Development of glass solid electrolytes for all-solid-state sodium batteries

2016 Fiscal Year Final Research Report

• Project/Area Number: 26289243
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Inorganic materials/Physical properties
• Research Institution: Osaka Prefecture University
• Principal Investigator: Hayashi Akitoshi 大阪府立大学, 工学(系)研究科(研究院), 准教授 (10364027)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 固体電解質 / 全固体電池 / ガラス / ナトリウム電池

Outline of Final Research Achievements

Na3PS4-based glass electrolytes with a partial cation (M=Si, Al, Sn) or anion (O) substitution were prepared and characterized. Cubic Na3PS4 was mainly precipitated at the compositions with a small amount of the substituent. The partial substitution of Si for P increased the conductivity of the electrolytes, while the substitution of Sn or O for P or S improved chemical stability in air. Cubic Na3PS4 was also synthesized via liquid-phase or gas-phase process. Novel oxide glass electrolytes with good formability were developed. The use of carbon conductive additives with larger specific surface doped with sulfur via a melt-diffusion process was effective in increasing capacity of all-solid-state Na/S batteries.

Free Research Field

無機材料化学