解析法、励起状態解析法等のナノ物質の解析に有効な手法の確立を目指した研究を遂行しており、超大規模シミュレーションにより、ナノ物質の新奇な物性・機能の量子論的な解析・予測、構造と機能の相関関係の解明、新奇な機能の設計とその実現のための構造の提案等、ナノ構造の機能探索・設計に関する量子論的研究を進めたので、その結果を発表する。

    researchmap

  • Overestimation of excitation energy in DFT and TDDFT calculations

    TATEYAMA, Yoshitaka, OOTSUKA, Takao, Leonardo Bernasconi, Michiel Sprik

    International Conference on Quantum Simulators and Design 2008  2008.5 

     More details

    Language:English  

    We have done a re-assessment of the conventional DFT-KS andTDDFT-LR formalisms for excitation energy, by using a transition metal oxide molecule as atest case. We found that (1) the KS orbital energy differences well reproduce the experimentalexcitation energies and (2) the LR-TDDFT overestimates the excitation energies significantly.In order to understand this extraordinary behaviour, we have investigated the contribution of solventwhich exists in the experimental observation as well as the pseudopotential and exchangecorrelationeffects in the calculations. It seems that electron correlation plays a certain role for that.

    researchmap

  • First-principles calculation of hydrogen-defect interaction in iron

    籾田 浩義, 浅利 裕介, 館山 佳尚, 大野 隆央

    日本金属学会2008年度秋季大会  2008.9 

     More details

    Language:Japanese  

    水素による鋼の脆性破壊は重要な問題であるが、特に電子・原子スケールにおける微視的な水素脆化メカニズムは完全な理解には至っていない。最近、鉄における原子空孔の重要性が理論および実験の両方から指摘されている。それらの結果によると、水素と空孔は互いに強く相互作用し、それらの複合体が安定化することが示されている。本研究では、第一原理計算を用いて、この複合体が相互に又は他の欠陥とどのように相互作用するかを調べた。計算の結果、バルク中においては複数の水素空孔複合体の間に強い相互作用が見出された。すなわち、それらが空間的に離れて存在するよりも、より大きなクラスターを形成する方がエネルギー的に安定である。空孔および水素空孔複合体が相互に又は他の欠陥とどのように相互作用するかを示し、より現実的な系における空孔の挙動を考察する。

    researchmap

  • Overestimation problem on excitation energy in the DFT/TDDFT framework

    館山 佳尚, 大塚 教雄, Sprik Michiel

    第2回分子科学討論会  2008.9 

     More details

    Language:Japanese  

    溶液効果を量子的に考慮した分子の光吸収スペクトルに対する理論計算の精度評価という動機のもと代表的な酸化剤である過酸化マンガンイオン(MnO−4 ) 水溶液の光吸収スペクトルについて水分子を露に取り扱ったDFTおよびTDDFT 計算を行なった。その結果TDDFT-BLYP レベルですでに励起エネルギーを過大評価し、非局所Hartree-Fock(HF) 交換項を入れるとそれが悪化するという結果を得た。この問題に焦点をあて議論する。

    researchmap

  • Theoretical formulation and accuracy evaluation of nonadiabatic couplings from time-dependent density functional theory

    胡 春平, 平井宏俊, 杉野修, 館山 佳尚

    第2回分子科学討論会  2008.9 

     More details

    Language:Japanese  

    断熱ポテンシャル面が交差する場合には非断熱結合係数(NAC)が無限大になるのでBorn-Oppenheimer近似は破綻する。このため交差付近では NAC項をあらわに考える必要がある。その計算には多体波動関数が必要になるためこれまでCIなどの量子化学の手法に頼ってきた。しかし、大規模な系を計算するためには、他の高効率な計算を用いる必要がある。この点に注目し、我々は時間依存密度汎関数法で分子の基底状態と励起状態の間のNACを計算する手法を開発した。講演ではまずKohn-Sham系に基づくNACの厳密な計算式を示し、次に拡張線形応答理論を用いた精度の改善について述べる。テスト計算の結果、単純な分子ではCI並みの精度が達成されることが分かった。

    researchmap

  • Ab initio molecular dynamics study on iodide redox (electron transfer) reactions in solution

    TATEYAMA, Yoshitaka

    The 1st International Conference of the Grand Challenge to Next-  2008.6 

     More details

    Language:English  

    We have applied these methods to redox reactions associated withiodide (I−) and triiodide (I−3 ) ions in solution. These iodides are oftenused as a redox couple in several applications. Also they are related tofamous iodine titration. However the atomistic mechanisms of the redoxreactions haven’t been fully understood. There are some issues such asthe symmetry breaking of solvated I−3 , I-I bond breaking coupled to ET, and so on. Our calculationsof redox potentials of the elementary processes imply that the reduction of triiodide is a trigger of theseries of processes in aqueous solution.

    researchmap

  • Ab initio study on hydrogen-defect interaction in alpha-Fe and its role in hydrogen embrittlement

    MOMIDA, Hiroyoshi, ASARI, Yusuke, TATEYAMA, Yoshitaka, OHNO, Takahisa

    2008 International Hydrogen Conference  2008.9 

     More details

    Language:English  

    Microscopic mechanism of the hydrogen embrittlement of steel has not been fully understood especially at the atomic and electronic scale. Recently, importance of vacancies was pointed out. Aim of this study is to clarify the behavior of the hydrogen atoms, the iron vacancies, and their complexes in the alpha-Fe, and to show their effects onto the mechanical properties by means of ab initio calculations. In the bulk, the clusters consisting of the hydrogen-vacancy complexes are proven to be energetically more stable than those being separately. The results also indicate that the hydrogen, the vacancies, and the complexes are energetically more stable on the grain boundaries than in the bulk region. We discuss their effects onto the mechanical properties.

    researchmap

  • Ab-initio MD Methods for Free Energies of Chemical Reactions Coupled to Electron Transfer

    TATEYAMA, Yoshitaka, Jochen Blumberger, Michiel Sprik

    WATOC2008  2008.9 

     More details

    Language:English  

    “Redox reactions”, play crucial roles in diverse topics such as battery, fuel cell, catalysis, corrosion, photosynthesis, Fundamental aspects of redox reactions are characterised by free energies in which electronic states and structural ensemble play crucial roles. However, few methods can take both into account. We have developed ab-initio methods for free energy calculation of redox reactions, namely electron transfer and change of chemical bonds:Density-Functional Molecular Dynamics Energy gap (DF-MD-EG) method, DF Constrained MD EG (DF-CMD-EG) method. We have demonstrated that both DF-MD-EG and DF-CMD-EG methods enable us to do quantitative calculation of redox free energies energies & estimation of probable reaction pathways even for complicated redox reactions.

    researchmap

  • Ab-initio MD simulation study on trihalides in solution

    館山 佳尚

    日本物理学会2008年秋季大会  2008.9 

     More details

    Language:Japanese  

    本研究では第一原理MDシミュレーションを用いて水溶液中のX3-イオン(X=Cl,Br,I)の平衡構造・電子状態をまず求めた。さらに結合・解離反応中の水和構造の効果を検討すべく、X-, X2イオン水溶液との比較も行なった。さらにヨウ素に焦点をあて電子移動反応、化学結合変化に対する反応自由エネルギーを我々が最近開発した第一原理拘束MDエネルギーギャップ法[1]を用いて解析した。

    researchmap

  • Ab Initio Study on Adsorption Structure and Decomposition Reactions of Electrolytes on the LiNi0.5Mn1.5O4

    OKUNO, Yukihiro, USHIROGATA, Keisuke, SODEYAMA, Keitaro, TATEYAMA, Yoshitaka

    Car-Parrinello Molecular Dynamics in 2017 (CPMD2017)  2017.10 

     More details

    Language:English  

    Electrolyte decomposition on the “cathode” surfaces in Li-ion batterieshave recently attracted much attention from a viewpoint of batterydegradation and cathode solid electrolyte interphase (SEI or CEI). Adoptingthe lithiated and delithiated spinel-type LiNi0.5Mn1.5O4 (LNMO) cathodes asmodel systems, we have investigated the adsorption configurationdistribution of ethylene carbonate (EC) electrolyte as well as the ECdecomposition reactions on the LNMO (100) surface, by using densityfunctional theory (DFT) calculations. DFT molecular dynamics simulationsindicate that the EC solvent molecules have some characteristicorientations for the adsorption, which is in good agreement with theexperimental observations. Such multiple adsorption manners give rise toseveral EC decomposition

    researchmap

  • First-Principles Study on Semiconductor / Liquid Interfaces for Energy and Environmental issues

