Voltage-driven redistribution of lithium ions at solid electrolyte and electrode interfaces

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K14088
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Inorganic industrial materials
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: Hitosugi Taro 東京工業大学, 物質理工学院, 教授 (90372416)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: 固体電解質 / 電極 / 電気化学 / リチウム / 電圧印加

Outline of Final Research Achievements

All-solid-state lithium batteries are expected as next-generation batteries due to the safety, high energy density, and high power. However, the high interface resistance at the solid electrolyte and positive electrode interfaces hinder the application of all-solid-state lithium battery in the market. Therefore, it is necessary to clarify the origin of the high interface resistance and the distribution of lithium ions near the interface.
Therefore, in this study, we investigated the lithium concentration distribution near the interface using Rutherford backscattering, nuclear reaction analysis, and neutron reflectivity measurement. We succeeded in the quantitative observation of the voltage-driven redistribution of lithium ions in solid electrolytes.

Free Research Field

固体化学