Process for preparing particles of sulfide solid material comprising li, p, s and x elements
A high-purity Li2S-based process for manufacturing sulfide solid electrolytes addresses phase purity and particle size issues, ensuring enhanced ionic conductivity and stable particle distribution.
WO2025262066A1 Publication Date: 2025-12-26SPECIALTY OPERATIONS FRANCE
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Patent Information
- Application Number
- PCT/EP2025/066948
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-06-19
- Filing Date
- 2025-06-17
- Publication Date
- 2025-12-26
AI Technical Summary
Technical Problem
Existing methods for manufacturing sulfide solid electrolytes (SSE) face challenges in achieving high phase purity, small particle size, and maintaining ionic conductivity, often requiring post-milling or post-grinding which deteriorates surface properties.
Method used
A process involving high-purity lithium sulfide (Li2S) with controlled residual LiOH content, mixed with P2S5 and LiX, followed by heating under inert conditions to form sulfide solid material particles, and optionally pressing into pellets, achieving desired particle size distribution.
Benefits of technology
The process produces sulfide solid material with enhanced phase purity and ionic conductivity, maintaining particle size distribution and preventing conductivity loss.
✦ Generated by Eureka AI based on patent content.
Abstract
The present disclosure relates to a process for preparing particles of a sulfide solid material (M) comprising at least Li, P, S and X elements, comprising the step of providing a powder of lithium sulfide (Li2S) comprising less than 0.2 wt % of residual LiOH as measured by solid state proton NMR and having a solid state proton NMR spectrum showing a peak signal at -2.0 ± 0.2 ppm that corresponds to less than 0.005 wt % of equivalent LiOH. It also relates to particles obtained by said process and their use for the preparation of an electrode, of an electrolyte layer of an electrode or of a separator.
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