    館山 佳尚

    The 3rd GREEN symposium  2012.2 

     More details

    Language:Japanese  

    For the last years, we have explored possible interfacial structures and electronic states of TiO2/liquid water interfaces for PC and TiO2/liquid acetonitrile for DSC under thermal equilibrium, by using density functional theory based molecular dynamics (DFTMD) analysis. With the averaged electronic states and the view of semiconductor junctions involving electric double and space-charge layers, we have discussed possible pathways of the charge transfer processes.

    researchmap

  • Car-Parrinello Molecular Dynamics (CPMD) Study on Electrolytes based on Grignard Reagents for Magnesium-Ion Battery

    CHOUDHARY, Ashu, SODEYAMA, Keitaro, TATEYAMA, Yoshitaka

    Car-Parrinello Molecular Dynamics in 2017  2017.10 

     More details

    Language:English  

    Magnesium-ion batteries (MIBs) have gained considerable attention as an alternative energy storage to Li-ion batteries in the past few decades [1,2]. Grignard reagent (R-Mg-X: X=halogen) with ether has been one of the most studied and efficient solutions for MIB. However, the microscopic behaviours in the electrolyte solution are still under debate. To gain insight of the solvation on the atomic scale, we performed the first-principle molecular dynamics samplings of such MIB electrolytes using the CPMD code. The study was also motivated for understanding the fundamental mechanisms of electrolytes for 2+ cation and the underlying differences instead of 1+ cation. The compatibility of electrolyte for reversible dissolution/deposition of Mg2+ is the most important factor to determine Coulomb

    researchmap

  • Free energy analysis of electron and proton transfer reactions in solution via first-principles MD

    館山 佳尚

    物性研究所客員所員講演会  2006.4 

     More details

    Language:Japanese  

    第一原理分子動力学法を用いた電子移動及びプロトン移動反応に関する自由エネルギー計算についての私の最近の取り組みを報告する。

    researchmap

  • DFT-MD Analysis of Interfacial Charge Transfer at TiO2/ Solution Interfaces for Photocatalysis and Solar Cell

    TATEYAMA, Yoshitaka, SUMITA, Masato, SODEYAMA, Keitaro

    Spring meeting of international society of electrochemistry  2012.5 

     More details

    Language:English  

    we explore possible interfacial structures and electronic states of TiO2/liquid water interfaces for PC and TiO2/liquid acetonitrile for DSC under thermal equilibrium, by using density functional theory based molecular dynamics (DFTMD) analysis. With the averaged electronic states and the view of semiconductor junctions involving electric double and space-charge layers, we discuss possible pathways of the charge transfer processes.

    researchmap

  • 炭素ダイヤモンド電極触媒界面の触媒反応に関する第一原理計算解析

    濱田 幾太郎, 館山 佳尚

    第4回「京」を中核とするHPCIシステム利用研究課題 成果報告会  2017.11 

     More details

    Language:Japanese  

    We have investigated CO2 reduction mechanism at typical BDD(111) interfaces with different types of terminations, namely, H-, OH-, and (H,OH)-mixed terminations, by using first-principles density functional theory calculations. We found that neither H- nor OH-terminated surface is active for CO2 reduction. The surfaces with (OH,H)-mixed terminations, however, are found active for CO2 reduction towards HCOOH, where the isolated -OH termination decreases the energy of HCOO*. Moreover, involvement of the dimer &#8211;OH termination in the reaction opens a different pathway towards formation of HCHO.

    researchmap

  • Free energy analysis of electron and proton transfer reactions in solution via first-principles MD

    館山 佳尚

    東京大学物性研究所 理論セミナー  2006.5 

     More details

    Language:Japanese  

    溶液中の電子・プロトン移動反応すなわち酸化還元反応は多くの興味深い現象ー燃料電池、電気分解、腐食、触媒、光合成ーの重要な素過程となっている。これらの反応の基本的な物理量は原理的にGibbs/Helmholtz自由エネルギーで記述される。従って電子数が一定で、内部(全)エネルギーを中心とする従来の第一原理計算では原則取扱いが困難となっている。そこで我々は酸化還元反応の記述に向けた新しい第一原理自由エネルギー計算手法の開発・実証に取り組んできた。本講演ではそれらの手法論及び水溶液中の遷移金属錯体系を用いた精度検証について報告する。

    researchmap

  • DFT approaches to semiconductor/oxide-solution interfaces

    TATEYAMA, Yoshitaka

    MASP2012  2012.6 

     More details

    Language:English  

    半導体・酸化物電極/溶液界面に対する第一原理MDシミュレーション解析の最新研究について講義する。

    researchmap

  • ポストリチウムイオン電池開発に向けた電解質界面被膜の物性解明と材料設計

    館山 佳尚

    第4回「京」を中核とするHPCIシステム利用研究課題 成果報告会  2017.11 

     More details

    Language:Japanese  

    The multivalent ions and electrolytes interaction affect ion transport kinetics and deposition/dissolution processes.The THFs in the solvation shell of Mg2+ shows the attractive interactions which causes the frequencies of C-O to be Red shifted as compared to the bulk THFs.

    researchmap

  • Photoexcitation induced electron-ion dynamics by real-time propagation TDDFT

    TATEYAMA, Yoshitaka, OYAMA, Norihisa, OHNO, Takahisa, MIYAMOTO Yoshiyuki

    CECAM workshop: New developments for first principles ...  2006.5 

     More details

    Language:English  

    Using a formalism based on the real-time propagation time-dependent density functional theory (RTP-TDDFT), we have invesitgated the mechanisms of the photoinduced structural transformations of molecular systems on the femtosecond scale. We have shown for the first time that our method well reproduces the vibration frequencies in the excited state. This indicates the adequate accuracy of our method with respect to the shape of the excited-state PES.

    researchmap

  • 患者自身が与える機械的刺激で薬物放出を制御するインプラントゲルの開発

    川上 亘作, 井澤 浩則, 隅田 真人, 館山 佳尚, ヒル ジョナサン, 有賀 克彦

    第28回日本DDS学会  2012.7 

     More details

    Language:Japanese  

    押したり引っ張ったりという単純な機械力で分子レベルの相互作用を制御する研究が注目されており、この原理を利用すれば、患者自身の物理的な力で、薬物放出を制御する担体が開発できるかもしれない。我々は第一原理分子動力学シミュレーションより、シクロデキストリン(CyD)が圧力変化で僅かに変形することを見出した。これは、機械刺激によってCyDと薬物の相互作用が制御できる可能性を示している。そこでアルギン酸カルシウムネットワークに&#61538;-CyDを含むゲルを合成し、CyD部位に制吐剤のオンダンセトロンを包摂させ、リン酸緩衝液中で指圧を想定した加圧を行ったところ、加圧に応じた継続的な薬物放出が観察された。以上の検討より、指圧のような単純な機械力で薬物放出を制御できるインプラントゲルが創製できる可能性が示唆された。

    researchmap

  • 第一原理計算を用いたリチウムイオン電池正極/固体電解質界面の研究

    木野 日織, 館山 佳尚

    第4回「京」を中核とするHPCIシステム利用研究課題 成果報告会  2017.11 

     More details

    Language:Japanese  

    All-solid-state Li-ion batteries (ASS-LIBs) are one of the promising next-generation batteries because of their large energy density and high stability. However, when the sulfide electrolytes are used for ASS-LIBs, huge resistance is observed at oxide cathode/sulfide electrolyte interface. Buffer layer coating considerably decreases the interfacial resistance.1,2 We have explored the origin of these behaviours by first-principles calculations with some techniques.

    researchmap

  • Water Contamination Effect on Liquid Acetonitrile / TiO2 Anatase (101) Interface for Durable Dye-sensitized Solar Cell

