Composite solid electrolyte, preparation method thereof, and all-solid-state battery comprising composite solid electrolyte
By forming a composite solid electrolyte with a polymer coating on the sulfide-based solid electrolyte particles, the problem of high reactivity of the sulfide-based solid electrolyte to moisture is solved, the atmospheric stability and chemical resistance are significantly improved, the generation of harmful gases is reduced, and the safety and performance of the battery are ensured.
Patent Information
- Application Number
- CN202380060095.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2022-08-30
- Filing Date
- 2023-08-24
- Publication Date
- 2025-03-18
AI Technical Summary
The sulfide-based solid electrolyte is highly reactive to moisture, which leads to reaction with moisture in the air and moisture under low humidity conditions, producing harmful gas hydrogen sulfide, affecting safety and performance.
Using a composite solid electrolyte containing a polymer coating on sulfide-based solid electrolyte particles, the polymer coating contains repeating units represented by chemical formula I, and the coating is formed by heat treatment to improve atmospheric stability and chemical resistance.
It significantly improves the atmospheric stability and chemical resistance of the composite solid electrolyte, reduces the amount of hydrogen sulfide produced, ensures the safety of the process and improves the performance of the battery.