Preparation of amorphous sulfide active materials with high capacity and their application to all-solid-state batteries

2017 Fiscal Year Final Research Report

• Project/Area Number: 26248059
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Inorganic industrial materials
• Research Institution: Osaka Prefecture University
• Principal Investigator: Tatsumisago Masahiro 大阪府立大学, 工学(系)研究科(研究院), 教授 (50137238)
• Co-Investigator(Kenkyū-buntansha): 林 晃敏 大阪府立大学, 工学(系)研究科(研究院), 教授 (10364027) ; 作田 敦 大阪府立大学, 工学(系)研究科(研究院), 助教 (30635321)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: 電極活物質 / 全固体電池 / アモルファス / 硫化物

Outline of Final Research Achievements

We focused on amorphization of sulfur-rich transition-metal sulfides for achieving high capacity and long cycle life. Amorphous TiS3 showed better charge-discharge performance than crystalline TiS3 in all-solid-state cells. Structural analyses for amorphous TiS3 revealed that the reaction mechanism during charge-discharge process was based on sulfide-anion redox with reversible structural changes. Amorphous sulfides including Mo, Fe, or V element were mechanochemically prepared and they exhibited high capacity and good cyclability.

Free Research Field

無機材料化学