    SUMITA, Masato, SODEYAMA, Keitaro, HAN, Liyuan, TATEYAMA, Yoshitaka

    MANA International Symposium 2012  2012.2 

     More details

    Language:English  

    We report structural and electronic properties of liquid acetonitrile (MeCN) / TiO2 anatase (101) interfaces involving a water molecule in order to analyze effect of ubiquitous water contamination in the typical electrolyte solution on the durability of dye-sensitized solar cell (DSSC), by using density-functional molecular dynamics simulations at room temperature.

    researchmap

  • DFT-D3 implementation in CPMD program for investigation of organic electrolyte solution

    IIZUKA, Shota, TATEYAMA, Yoshitaka

    Car-Parrinello Molecular Dynamics in 2017  2017.10 

     More details

    Language:English  

    Energy and environmental systems such as batteries and solar cells often use non-aqueous organic liquid in their electrolyte solutions. In doing atomistic simulations of such organic systems, van der Waals (vdW) interaction plays a crucial role. At the moment, the open CPMD program includes an option of DFT-D2 framework only. For possible increase of the vdW interaction accuracy as well as a variety of choices, we implemented DFT-D3 framework, seemingly more accurate than the DFT-D2, in the CPMD program and carried out the benchmark with the optimized/equilibrium structures of graphite, Ar dimer, liquid water and liquid ethylene carbonate (EC), a typical battery electrolyte.We then confirmed that PBE-D2 and PBE-D3 improve the structures of graphite and Ar dimer. In particular, the PBE-D3

    researchmap

  • 第一原理オーダーN手法の開発とナノ物質への応用

    大野 隆央, 宮崎 剛, 木野 日織, 西野 正理, 奈良 純, 館山 佳尚, 尾崎 泰助

    科研費特定領域研究「量子デザイン手法の開発」第1回研究報告会  2006.3 

     More details

    Language:Japanese  

    科研費特定領域研究「次世代量子シミュレータ・量子デザイン手法の開発と応用」のA02班、大野班の平成17年度の研究成果を紹介する。特に、Ge/Si(001)系に対するオーダーN法第一原理計算の結果と現状を説明する。

    researchmap

  • 酸化還元反応・固液界面のDFT-MD理論解析

    館山 佳尚

    東京大学応用化学談話会  2012.3 

     More details

    Language:Japanese  

    我々が最近取り組んでいるTiO2/H2O界面系の酸化還元反応のDFT-MD理論解析について説明する。

    researchmap

  • Molecular dynamics simulation of water dynamics at the water/solidinterface of ceria-supported Pt clusters

    SZABOVA, Lucie, Matteo Farnesi Camellone, Fabio Negreiros Ribeiro, TATEYAMA, Yoshitaka, Stefano Fabris

    Car-Parrinello Molecular Dynamics in 2017  2017.10 

     More details

    Language:English  

    The present work is a theoretical analysis based on density functional theory (DFT) and ab initio molecular dynamics (AIMD) simulations investigating the physical and chemical properties of H2O/Pt6/CeO2 material.Water-ceria interface exhibits increased H2O dissociation and surface hydroxylation until equilibrium concentration of surface OH groups is reached. The hydroxylated surface allows for fast proton diffusion along the water-ceria interface similar to the Grotthus mechanism. This effectively promotes a transfer of OH molecules towards adsorbed Pt nanoparticle, resulting in adsorption structures different from those in gas phase. We show that presence of water solvent induces charge reorganization at Pt-ceria material unlocking new stable active centers available for water adsorption

    researchmap

  • 実時間発展TDDFTを用いた分子の光励起状態の電子ー核ダイナミクス

    館山 佳尚, 小山 紀久, 大野 隆央, 宮本良之

    日本物理学会第61回年次大会  2006.3 

     More details

    Language:Japanese  

    時間依存密度汎関数理論(TDDFT)を時間ドメインで取扱う実時間発展(RTP)-TDDFTは、光励起状態の電子ー核ダイナミクスの解析への応用が期待されているが、その中で用いられている様々な近似の妥当性については不明な点が数多く残っている。我々は光励起状態での分子振動数や励起緩和時間の解析を行うことにより、RTP-TDDFTを基にした我々のスキームが定量的解析に適用可能であることを実証した。

    researchmap

  • 色素増感太陽電池における固液界面に吸着した遷移金属錯体色素の光吸収スペクトル解析

    館山 佳尚, 隅田 真人, 袖山 慶太郎

    ナノライフ公開シンポジウム  2012.3 

     More details

    Language:Japanese  

    我々はTiO2/色素/電解質溶液系への展開を念頭に、高変換効率をもたらすRuピリジル色素に着目し、そのTiO2アナターゼ(101)表面への吸着状態に関する理論解析に取り組んだ。

    researchmap

  • NO + CO Reaction on Rh Surface: DFT Investigation Combined with Microkinetic Analysis

    ISHIKAWA, Atsushi, SODEYAMA, Keitaro, TATEYAMA, Yoshitaka

    Car-Parrinello Molecular Dynamics in 2017  2017.10 

     More details

    Language:English  

    This study investigates the NO + CO reaction on Rh surface, which is widely used to model the NOx reduction by three-way catalyst in gasoline-fueled automobiles. The catalytic cycle of this reaction consists of the following elementary steps: NO dissociation, N2O formation, N2 formation and CO2 formation. In this study, all these reactions were considered with the plane-wave density functional theory (DFT). Calculated adsorption, reaction, and activation energies were employed for the microkinetic analysis. N2O and N2 were found to be mainly formed at low and high temperatures, respectively, as known from previous experiments. This study shows that microkinetic analysis should be performed fully understand the temperature dependent catalytic reactivity.

    researchmap

  • PHOTOEXCITATION INDUCED ELECTRON-ION DYNAMICS BY REAL-TIME PROPAGATION TDDFT (RTP-TDDFT)

    TATEYAMA, Yoshitaka, OYAMA, Norihisa, OHNO, Takahisa, MIYAMOTO Yoshiyuki

    CSW2006  2006.4 

     More details

    Language:English  

    With the viewpoint of evaluating the ability of this RTP-TDDFT scheme, we have examined prototypes of photoinduced structural transformations: The photoinduced ring-opening transformation in crystalline benzene and the trans-cis photoisomerisation of azobenzene molecule.

    researchmap

  • 機械的刺激を用いる新規ドラッグデリバリースステム

    井澤 浩則, 川上 亘作, 隅田 真人, 館山 佳尚, ヒル ジョナサン, 有賀 克彦

    日本化学会第92春季年会(2012)  2012.3 

     More details

    Language:Japanese  

    誰もが、いついかなる時でも発生させることができる機械的刺激を用いて薬物の放出制御ができれば、患者自身が症状に合わせて自由に薬物を摂取できる新たなインプラント型のドラッグデリバリーシステムの構築につながる。本研究では、シクロデキストリンを分子ネットワークに含むヒドロゲルを用いることで、機械的刺激による薬物の放出制御に成功した。

    researchmap

  • Solid-Liquid and Solid-Solid Interfaces in Batteries and Catalysts: Computational Explorations

    TATEYAMA, Yoshitaka

    8th International Symposium on Surface Science (ISSS-8)  2017.10 

     More details

    Language:English  

    To elucidate these issues from the theoretical and computational sides, we have developed highly-efficient DFT-based sampling (free energy calculation) code, stat-CPMD, for supercomputers such as the K computer. Then, we have addressed (1) the formation mechanisms and the structural characters of SEI films at Li-intercalated graphite anode / EC-based organic electrolyte [1-3], and (2) investigated effects of the space-charge layer as well as the reaction layer on the interface states between the cathode and the sulfide solid electrolyte in ASSBs [4,5].

    researchmap

  • Free energy computation of redox reaction in aqueous solution via density-functional based ab initio molecular dynamics

