Sulfide-based solid electrolyte

By partially replacing P with Ge in the Li10Ge1P2S12 composition and combining it with Sb to replace part of P, the LiaGe1+bSbcP2-b-cS12 composition is formed, which solves the problems of reduced ionic conductivity and insufficient water resistance in the prior art and achieves a balance between high ionic conductivity and water resistance.

CN116632327BActive Publication Date: 2026-06-19TOYOTA JIDOSHA KK
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TOYOTA JIDOSHA KK
Filing Date
2022-12-05
Publication Date
2026-06-19

AI Technical Summary

⚠Technical Problem

In the existing Li10Ge1P2S12 composition, the ionic conductivity decreases sharply after P is replaced by Sb, and the amount of P replacing Sb is limited, resulting in insufficient water resistance.

⚗Method used

By partially replacing P with Ge in the Li10Ge1P2S12 composition and combining it with Sb to replace part of P, the LPGS structure is maintained, forming the composition LiaGe1+bSbcP2-b-cS12, where 10≤a≤10.65, 0.35≤b≤0.65, and 0.075≤c≤0.15, achieving high ionic conductivity and water resistance.

🎯Benefits of technology

While maintaining high ionic conductivity, it significantly improves the water resistance of sulfide-based solid electrolytes, achieving a balance between high ionic conductivity and high water resistance.

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Abstract

This invention relates to sulfide-based solid electrolytes. Sulfide-based solid electrolytes are composed of Li... a Ge 1+b Sb c P 2‑b‑c S 12 The sulfide-based solid electrolytes are represented by the following values: 10 ≤ a ≤ 10.65, 0.35 ≤ b ≤ 0.65, and 0.075 ≤ c ≤ 0.15.
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