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

2020 Fiscal Year Final Research Report

• Project/Area Number: 19K15667
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 36020:Energy-related chemistry
• Research Institution: Tohoku 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
• Keywords: 電池材料の可視化

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.

Free Research Field

放射光計測

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。