    館山 佳尚

    大規模・高精度電子状態計算手法に関する研究会  2006.7 

     More details

    Language:Japanese  

    酸化還元反応の記述に向けた新しい第一原理自由エネルギー計算手法である、グランドカノニカル第一原理分子動力学法と第一原理分子動力学+エネルギーギャップ関係式についてその手法と精度実証について報告する。

    researchmap

  • TiO2/水界面の電子・正孔状態に関する第一原理計算解析

    館山 佳尚

    ISSPワークショップ表面・界面における輸送と変換  2012.7 

     More details

    Language:Japanese  

    1: 光触媒系(主にTiO2系)に対するDFT計算アプローチの現状2: Anatase/Rutile TiO2/’bulk’ water interfaceの構造・電子状態3: Anatase TiO2/’bulk’ water interfaceの酸素還元反応4: Summary & Future

    researchmap

  • Photoexcitation induced electron-nucleus dynamics by Real-Time Propagation (RTP) TDDFT

    TATEYAMA, Yoshitaka, OYAMA, Norihisa, OHNO, Takahisa, MIYAMOTO Yoshiyuki

    Time dependent Density-Functional Theory: Prospects and Applicat  2006.8 

     More details

    Language:English  

    With the viewpoint of evaluating the ability of the real-time propagtion scheme of time-dependent density functional theory, we have examined prototypes of photoinduced structural transformations: The photoinduced ring-opening transformation in crystalline benzene and the trans-cis photoisomerisation of azobenzene molecule.

    researchmap

  • DFT simulation study on CO2 reduction to formic acid at Boron-doped diamond (BDD) surfaces

    DOU, Maofeng, IIZUKA, Shota, Einaga Yasuaki, TATEYAMA, Yoshitaka

    2017 International Workshop on Electrified Interfaces for Energy  2017.5 

     More details

    Language:English  

    We have investigated CO2 reduction mechanism at typical BDD(111) interfaces with three different types of terminations, namely, H-, OH-, and OH&H-mixed terminations, by using first-principles density functional theory calculations. We found that the hydroxyl hydrogen at surfaces with OH&H-mixed terminations involve in the reaction and act as proton source, which enhances the activity of reduction CO2 to HCOOH. In addition, production of CO is inhibited at all the surfaces, namely, (111) surfaces with H-, OH-, or OH&H-mixed terminations. These results suggest that hydrogen in the termination of BDD play a crucial role to evolve these hydro carbons instead of CO. The present mechanism will give a perspective for CO2 reduction on the semiconductor electrodes.

    researchmap

  • 時間依存密度汎関数理論によるアゾベンゼンの光異性化メカニズムの解明

    小山 紀久, 館山 佳尚, 宮本良之, 大野 隆央

    光化学討論会  2005.9 

     More details

    Language:Japanese  

    分子スイッチなどのナノデバイスにおいて最も基本的なトランスアゾベンゼンに注目し、時間依存密度汎関数理論(TD-DFT)に基づく第一原理計算によってその光異性化メカニズムを検討した。まずS1励起に関しては励起直後からN=Nボンド周りでねじれを生じ、これまでのコンセンサスとは異なる回転メカニズムに従って異性化が進行することが明らかとなった。一方、S2励起に関しては励起後も構造は平坦性を維持するものの電子状態が不安定となり、遅くとも100フェムト秒までにはS1状態へ非断熱遷移を起こし、S1状態を介してシス体へ異性化することが明らかとなった。

    researchmap

  • TiO2/H2O界面のナノ構造・吸着水・界面水素結合および電子状態

    館山 佳尚, 隅田 真人

    第31回表面科学学術講演会  2011.12 

     More details

    Language:Japanese  

    最も代表的な光触媒系であるTiO2 アナターゼ系はすでに多くの研究例・応用例があるものの、水溶液との界面における原子スケールの反応―水・有機分子分解(酸化)など―メカニズムは未だに良く分かっていない。この問題を明らかにするため、我々は第一原理分子動力学(MD)を用いた固液界面の平衡構造および平衡電子状態の解析に取り組んできた。本講演ではTiO2 アナターゼ(101)及び(001)/水界面の平衡状態下での吸着水・界面水素結合を中心に電子状態についても報告する。

    researchmap

  • 第一原理計算で界面の酸化還元・酸塩基過程を探る

    館山 佳尚

    第38回触媒学会若手会「夏の研修会」  2017.8 

     More details

    Language:Japanese  

    近年のスーパーコンピュータ・Linuxクラスターの性能の向上と、第一原理計算ソフトウェアの汎用化から、触媒材料・反応に関する第一原理計算研究が非常に一般的なものになってきた。例えば実験グループにおいても第一原理計算が数多く行われている。しかし触媒反応の微視的機構をより正しくかつ精度よく再現するには、まだまだ理論計算手法のリファインが必須であると考えられる。 本講演では触媒反応に関する第一原理計算アプローチを振り返りながら、今後より複雑な触媒反応を記述する上で必要となるであろう、理論計算手法について紹介する。また当研究室で行っている先端的アプローチについても合わせて紹介する。

    researchmap

  • Grand-canonical DFT-MD法及びDFT-MD+Marcus energy gap法による水溶液中の酸化還元反応の解析

    館山 佳尚, Michiel Sprik, 大野 隆央

    分子構造総合討論会2005  2005.9 

     More details

    Language:Japanese  

    酸化還元反応は多くの興味深い現象ー腐食、(燃料)電池、触媒、 光合成などーの重要な素過程となっている。しかし酸化還元反応の 諸物理量ー酸化還元電位などーを第一原理的に計算する手法は今ま でなかった。この問題に対し、我々は最近2つの新しい第一原理分 子動力学手法ー「grand-canonical DF-MD」及び「DF-MD + Marcus のエネルギーギャップ則」ーを開発し、その有効性を確認した。 本講演では手法論及び水溶液中の遷移金属

    researchmap

  • Equilibrium Structures and Electronic States of TiO2/Solution Interfaces for Dye-Sensitized Solar Cell and Photocatalysis: DFT-MD Sampling Analysis

    館山 佳尚

    21st Academic Symposium of MRS-Japan 2011  2011.12 

     More details

    Language:Japanese  

    Atomistic mechanisms of chemical reactions at the TiO2/liquid interfaces of dye-sensitized solar cell (DSC) and photocatalysis (PC) have not yet been fully understood due to the experimental and computational difficulty in analyzing such buried interfaces. To solve these problems, we have been exploring density functional theory based molecular dynamics (DFTMD) sampling analysis of interfacial structures and electronic states under thermal equilibrium, on the atomic and electronic scales.

    researchmap

  • DFT sampling calculation studies on interfacial phenomena in Li-ion batteries

    TATEYAMA, Yoshitaka

    IUMRS-ICAM2017  2017.8 

     More details

    Language:English  

    There remain many long-standing issues on interfacial phenomena in the secondary batteries. A representative issue is structure and characteristics of solid electrolyte interphase (SEI) formed in the anode / electrolyte interface. Recently, role of the cathode electrolyte interphase (CEI) in the cathode side has attracted much attention as well. In the field of all-solid-state battery (ASSB), the origin and the remedy of interfacial resistance, a most serious bottleneck, has been debated. Those interfacial phenomena are crucial for improving the performance and the reliability of the secondary batteries, whereas they have not been fully understood yet because of the difficulty in the in-situ measurements as well as accurate calculations.

    researchmap

  • TDDFTの実時間発展形式による光異性化のフェムト秒ダイナミクスの理論的研究

    小山 紀久, 館山 佳尚, 宮本良之, 大野 隆央, 大野隆央

    分子構造討論会  2005.9 

     More details

    Language:Japanese  

    分子スイッチなどのナノデバイスの実用化が現実性を帯びる中、フェムト秒オーダーの光化学反応を記述する理論的計算手法の開発は重要なテーマである。我々は時間依存密度汎関数理論(TD-DFT)に基づく実時間発展計算により、超高速光化学反応の電子-イオンのダイナミクスを計算する手法を開発した。我々の手法では波動関数の実時間発展を4次のSuzuki-Trotter分解を利用して計算することによって、高精度で安定した長時間シミュレーションの実現を可能にしている。この手法を長年議論になっているトランスアゾベンゼンの光異性化反応に適用し、これまでの実験結果とつじつまのあう興味深い結果が得られたので報告する。

    researchmap

  • TiO2/溶液界面の界面構造・電子状態:光触媒・色素増感太陽電池の微視的機構解明に向けて

    館山 佳尚

    物性科学WG・分子科学WG合同研究会 燃料電池 No.5  2011.12 

     More details

    Language:Japanese  

    光触媒・色素増感太陽電池の微視的機構解明に向けて、TiO2/溶液界面の界面構造・電子状態を第一原理MDにより解析した。

    researchmap

  • DFT molecular dynamics studies on battery materials - SEI film and superconcentrated electrolyte

