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

Investigation of the mechanism of Li plating in solid electrolyte for all solid state lithium ion batteries

Research Project

Project/Area Number 19K15667
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 36020:Energy-related chemistry
Research InstitutionTohoku University

Principal Investigator

Yuta Kimura  東北大学, 多元物質科学研究所, 助教 (60774081)

Project Period (FY) 2019-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywords電池材料の可視化 / 固体電解質 / 空間分布 / X線CT / 固体Liイオン伝導体 / リチウム析出 / 全固体リチウムイオン電池 / リチウム析出現象 / 界面制御
Outline of Research at the Start

電解質に固体電解質を用いた二次電池である全固体リチウムイオン電池においても、負極にリチウム金属を用いると、通電時に粒界にリチウムが析出し、正極に達して短絡が生じる。これは、全固体リチウムイオン電池の実現・普及を目指す上で致命的な問題である。しかしながら、その発生メカニズムは「いつどのような条件で、リチウム析出が生じるのか?」といった具体的な予測を行えるほどには理解されていない。本研究では、微細加工技術を用いて解析が容易な表面形状を固体電解質に導入し、発生したリチウム析出をアコースティックエミッションを用いて局所的に観測することで、現象の本質を解明することを目指す。

Outline of Final Research Achievements

All solid state lithium ion batteries (ASSLIBs) are expected to be one of the next generation energy storage devices because of their potentials to achieve higher safety, higher energy and power densities. However, Li-plating in solid electrolytes during (dis)charging hinders the practical application of ASSLIBs. Therefore, precise understanding of the mechanism of the Li-plating is needed. In this study, we aimed to understand the mechanism of the Li-plating in solid electrolytes and developed a technique that is capable of visualizing the Li-plating. The applicant successfully developed the technique that could visualize the Li-plating and accompanying microstructure changes in solid electrolytes.

Academic Significance and Societal Importance of the Research Achievements

本研究で開発した技術は、全固体電池の固体電解質におけるリチウム析出挙動を直接観察し、そのメカニズムを理解する上で、有用な手段の一つとなりうる。それに加え、本技術は、全固体電池をはじめとする様々な電気化学デバイス内の微構造および電気化学反応の分布の両方を、三次元的かつオペランドで分析することを可能とする。そのため、これらのデバイスの高性能化・長寿命化に貢献できる可能性がある。

Report

(3 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (3 results)

All 2020

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (1 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] 3D Operando Imaging and Quantification of Inhomogeneous Electrochemical Reactions in Composite Battery Electrodes2020

    • Author(s)
      Yuta Kimura, Aina Tomura, Mahunnop Fakkao, Takashi Nakamura, Nozomu Ishiguro, Oki Sekizawa, Kiyofumi Nitta, Tomoya Uruga, Toyoki Okumura, Mizuki Tada, Yoshiharu Uchimoto, Koji Amezawa
    • Journal Title

      J. Phys. Chem. Lett.

      Volume: 11 Issue: 9 Pages: 3629-3636

    • DOI

      10.1021/acs.jpclett.0c00876

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Influence of Active Material Loading on Electrochemical Reactions in Composite Solid-State Battery Electrodes Revealed by Operando 3D CT-XANES Imaging2020

    • Author(s)
      Kimura Yuta、Fakkao Mahunnop、Nakamura Takashi、Okumura Toyoki、Ishiguro Nozomu、Sekizawa Oki、Nitta Kiyofumi、Uruga Tomoya、Tada Mizuki、Uchimoto Yoshiharu、Amezawa Koji
    • Journal Title

      ACS Applied Energy Materials

      Volume: 3 Issue: 8 Pages: 7782-7793

    • DOI

      10.1021/acsaem.0c01186

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Presentation] Operando Analysis of All-Solid-State Battery Cathodes Using X-Ray Absorption Spectroscopy Measurements2020

    • Author(s)
      Y. Kimura, T. Nakamura, K. Amezawa
    • Organizer
      44th International conference and exposition on advanced ceramics and composites
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited

URL: 

Published: 2019-04-18   Modified: 2022-01-27  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi