一种硫银锗矿型固态电解质及其制备方法和应用
By preparing Mg, Ti, and F-doped LPSCl sulfide-germanium ore-type solid electrolyte, the problems of low ionic conductivity and poor stability of sulfide-germanium ore-type solid electrolytes were solved, realizing the application of all-solid-state lithium-ion batteries with high conductivity and high stability.
CN119695254BActive Publication Date: 2026-07-17DALIAN INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- DALIAN INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES
- Filing Date
- 2023-09-22
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing sulfide solid electrolytes of the silver-germanium sulfide type have low ionic conductivity at room temperature, are sensitive to water and oxygen, and have poor interfacial compatibility with lithium-ion battery cathode materials, which limits their practical application.
Method used
A Mg, Ti, and F-doped LPSCl (lithium phosphosulfur chloride) sulfosilver germanite-type solid electrolyte was prepared by planetary ball milling and solid-state sintering. The air stability and stability to metallic lithium of the electrolyte were improved by doping modification.
Benefits of technology
It improves the ionic conductivity of sulfide solid electrolytes, shortens the Li+ transport path, inhibits dendrite growth, and enhances the energy density and cycle life of the battery.
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Figure CN119695254B_ABST
Abstract
本申请公开了一种硫银锗矿型固态电解质及其制备方法和应用，属于固态电池领域。本申请主要通过对硫化物固态电解质LPSCl(锂磷硫氯化物)进行Mg、Ti、F掺杂改性，进而得到一种具有优异的湿稳定性的硫银锗矿型硫化物固态电解质，通过设计组装锂金属对称电池，表明该电解质具有优异的电化学性能。所述硫化物固态电解质的化学式为：Li5.4+5xP1‑2x(Mg‑Ti)xS4.4Cl1.6‑5xF5x，式中0<x<0.3。该硫银锗矿型固态电解质的制备方法简单有效，同时具有较好的对金属锂的循环稳定性，有望解决硫化物固态电解质作为全固态锂离子电池电解质的实际应用问题。
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