    TATEYAMA, Yoshitaka

    6th Polish Forum Smart Energy Conversion & Storage  2017.9 

     More details

    Language:English  

    There remain many long-standing issues on interfacial phenomena in batteries. Representative is structure and characteristics of solid electrolyte interphase (SEI) formed in the anode / electrolyte interface. Recently, role of the cathode electrolyte interphase (CEI) in the cathode side has attracted much attention as well. In the field of all-solid-state battery (ASSB), the origin and the remedy of interfacial resistance, a most serious bottleneck, has been debated. Those interfacial phenomena are crucial for improving the performance and the reliability of the secondary batteries, whereas they have not been fully understood yet because of the difficulty in the in-situ measurements as well as accurate calculations.

    researchmap

  • New density-functional molecular dynamics methods for redox reaction in solution

    館山 佳尚, Michiel Sprik, 大野 隆央

    第28回溶液化学シンポジウム  2005.11 

     More details

    Language:Japanese  

    我々は電子系に対してgrand-canonical形式を適用した化学ポテンシャル一定の第一原理MD手法及びMarcus電子移動理論のエネルギーギャップ関係式への第一原理MDの適用という2つの新しいアプローチが、共に水溶液中の酸化還元反応の諸物理量を比較的良い精度で計算可能であることを示した。

    researchmap

  • 光触媒TiO2/水界面の吸着水・水素結合・化学反応性の理論計算

    館山 佳尚

    JST「ナノ界面の基盤技術の構築」領域第1回公開ワークショップ  2012.1 

     More details

    Language:Japanese  

    私は密度汎関数理論(DFT)と分子動力学(MD)サンプリングを組み合わせた固液界面系の理論的探索手法の開発・確立に従事してきました。この方向性は従来用いられてきた静的なDFT計算や経験ポテンシャルMDと一線を画すものとなっており、新規なアプローチとなっています。この固液界面解析の一環として、代表的な光触媒系でありかつ基礎的にも重要なTiO2/水界面の原子・電子スケールでの熱平衡状態解析を行いました。特に効率が高いとされるTiO2 アナターゼ系に着目し、水に浸された(101)面および(001)面の熱平衡状態下での吸着水、界面水素結合および電子状態について解析を行いました。本講演ではそれらの結果と界面化学反応に対する考察について報告します。

    researchmap

  • Termination effects on CO2 Reduction at Borondoped Diamond electrodes: Ab-initio Study

    DOU, Maofeng, IIZUKA, Shota, Yasuaki Einaga, TATEYAMA, Yoshitaka

    Car-Parrinello Molecular Dynamics in 2017  2017.10 

     More details

    Language:English  

    Boron-doped diamond (BDD) exhibits unique CO2 reduction behaviors such as major production of formic acid (HCOOH) and formaldehyde (HCHO), in contrast to the other metal surfaces where CO is often produced. To understand the microscopic origin, we have investigated the CO2 reduction mechanism at typical BDD (111) interfaces with different types of terminations, involving H-, OH-, and (H,OH)-mixed terminations, by using density functional theory (DFT) calculations. The structures of different intermediates at the interfaces of water and BDD were investigated using DFT-based molecular dynamics. The pair radial distribution functions show that the key intermediates weakly interact with BDD interfaces.

    researchmap

  • 非水溶媒/遷移金属酸化物界面の平衡構造・電子状態:第一原理MD解析

    館山 佳尚

    CMSI 元素戦略WG 「電池材料の部」 実験計算連携検討会  2011.11 

     More details

    Language:Japanese  

    非水溶媒/金属酸化物の1例である、色素増感太陽電池のTiO2/アセトニトリル界面について、第一原理MDを適用して行った定常状態解析について報告する

    researchmap

  • First-principles study on effects of buffer layer, Li depletion, and ion mixing at interfaces between LiCoO2 and sulfide electrolyte in all-solid-state battery

    TATEYAMA, Yoshitaka, Jun Haruyama, SODEYAMA, Keitaro

    21th International Conference on Solid State Ionics (SSI-21)  2017.6 

     More details

    Language:English  

    All-solid-state Lithium-ion batteries (ASS-LIBs) have been regarded as promising next-generation batteries. Recently, sulfide-based electrolytes have attracted considerable attention because of the high Li-ion conductivities comparable to those of the ordinary organic-liquid electrolytes. However, large interfacial resistance is usually observed if we combine sulfide electrolytes and oxide cathodes [1]. On the other hand, it has been also observed that the interfacial resistance is reduced dramatically by interposing an insulating buffer layer to the interfaces [1]. Compared to these observations, little is known about the atomistic aspects of the solid-solid interfaces in the ASS-LIBs. Therefore, we have investigated those properties such as potential origins of the interfacial resistance

    researchmap

  • グランドカノニカル第一原理MDとエネルギーギャップ関係式による水溶液中の酸化還元反応の考察

    館山 佳尚

    青木・常行研コロキウム  2005.5 

     More details

    Language:Japanese  

    我々はgrand canonical形式を用いた第一原理MD手法及び Marcusの電子移動理論を基に導出されるエネルギーギャップ 関係式への第一原理MDの適用という2つの新しいアプローチ から水溶液中の酸化還元反応の諸物理量を求め、各々の アプローチの有効性について検討を行った。例えば標準酸化 還元電位については比較的小さなユニットセルでも良い精度が 得られることが示された。これらの手法は電極・溶液・生体 反応への応用が大いに期待できる。

    researchmap

  • 固液界面反応に向けた第一原理計算解析:色素増感太陽電池を中心に

    館山 佳尚

    物性研短期研究会「エネルギー変換の物性科学」  2011.11 

     More details

    Language:Japanese  

    色素増感太陽電池の微視的メカニズム解明を目的に、その代表的系であるTiO2/アセトニトリル界面、TiO2-black dye吸着系について第一原理MDおよびTDDFTを用いて行った研究内容を報告する。

    researchmap

  • First-Principles study on interfaces between sulfide electrolyte and cathode in all solid-state battery

    TATEYAMA, Yoshitaka, Jun Haruyama, SODEYAMA, Keitaro

    Platform for Advanced Scientific Computing Conference (PASC17)  2017.6 

     More details

    Language:English  

    All-solid-state Li-ion batteries have been regarded as promising next-generation batteries. However, large interfacial resistance for ion transport is usually observed even if promising sulfide electrolyte is set on typical oxide cathode. These phenomena have been explained with structural disorder and space-charge layer of Li ion around the interface, though little is known about the atomistic mechanism. Then, we investigated probable heterogeneous interfaces between a sulfide electrolyte (β-Li3PS4) and an oxide cathode (LiCoO2) by DFT+U calculations with some techniques to evaluate the stable matching of incommensurate solid-solid interface and the site-dependent chemical potential of Li ion. The results indicate that the Li depletion can proceed at the beginning of the charge process,

    researchmap

  • グランドカノニカル第一原理MDとMarcusのエネルギーギャップ関係式による水溶液中の酸化還元反応の考察

    館山 佳尚

    つくば計算物質生命科学コロキウム  2005.6 

     More details

    Language:Japanese  

    我々はグランドカノニカル形式を用いた化学ポテンシャル一定の 第一原理MD手法及びMarcusの電子移動理論で導出されるエネルギー ギャップ関係式への第一原理MDの適用という2つの新しいアプローチ についてその有効性の検討を行った。テスト系としては水溶液中の イオン原子・分子に関する酸化還元反応を使用した。まず標準酸化還元電位に ついては小さなユニットセルでも比較的良い精度(~0.2 eV程度のエラー)が 得られることが示された。一方再配置エネルギーについてはサイズ効果が 大きいだろうという兆候が見つかった。またこれらの結果の解析の中で、 両アプローチの間に一定の関係があることを見いだした。講演では 両アプローチの手法論を中心にその検討過程の詳細について報告する。

    researchmap

  • Dynamics of Nanoelectrochemistry

    AONO, Masakazu, HASEGAWA, Tsuyoshi, TERABE, Kazuya, TSURUOKA, Tohru, OHNO, Takeo, HINO, Takami, NAYAK, Alpana, WU, Shouming, OKAWA, Yuji, TATEYAMA, Yoshitaka, MANDAL, Swapan Kumar, NAKAYAMA, Tomonobu, NAKAYA, Masato

