一种氧化物固体电解质及其制备方法
The NASICON-type Li1+xScx(PO4)3 (0.5≤x≤2) solid electrolyte was prepared by stepwise calcination, wet ball milling and soft chemical ion exchange processes. This solved the problem of high-purity material preparation, achieved high ionic conductivity and good compatibility, and improved the performance of solid-state batteries.
CN121546136BActive Publication Date: 2026-07-17XIANGTAN UNIV +2
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- XIANGTAN UNIV
- Filing Date
- 2026-01-20
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing technologies make it difficult to prepare high-purity NASICON-type Li1+xScx(PO4)3 (0.5≤x≤2) solid electrolytes, resulting in decreased ionic conductivity and poor compatibility with lithium metal anodes.
Method used
Pure-phase NASICON-type Li1+xScx(PO4)3 (0.5≤x≤2) solid electrolyte was prepared by stepwise calcination, wet ball milling and soft chemical ion exchange. The purity and structural stability of the material were ensured by controlling the synthesis temperature and the number of ion exchange cycles.
Benefits of technology
The prepared solid electrolyte has high ionic conductivity, excellent electrochemical stability, and is compatible with high-energy-density lithium metal anodes, thus improving the performance of solid-state batteries.
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Figure CN121546136B_ABST
Abstract
本发明公开了一种氧化物固体电解质及其制备方法，通过分步煅烧，湿法球磨，并结合离子交换工艺制备氧化物固体电解质Li1+xScx(PO4)3(0.5<x≤2)。该固体电解质为NASICON结构的锂离子导体，且不含Anti‑NASICON杂相，其空间群为Rc。本发明制备的NASICON型Li1+xScx(PO4)3(0.5<x≤2)具有较高的离子电导率，且不含变价金属元素，与锂金属负极接触时不易发生氧化还原反应，具备优异的电化学稳定性。可作为固体电解质应用于固态电池。
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