Solid electrolyte, manufacturing method therefor, and all-solid-state battery comprising same
A boron-doped sulfide-based solid electrolyte with specific molar ratios and crystal structure stabilizes the electrolyte, addressing conductivity degradation and enhancing battery performance and safety in all-solid-state batteries.
WO2026135411A1PCT designated stage Publication Date: 2026-06-25POSCO HLDG INC
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- POSCO HLDG INC
- Filing Date
- 2025-11-28
- Publication Date
- 2026-06-25
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Figure KR2025095764_25062026_PF_FP_ABST
Abstract
The present invention relates to a sulfide-based solid electrolyte comprising lithium (Li), phosphorus (P), sulfur (S), oxygen (O), and a halogen element, wherein the sulfide-based solid electrolyte has an argyrodite-type crystal structure, at least a part of the crystal structure is doped with boron (B), and the sulfide-based solid electrolyte has a 11B-NMR spectrum satisfying equation 1. In B / A ≥1.0 of equation 1, A represents the peak area at 5±0.5 to 20±0.5 ppm, and B represents the peak area at -5±0.5 to 5±0.5 ppm.
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