    ISSS-6  2011.12 

     More details

    Language:English  

    ナノスケールでの化学反応のダイナミクスとそれを制御するテクノロジーについて解説する。

    researchmap

  • DFT molecular dynamics studies on battery materials: SEI film and superconcentrated electrolyte

    TATEYAMA, Yoshitaka

    FiMPART2017  2017.7 

     More details

    Language:English  

    We investigated the formation mechanisms and the properties of organic and inorganic solid electrolyte interphase (SEI) films, a long standing issue in the battery science, and the superconcentrated electrolytes that attract much attention recently for next-generation electrolytes, by first-principles DFT molecular dynamics (MD) simulations on supercomputers like the K computer in Japan. Regarding the SEI issue, we found a novel mechanism of the VC additive effect on the initial reductive decomposition of EC solvent and then proposed a probable subsequent mechanism with the decomposed products toward the organic SEI formation at the electrode &#8211; electrolyte interface which overturns the conventional understandings. Also, the equilibrium properties of SEI films involving inorganic LiF

    researchmap

  • Grand canonical CMD method and the energy gap formulation for redox potential: A study of anionic redox reeactions in aqueous so

    TATEYAMA, Yoshitaka

    CPMD2005  2005.9 

     More details

    Language:English  

    We compare the results of a recently developed grand canonical CPMD method for the computation of oxidation free energy (redox potential) to the energy gap formulation based on Marcus theory of electron transfer. We found that the calculated redox potentials are in good agreement between both methods in the redox reactions of anionic transition metal complexes, to which Marcus theory can be assumed to apply. Compared to the experimental values, the typical error of the grand canonical method is estimated to be around 0.2 eV in the periodic box with 30 water molecules. The size effects, in response to increasing the number of water from 30 to 48, are found to be small (~0.1 eV) in the present reactions. The link to Marcus theory also enables us to compute reorganization free energy for oxidations. These two methods may give an insight into the reorganization of the solute and solvent motions in electron transfer reactions as well.

    researchmap

  • 色素増感太陽電池電極アナターゼTiO2 (101)/アセトニトリル界面に おける水分子の影響

    隅田 真人, 袖山 慶太郎, 館山 佳尚

    第31回 表面科学 学術講演会  2011.12 

     More details

    Language:Japanese  

    アナターゼナノ粒子で最も大面積を占める(101)面/MeCN 界面に混入した水分子の影響を,第一原理密度汎関数法分子動力学計算を用いて調べた結果を発表する.

    researchmap

  • Brute-Force First-Principles Sampling Investigations of Battery Electrolytes and Interfaces

    TATEYAMA, Yoshitaka

    Materials research by Information Integration Initiative Worksho  2017.7 

     More details

    Language:English  

    We have newly implemented multiple MPI parallelization in the Car-Parrinello Molecular dynamics code, CPMD, for efficient free energy calculations, which allows to examine one reaction with only one job. Using the code on the K computer, we elucidated the novel mechanisms on solid electrolyte interphases (SEI) films formed at the electrolyte-electrode interfaces and unusual characteristics of superconcentrated electrolyte in batteries. Recently, we have used this code to carry out high-throughput first-principles calculations for machine-learning analysis as well.

    researchmap

  • Real-time propagation time-dependent density functional study on photoexcitation-induced electron-ion dynamics

    TATEYAMA, Yoshitaka

    電子相関と電子励起に関する研究会  2005.11 

     More details

    Language:English  

    Photoexcitation-induced electron-ion dynamics is investigated by means of a computational method based on real-time propagation (RTP) time-dependent density functional theory (TDDFT). The vibrational analysis in the excited states indicates that our method is adequately accurate.

    researchmap

  • 色素増感太陽電池系電極/電解質溶液界面・Ru色素吸着に関する第一原理計算解析

    館山 佳尚, 隅田 真人, 袖山 慶太郎

    第2回計算物質科学イニシアティブ(CMSI)研究会  2012.1 

     More details

    Language:Japanese  

    本研究では,アナターゼナノ粒子で最も大面積を占める(101)面/MeCN 界面に混入した水分子の影響を,第一原理密度汎関数法分子動力学計算を用いて調べた.

    researchmap

  • Oxygen Contribution to Redox Ilmenite Type 4d Transition Metal Oxide; Applications in Na ion Batteries

    ALASSADI, HusseinNaseefMohammad, TATEYAMA, Yoshitaka

    Car-Parrinello Molecular Dynamics in 2017 (CPMD2017)  2017.10 

     More details

    Language:English  

    We aimed at finding high capacity Na ion cathodes by examining allmechanisms that increase the capacity beyond that of transition metal redox.Using DFT, we screened the full range of hexagonal layered compounds withNaxTMO3 formula. We found that O

    researchmap

  • Redox reactions in aqueous solution by new ab-initio molecular dynamics methods

    館山 佳尚, J. Blumberger, M. Sprik, 大野 隆央

    東京大学物性研究所短期研究会「固体における水素の科学」  2005.11 

     More details

    Language:Japanese  

    水溶液中での水分子の解離が絡んだ遷移金属錯体の酸化還元反応に対して、我々が開発した酸化還元反応向けの新規第一原理計算手法を用いて行った解析について、手法論を交えながら報告する。

    researchmap

  • 光触媒・太陽電池系TiO2/溶液界面の第一原理MD解析

    隅田 真人, 袖山 慶太郎, 館山 佳尚

    「連携ラボ」第7回公開シンポジウム  2012.2 

     More details

    Language:Japanese  

    TiO2/液体界面の原子ベルの解析は,光触媒や太陽電池設計に重要である.本発表では,TiO2/水,TiO2/アセトニトリル界面について,第一原理計算による成果を発表した.

    researchmap

  • Grand-canonical density-functional molecular-dynamics study on redox reactions of aqueous transition-metal complexes

    TATEYAMA, Yoshitaka

    電極/溶液系の計算科学研究会  2005.11 

     More details

    Language:English  

    Thermochemistry of the redox reactions of anionic transition metal complexes in aqueous solution is studied by the grand-canonical density functional molecular dynamics method recently developed. We found that typical error in the standard redox potentials is estimated to be around 0.2 eV even in a small supercell, indicating that this theoretical approach is promising for the further application

    researchmap

  • DFT investigation of electronic states and reactivity of boron-doped diamond - water interface

    FUTERA, Zdenek, Yasuaki Einaga, TATEYAMA, Yoshitaka

    International Conference on Diamond and Carbon Materials 2013  2013.9 

     More details

    Language:English  

    In this work we have investigated the reactivity of BDD surfaces and interfaces based on their structural and electronic properties, by using DFT based computational techniques. Focusing on the (111) facet, we compare the electronic states between the BDD and un-doped diamond with different terminations (see Fig. 1 for H-terminated model). Performing calculations on these models we found that there are unoccupied surface state (SS) located in the upper part of the band gap on H-terminated surface, while on the surface covered by oxide or hydroxyl groups these states are in lower part of the gap close to valence band edge.

    researchmap

  • 第一原理オーダーN手法の開発とナノ物質への応用

    大野 隆央, 宮崎 剛, 木野 日織, 西野 正理, 奈良 純, 館山 佳尚, 大塚 教雄, 尾崎泰助

    科研費特定領域研究 「次世代量子シミュレータ・量子デザイン手法の  2007.3 

     More details

    Language:Japanese  

    科研費特定領域研究「次世代量子シミュレータ・量子デザイン手法の開発と応用」のA02班、大野班の平成18年度の研究成果を紹介する。

    researchmap

  • Redox Reaction Mechanisms at TiO2 - Water Interfaces: A DFT Molecular Dynamics Study

