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.
By using selected raw material compounds and a specific composition, the production of sulfide solid electrolytes suppresses nitrogen discharge, enhancing thermal stability and expanding the operating temperature range of all-solid-state batteries.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- GS YUASA CORP
- Filing Date
- 2026-04-06
- Publication Date
- 2026-07-07
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 adequately addressed.
A method involving the use of specific raw material compounds containing N, element A, and element M, selected through first-principles calculations to suppress nitrogen discharge, and a composition containing P, S, N, element A, and element M, which are reacted and heated to produce a sulfide solid electrolyte with improved thermal stability and crystalline structure.
The method effectively suppresses nitrogen discharge, enhances thermal stability, and increases the operating temperature range of all-solid-state batteries by stabilizing the high Li ion conducting phase, allowing for improved atmospheric stability and ionic conductivity.
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