• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Development of reactive force-field and molecular dynamics simulation of electrode-electrolyte interfaces

Research Project

Project/Area Number 21K04650
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 26020:Inorganic materials and properties-related
Research InstitutionNagoya Institute of Technology

Principal Investigator

Kobayashi Ryo  名古屋工業大学, 工学(系)研究科(研究院), 准教授 (70560126)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2023: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords分子動力学 / 電池材料 / 界面化学反応 / 固体イオニクス / 界面 / 固体電解質 / 反応力場 / 蓄電材料 / 電極電解質界面
Outline of Research at the Start

全固体電池の性能を左右する電極・電解質界面におけるミクロな反応機構を明らかにするため,化学反応を再現可能な原子間力場を効率的に構築する手法およびプログラムを開発する.本手法を用いてLi金属とNASICON型固体電解質の界面のシミュレーションを可能とする力場を構築し,電極・電解質界面の分子動力学シミュレーションを行い,ナノスケールの観点から界面構造変化やイオン伝導機構をより深く理解できる方法論を確立する.

Outline of Final Research Achievements

In this study, we developed a variable-charge potential to simulate the chemical reaction at the electrode-solid electrolyte interface, a key issue in the development of all-solid-state lithium-ion batteries. Specifically, we focused on two materials, Li-La-Zr-O (LLZO) and LiF. The optimization of potential parameters was performed using training data that included atomic charges, radial distribution functions, and formation enthalpies for various compositions and structures. We then verified the potential accuracy on interface structures not included in the training data. For both Li/LLZO and Li/LiF, the reproducibility of slight atomic displacements at the interface and the interface formation energy was insufficient. Although adopting machine learning potentials showed good reproducibility for defect structures in ternary systems, the construction of potentials for the electrode-electrolyte interface remains a challenge for future work.

Academic Significance and Societal Importance of the Research Achievements

原子スケールのシミュレーションは実験で観ることのできない空間・時間スケールの現象を調べるための有効なツールであるが,原子の電荷移動を伴う化学反応のような現象の大規模なシミュレーションは困難である.そのため,電荷移動を再現する原子間ポテンシャルの開発は,今後の全固体電池研究において必須であり,任意の材料の反応ポテンシャル構築が可能となれば,その応用の範囲は広く産業応用の観点でも重要である.反応ポテンシャルの精度改善の可能性とその難易度,適用限界を明らかにすることで,軽量・高速な古典ポテンシャルと低速な機械学習ポテンシャルの選択の有益な判断基準が得られ,効率的な界面シミュレーションに寄与する.

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (22 results)

All 2024 2023 2022 2021 Other

All Int'l Joint Research (2 results) Journal Article (6 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 6 results,  Open Access: 4 results) Presentation (12 results) (of which Int'l Joint Research: 1 results,  Invited: 4 results) Remarks (2 results)

  • [Int'l Joint Research] Department of Chemistry and Pharmacy/FAU(ドイツ)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Clemson University(米国)

    • Related Report
      2022 Research-status Report
  • [Journal Article] Influence of nano-crystallization on Li-ion conductivity in glass Li$$_3$$PS$$_4$$: a molecular dynamics study2024

    • Author(s)
      Kobayashi Ryo、Takemoto Seiji、Ito Ryuichiro
    • Journal Title

      Journal of Solid State Electrochemistry

      Volume: 0 Issue: 12 Pages: 1-1

    • DOI

      10.1007/s10008-024-05892-9

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Asymmetric Domain Nucleation from Dislocation Core in Barium Titanate: Molecular Dynamics Simulation Using Machine‐Learning Potential through Active Learning2023

    • Author(s)
      Deguchi Genki、Kobayashi Ryo、Azuma Hikaru、Ogata Shuji、Uranagase Masayuki、Spreafico Samuele
    • Journal Title

      physica status solidi (RRL) ? Rapid Research Letters

      Volume: 0 Issue: 9 Pages: 1-1

    • DOI

      10.1002/pssr.202300292

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Na superionic conductor-type LiZr<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> as a promising solid electrolyte for use in all-solid-state Li metal batteries2022

    • Author(s)
      Nakayama Masanobu、Nakano Koki、Harada Maho、Tanibata Naoto、Takeda Hayami、Noda Yusuke、Kobayashi Ryo、Karasuyama Masayuki、Takeuchi Ichiro、Kotobuki Masashi
    • Journal Title