    TATEYAMA, Yoshitaka, Koharu Aikawa

    64th Annual Meeting of the Internat. Society of Electrochemistry  2013.9 

     More details

    Language:English  

    In this work, we focus on the TiO2 - water interfaces for typical photocatalyst models, and explore possible interfacial structures, electronic states and oxygen reduction reaction (ORR) processes, by using density functional theory based molecular dynamics (DFT-MD) simulations with explicit solvent and surface atoms.

    researchmap

  • Development of order-N DFT methods and the applications on nano materials

    大野 隆央, 宮崎 剛, 木野 日織, 西野 正理, 奈良 純, 館山 佳尚

    科研費特定領域研究「次世代量子シミュレータ〜」平成19年度顔合わせ会議  2007.6 

     More details

    Language:Japanese  

    超大規模シミュレーションにより、ナノ物質の新奇な物性・機能の量子論的な解析・予測、構造と機能の相関関係の解明、新奇な機能の設計とその実現のための構造の提案等、ナノ構造の機能探索・設計に関する量子論的アプローチを目指す研究の概要を紹介する。(1) 超大規模シミュレーション手法の開発、(2) ナノバイオ・ナノ触媒系への適用、(3) ナノ物質の構造と機能の解明、(4) ナノ物質の新機能の設計、の流れで遂行する研究計画を説明する。

    researchmap

  • DFT+U Study of Cu/CeO2 Model Catalysts

    SZABOVA, Lucie, Oleksander Stesovych, Filip Dvorak, Matteo F. Camellone, Josef Myslivecek, Vladimir Matolin, Stefano Fabris, TATEYAMA, Yoshitaka

    2013 JSAP-MRS Joint Symposium  2013.9 

     More details

    Language:English  

    Environmental protection requires search for new, more effective and cheaper catalysts for reducing the air pollution as well as producing energy by a more environment-friendly methods. The heterogeneous catalysts are often composed of metal-oxides doped by metal nanostructures [1-3]. The choice of both metal and substrate is substantial for properties of the catalyst. Reducible oxides such as ceria are known to show a particular ability to activate supported metal clusters. We investigated thermodynamic, structural and electronic properties of copper-ceria (CeO2) surfaces and interfaces.

    researchmap

  • Overestimation of excitation energy in the DFT/TDDFT calculations

    館山 佳尚, 大塚 教雄, L. Bernasconi, M. Sprik

    日本物理学会第62回年次大会  2007.9 

     More details

    Language:Japanese  

    我々は線形応答TDDFTと平面波基底の第一原理MD を組み合わせることにより、これまで困難であった溶液系の光吸収計算に取り組んだ。その精度実証として紫色を示す過酸化マンガンイオン水溶液について計算を行った所、TDDFT計算のみならず通常のDFT計算においても励起エネルギーを’過大’評価することがわかった。講演では交換・相関項依存性の吟味や量子化学計算との比較を行いながらその原因について議論する。

    researchmap

  • 第一原理分子動力学計算によるリチウムイオン二次電池電解液および添加剤のSEI形成反応解析

    後瀉 敬介, 袖山 慶太郎, 館山 佳尚, 奥野 幸洋

    2013年電気化学会季大会  2013.9 

     More details

    Language:Japanese  

    本研究では、顕に溶媒のダイナミクスを考慮した自由エネルギーに基づく平衡状態および反応自由エネルギー解析を行い、ECやVCの還元後の反応過程を明らかにし、SEI形成におけるVCの役割について知見を得ることを目的とした。

    researchmap

  • Computational electrochemistry: new first-principles method for electrochemical reactions

    館山 佳尚

    東大物性研短期研究会「物性化学のフロンティア2007」  2007.11 

     More details

    Language:Japanese  

    表面化学分野では第一原理計算による解析が非常に浸透しており、既に標準的なツールとして認知されていると言っても過言ではない。しかしそれは真空表面という限定的な環境に対するもので、実用的なマテリアル中の環境である固固界面、固液界面、溶液系に対しては現状の第一原理計算ではまだまだ不十分な点が多い。近年このようなモチベーションからより一般的な物理化学反応に対する様々な新規第一原理計算アプローチが国内外から提案されてきた。我々もその一つとして,電気化学の基本反応である酸化還元反応の定量的解析を可能にする第一原理自由エネルギー計算手法-Density Functional Constrained Molecular Dynamics Energy Gap method(DF-CMD-EG method)-の開発と実証を行った。

    researchmap

  • 第一原理分子動力学計算によるリチウムイオン二次電池電解液および添加剤のSEI形成反応解析

    奥野 幸洋, 後瀉 敬介, 袖山 慶太郎, 館山 佳尚

    第54回電池討論会  2013.10 

     More details

    Language:Japanese  

    本研究では、顕に溶媒のダイナミクスを考慮した自由エネルギーに基づく平衡状態および反応自由エネルギー解析を行い、ECやVCの還元後の反応過程を明らかにし、SEI形成におけるVCの役割について知見を得ることを目的とした。

    researchmap

▼display all

Awards

  • ”Best Use of HPC in Manufacturing” Reader’s choice

    2017.11  

    TATEYAMA Yoshitaka

     More details

  • 第7回ドイツイノベーションアワード ゴッドフリードワグネル賞2015

    2015.6   スパコンの⾼効率利⽤による リチウムイオン電池電解質界⾯反応の理論的機構解明

    館山佳尚

     More details

Research Projects

  • Science on Interfacial Ion Dynamics for Solid State Ionics Devices

    Grant number:19H05812  2019.6 - 2024.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

      More details

    Grant amount:\126100000 ( Direct Cost: \97000000 、 Indirect Cost:\29100000 )

    researchmap

  • Theoretical, Computational & Data Science Studies on Interface Ionics for Energy Storage

    Grant number:19H05815  2019.6 - 2024.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

      More details

    Grant amount:\222300000 ( Direct Cost: \171000000 、 Indirect Cost:\51300000 )

    researchmap

  • 半導体溶液界面反応向けの空間電荷層・電気二重層・電位をくりこんだ第一原理手法構築

    2015.4 - 2018.3

    日本学術振興会  科学研究費基盤研究C 

    館山 佳尚

      More details

    Authorship:Principal investigator  Grant type:Competitive

    researchmap

  • Development of advanced energy storage system based on overall strategies on new materials and new interface

    Grant number:15H05701  2015 - 2019

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Specially Promoted Research  Grant-in-Aid for Specially Promoted Research

    YAMADA Atsuo, OKUBO masashi, YAMADA yuki, NISHIMURA shin-ichi, TATEYAMA yoshitaka, HARADA yoshihisa, ASAKURA daisuke, NAKAI Hiromi, OTANI minoru, YABUUCHI naoaki

      More details

    Grant amount:\568230000 ( Direct Cost: \437100000 、 Indirect Cost:\131130000 )

    Through careful overlooking and reconsiderations of materials science for energy storage by combined experimental, spectroscopic, and computational approach, we demonstrated several effective strategies and new materials, together with battery devices including functional interfaces. Towards activation of oxygen redox in solids to achieve much larger amount of charge storage, we established molecular-orbital principles and identified two metastable intermediate, alternate spin state and oxygen-oxygen bonding, which induce voltage hysteresis upon charge-discharge. To avoid such energy loss and activate stable oxygen redox, introduction of ordered vacancy showed promising by modulated electric states and self-reordering phenomenon induced by cooperative Coulombic interaction. Also, we discovered negative permittivity of water molecules confined in nanosheets that largely (1.7 times) increase interfacial capacitance. Increasing salt concentration was revealed to modulate coordination structure, electric state, and interface, to largely improve several battery functions. Particularly, aqueous systems have realized surprisingly wide stable voltage range exceeding 4 V (1.2 V in pure water). Besides, accumulating multi-functions into single solvent molecule have established a practical strategy for industry. A prototype battery cell realized cut-off voltage of 5.2 V with stable cycling over 1000 times, corresponding to 1.3 – 2.6 times larger energy density than that of lithium-ion batteries.

    researchmap

  • Adiabatic approximation violation on electronic structure due to quantum effect of hydrogen

