Kinetic analysis and design of porous electrodes with single particle measurement techniques

2020 Fiscal Year Final Research Report

• Project/Area Number: 18H02075
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 36020:Energy-related chemistry
• Research Institution: Tokyo Metropolitan University
• Principal Investigator: Munakata Hirokazu 東京都立大学, 都市環境科学研究科, 助教 (00457821)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Keywords: 蓄電池 / 単粒子評価 / 応力測定 / 電極設計

Outline of Final Research Achievements

In order to realize next-generation rechargeable batteries with excellent energy and power density as well as high safety, a more precise electrode design based on kinetic parameters in addition to conventionally discussed equilibrium ones is required. In this study, we have developed a new single particle measurement system for the accurate evaluation of volume changes and resulting mechanical stress of electrode active material particles during charge and discharge processes. Those important kinetic parameters related to electrode deterioration were detected with high sensitivity and responsiveness by designing current collector probes. We have also developed a new method using micro-cavity current collectors as a more simplified one to evaluate electrode active materials.

Free Research Field

電気化学

Academic Significance and Societal Importance of the Research Achievements

電極活物質の体積変化とそれに伴う発生応力は電池の劣化を招く大きな要因である。これらの正確な評価が可能になったことで、より長寿命で安全な電池の設計が可能になる。本成果はリチウム二次電池に限らず、他の電池系の電極設計にも展開できることから、電池開発における幅広い波及効果が期待される。