Separation of ionic and electronic conductivity using all-solid-state thin-film battery techniques

2014 Fiscal Year Final Research Report

• Project/Area Number: 24550206
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Functional materials/Devices
• Research Institution: Tohoku University
• Principal Investigator: KUWATA Naoaki 東北大学, 多元物質科学研究所, 助教 (00396459)
• Co-Investigator(Renkei-kenkyūsha): KAWAMURA Junichi 東北大学, 多元物質科学研究所, 教授 (50142683)
• Research Collaborator: KOBAYASHI Tetsuro 株式会社 豊田中央研究所, 環境・エネルギー2 部 固体イオニクス研究室, 室長
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 混合伝導体 / リチウムイオン電池 / イオン伝導度 / 拡散係数 / 全固体電池 / 電子ブロッキング電極 / ノンストイキオメトリ / パルスレーザー堆積法

Outline of Final Research Achievements

We have developed electron-blocking electrodes using thin-film battery techniques to investigate ionic conductivity of thin-film cathode materials. The ionic conductivity of the cathode materials are essential factor which limits the performance of solid-state batteries. The electron-blocking electrodes were prepared from solid electrolytes and lithium thin films. The ionic and electronic conductivity of a thin-film lithium cobalt oxide were investigated. In addition, lithium deficient Li1-xCoO2 was prepared by chemical lithium extraction and the ionic and electronic conductivity was investigated by the same techniques.

Free Research Field

固体イオニクス