    Grant number:25620009  2013.4 - 2015.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research  Grant-in-Aid for Challenging Exploratory Research

    SEKIBA Daiichiro, HARADA Yoshihisa, MATSUO Motoaki, FUKUTANI Katsuyuki, ORIMO Shinichi, TATEYAMA Yoshitaka, SODEYAMA Keitaro

      More details

    Grant amount:\4160000 ( Direct Cost: \3200000 、 Indirect Cost:\960000 )

    A comparative study on the electronic structure between Mg2FeH6 and Mg2FeD6 was made by means of synchrotron radiation. The resonant excitation from Fe2p to unoccupied states, which induces inelastic X-ray scatterings, was used. We observed 2.6 eV Raman shift ascribed to the electronic Raman scatterings and also the vibronic Raman scatterings with ~ 100 meV shifts. A vibronic scattering can be attributed to the Fe-H or Fe-D symmetric stretch mode due to the clear isotope effect with the factor of root mean square of 2. The second excitation also appears on the spectra. This implies the strong electron-phonon coupling in this system. A large isotope effect is also seen on the electronic Raman shift. The origin is, however, still an open question, which requires further experiments.

    researchmap

  • Measurement of single-molecule devices connected with conductive polymer chains

    Grant number:24241047  2012.4 - 2016.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)  Grant-in-Aid for Scientific Research (A)

    OKAWA Yuji, ARIGA Katsuhiko, SAKURAI Makoto, KUBO Osamu, NAKAHARAI Shu, OGAWA Shinichi, HILL Jonathan P., TATEYAMA Yoshitaka, KOBAYASHI Nobuhiko, ISHI Hiroyuki

      More details

    Grant amount:\49010000 ( Direct Cost: \37700000 、 Indirect Cost:\11310000 )

    We have developed a novel method for fabricating single-molecule devices. In this method, a single conductive polymer chain is fabricated by a chain polymerization and connected to a single functional molecule. The purpose of this study is to develop and evaluate new methods of measuring electric transport properties of such single-molecule devices. We first examined appropriate insulating substrates for this study, and found that a hexagonal boron nitride was a good candidate. We then fabricated metal nano-electrodes on the substrate, and succeeded in creating single conductive polymer chains between the electrodes. In addition, we found selective adsorption of molecules on a molybdenum disulfide substrate, and also found the formation of arrays of gold nanoparticles on molecular layers.

    researchmap

  • 第一原理統計力学による 太陽電池・光触媒界面の動作環境下電荷移動・励起過程の解明

    2011.12 - 2015.3

    科学技術振興機構  さきがけ「エネルギー高効率利用と相界面」 

    館山 佳尚

      More details

    Authorship:Principal investigator  Grant type:Competitive

    researchmap

  • ドナー・アクセプター型界面電子移動過程のコンストレイントDFT第一原理解析

    2011.4 - 2014.3

    日本学術振興会  科学研究費補助金基盤研究B 

    館山 佳尚

      More details

    Authorship:Principal investigator  Grant type:Competitive

    researchmap

  • Studies on Structure Sampling and Non-Equilibrium Dynamics Using Ab-Initio Molecular Dynamics Methods

    Grant number:22104006  2010.4 - 2015.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    TSUNEYUKI Shinji, OTANI Minoru, YOSHIMOTO Yoshihide, YAMAUCHI Jun, NAKAYAMA Takashi, SUGINO Osamu, MORIKAWA Yoshitada, AKAGI Kazuto, TATEYAMA Yoshitaka, SUWA Yuji, GOHDA Yoshihiro

      More details

    Grant amount:\67730000 ( Direct Cost: \52100000 、 Indirect Cost:\15630000 )

    This project is mainly dedicated to first-principles study on thermal physics and non-equilibrium dynamics in condensed matter. For long-time/large-scale simulation needed for the purpose, we developed "xTAPP", a highly parallelized and multi-functional program package for first-principles molecular dynamics simulation. We also developed an efficient scheme of modeling anharmonic interaction between atoms from first principles for accurate calculation of lattice thermal conductivity. For the simulation of electrochemical reaction, we extended the effective screening medium method previously proposed by one of our members, with which simulations of electrochemical reaction under arbitrary and constant bias voltage was realized. "xTAPP" and the program package "ALAMODE" for lattice thermal conductivity were published as open source codes.

    researchmap

  • 第一原理計算を用いた酸化物ヘテロ構造の性質の研究

    Grant number:10F00756  2010 - 2012

    日本学術振興会  科学研究費助成事業 特別研究員奨励費  特別研究員奨励費

    館山 佳尚, FRONZI M., FRONZI Marco

      More details

    Grant amount:\2200000 ( Direct Cost: \2200000 )

    酸化ジルコニウム―酸化セリウム界面の空孔形成・拡散メカニズムおよびその不純物効果についての密度汎関数理論第一原理計算解析の論文をまとめ、Physical Review Bに投稿し、アクセプトされた。もうじき出版される。またジルコニア酸バリウム系の第一原理分子動力学計算によって得られた、歪みに対するプロトン移動度の非線形関係のメカニズムについても投稿準備中である。このシステムでは酸化物を圧縮されて原子間の空間が狭くなった条件の時のみプロトン伝導が上がるという一見常識とは反対の結果が得られたが、構造および電子状態の解析から酸素原子を伝って拡散するプロトン伝導経路が圧縮することにより増加することがわかった。これら両システムは固体酸化物燃料電池電解質における2つの主要なイオン伝導である、酸素イオン伝導、プロトン伝導の代表的システムにおける解析であり、両者の知見を合わせることによって固体酸化物燃料電池電解質の最適化(低温度動作化)への指針を導出することに今後も取り組んで行く予定である。

    researchmap

  • Establishment of time-dependent density functional theory approach for photo-excited electron-nuclear dynamics in condensed-matters.

    Grant number:20540384  2008 - 2010

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)

    TATEYAMA Yoshitaka, HU Chunping, SODEYAMA Keitaro, MIYAMOTO Yoshiyuki

      More details

    Grant amount:\3510000 ( Direct Cost: \2700000 、 Indirect Cost:\810000 )

    We have developed following theoretical methods and/or computational techniques for the analysis of photo-excited electron and nucleus dynamics, which is a key process of photo-excited nano, energy and environmental phenomena, on the basis of time-dependent density functional theory (TDDFT) : (1) introduction of spin polarisation for the TDDFT real-time propagation scheme, (2) development of the calculation theory of non-adiabatic coupling constant based on the TDDFT linear-response regime, (3) evaluation of TDDFT modified linear-response scheme for charge-transfer excitation, (4) introduction of electric field in the TDDFT real-time propagation scheme.

    researchmap

  • 固液界面酸化還元反応の理論的反応設計技術の構築

    2007.10 - 2011.3

    科学技術振興機構  さきがけ「界面の構造と制御」 

    館山 佳尚

      More details

    Authorship:Principal investigator  Grant type:Competitive

    researchmap

  • First principles simulation of electrochemical reaction at metal/water interface

    Grant number:19340077  2007 - 2009

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)  Grant-in-Aid for Scientific Research (B)

    OTANI Minoru, SUGINO Osamu, MORIKAWA Yoshitada, TATEYAMA Yosihisa, HAMADA Ikutaro

      More details

    Grant amount:\17420000 ( Direct Cost: \13400000 、 Indirect Cost:\4020000 )

    Based on the first-principles molecular dynamics simulations, we have elucidated many physical phenomena under applied bias potential to the electrode/electrolyte interface. Especially, we have studied electrochemical reactions on the interface, structure of electric bilayer and variation of the vibration frequency adsorbed atoms and molecules.

    researchmap

  • Development of order-N DFT methods and the application on nano materials

    Grant number:17064017  2005 - 2008

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Priority Areas  Grant-in-Aid for Scientific Research on Priority Areas

    OHNO Takahisa, MIYAZAKI Tsuyoshi, KINO Hiori, NISHINO Masamichi, NARA Jun, TATEYAMA Yoshitaka, OZAKI Taisuke

      More details

    Grant amount:\40200000 ( Direct Cost: \40200000 )

    researchmap

▼display all