一种硼氢化锂-卤化铵复合固态电解质及其制备方法和应用

By combining lithium borohydride and ammonium halide and employing a two-step heat treatment process, a lithium borohydride-ammonium halide composite solid electrolyte with high ionic conductivity is generated, solving the problem of low ionic conductivity in existing lithium borohydride-based electrolytes and achieving efficient and stable operation of all-solid-state batteries.

CN122177957BActive Publication Date: 2026-07-17NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Filing Date
2026-05-12
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing lithium borohydride-based solid electrolytes have low ionic conductivity and are complex and costly to prepare, making it difficult to meet the practical application requirements of all-solid-state batteries.

Method used

A composite method of lithium borohydride and ammonium halide is adopted, and a two-step heat treatment process of inert gas and vacuum is used to generate a lithium borohydride-ammonium halide composite solid electrolyte with high ionic conductivity. The in-situ chemical reaction between ammonium halide and lithium borohydride generates products that are beneficial to improving ionic conductivity.

Benefits of technology

It significantly improves the ionic conductivity and electrochemical stability of composite solid electrolytes, reduces preparation costs, simplifies the process, facilitates large-scale production, and enables long-cycle stable operation of all-solid-state batteries.

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Abstract

本发明公开了一种硼氢化锂‑卤化铵复合固态电解质及其制备方法和应用,属于全固态电池电解质制备技术领域,本发明包括:将硼氢化锂与卤化铵混合,得到混合物料;在保护性气氛下,将所述混合物料加热至90℃~180℃进行保温处理;以及在真空条件下对经保温处理的物料继续进行热处理,得到所述硼硼氢化锂‑卤化铵复合固态电解质。本发明通过卤化铵分解诱导硼氢化锂晶相转变,并结合真空热处理有效去除气态副产物,显著提升了电解质的离子电导率和电化学稳定性,且制备工艺简单,适合大规模生产。
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