      Chemical Communications

      Volume: 58 Issue: 67 Pages: 9328-9340

    • DOI

      10.1039/d2cc01526a

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Non-equilibrium molecular dynamics study on atomistic origin of grain boundary resistivity in NASICON-type Li-ion conductor2022

    • Author(s)
      Ryo Kobayashi, Koki Nakano, Masanobu Nakayama
    • Journal Title

      Acta Mater

      Volume: 226 Pages: 117596-117596

    • DOI

      10.1016/j.actamat.2021.117596

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Molecular Dynamics Simulation of Li-Ion Conduction at Grain Boundaries in NASICON-Type LiZr2(PO4)3 Solid Electrolytes2021

    • Author(s)
      Koki Nakano, Naoto Tanibata, Hayami Takeda, Ryo Kobayashi*, Masanobu Nakayama*, Naoki Watanabe
    • Journal Title

      J. Phys. Chem. C

      Volume: 43 Issue: 43 Pages: 23604-23612

    • DOI

      10.1021/acs.jpcc.1c07314

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 固体電解質材料のハイスループット原子間力場構築2021

    • Author(s)
      小林亮,中野高毅,中山将伸
    • Journal Title

      日本セラミックス協会誌「セラミックス」

      Volume: 56 Pages: 669-673

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] 分極ドメイン壁と転位の相互作用のための機械学習ポテンシャル2024

    • Author(s)
      出口元貴, 小林亮, 吾妻真光, 浦長瀬正幸, 尾形修司
    • Organizer
      日本物理学会2023年春季大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Li/LiF 界面における電荷可変型ポテンシャルの開発2023

    • Author(s)
      山田健人,小林亮
    • Organizer
      第37回分子シミュレーション討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 分子動力学法を用いた非一様固体内のイオン伝導解析2023

    • Author(s)
      小林亮
    • Organizer
      第2回計算イオニクス研究会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 分子動力学法を用いた非一様固体内のイオン伝導解析2023

    • Author(s)
      小林亮
    • Organizer
      物性研究所スパコン共同利用・CCMS合同研究会「計算の時代における物性科学」
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] ボルン有効電荷を再現する Graph NN 型 ポテンシャルの開発2023

    • Author(s)
      出口元貴, 小林亮, 尾形修司, 浦長瀬正幸, 都築貴寛, 吾妻真光
    • Organizer
      第37回分子シミュレーション討論会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 酸化物固体材料のハイスループット力場構築と分子動力学シミュレーション&#12316;深層地震機構解明へ向けて&#12316;2022

    • Author(s)
      小林亮
    • Organizer
      日本地球惑星科学連合2022年大会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] リチウムイオン電池電極・電解質界面シミュレーションのための反応力場2022

    • Author(s)
      小林亮
    • Organizer
      日本物理学会 2022年秋季大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 電極・電解質界面の反応力場開発と分子動力学シミュレーション2022

    • Author(s)
      小林亮
    • Organizer
      2022年電気化学秋季大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 酸化物固体電解質粒界におけるイオン伝導抵抗機構:分子動力学解析2022

    • Author(s)
      小林亮,石田健人,中野高毅,中山将伸
    • Organizer
      日本物理学会第77回年次大会
    • Related Report
      2021 Research-status Report
  • [Presentation] MD study on atomistic origin of grain boundary resistivity in solid electrolytes2022

    • Author(s)
      Ryo KOBAYASHI
    • Organizer
      Interface IONICS international online symposium 2022
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 分子動力学シミュレーションによる固体電解質粒界における局所イオン流解析2021

    • Author(s)
      小林亮,中野高毅,中山将伸
    • Organizer
      第62回電池討論会
    • Related Report
      2021 Research-status Report
  • [Presentation] Molecular dynamics analysis on Li-ion flux at grain boundaries in a solid-state electrolyte2021

    • Author(s)
      Ryo KOBAYASHI,Koki NAKANO, Masanobu NAKAYAMA
    • Organizer
      日本MRS
    • Related Report
      2021 Research-status Report
  • [Remarks] Nagoya atomistic-simulation package (nap)

    • URL

      https://github.com/ryokbys/nap

    • Related Report
      2022 Research-status Report 2021 Research-status Report
  • [Remarks] Parameter optimization program (optzer)

    • URL

      https://github.com/ryokbys/optzer

    • Related Report
      2022 Research-status Report

URL: 

Published: 2021-04-28   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi