Method for producing a sulfide solid electrolyte, sulfide solid electrolyte, all-solid-state battery, and method for selecting raw material compounds used in the production of a sulfide solid electrolyte.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- GS YUASA CORP
- Filing Date
- 2026-03-06
- Publication Date
- 2026-06-02
AI Technical Summary
Existing methods for producing sulfide solid electrolytes face issues with nitrogen discharge during the production process, leading to reduced thermal stability and limited operating temperature of all-solid-state batteries, and the difference in heat treatment temperatures for high and low Li ion conducting phases is not sufficiently wide.
A method involving the use of raw material compounds containing specific elements like Li, Na, K, Al, Ta, Si, Sc, Mg, Nb, B, Hf, C, P, Zr, and Ti, along with nitrogen, to suppress nitrogen discharge and enhance thermal stability by controlling defect generation energy, resulting in a crystalline sulfide solid electrolyte with improved thermal stability and higher operating temperature.
The method effectively suppresses nitrogen discharge, enabling better control over nitrogen content and enhancing thermal stability, allowing for higher operating temperatures and improved performance of all-solid-state batteries.
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