Polyanion-doped solid-state electrolyte material, preparation method, application and all-solid-state lithium ion battery
By introducing multiple anion doping into the Zr-based halide system, a solid electrolyte of Li2a+b+3cZrCl4OaFbNc was prepared, which solved the problems of low ionic conductivity and poor interfacial stability of existing halide electrolytes and achieved high ionic conductivity, wide electrochemical window and good mechanical properties.
CN121507070BActive Publication Date: 2026-06-05HUNAN YUNENG NEW ENERGY BATTERY MATERIALS CO LTD +1
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HUNAN YUNENG NEW ENERGY BATTERY MATERIALS CO LTD
- Filing Date
- 2026-01-14
- Publication Date
- 2026-06-05
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Figure CN121507070B_ABST
Abstract
The present application discloses a multi-anion doped solid electrolyte material, a preparation method, an application and a all-solid-state lithium-ion battery, which relates to the technical field of solid electrolytes. The chemical formula of the multi-anion doped solid electrolyte material is Li 2a+b+ 3c ZrCl4O a F b N c , where 0.7 < a < 1.3, 0 < b < 0.3, 0 < c < 0.3; the amorphous phase ratio of the material is ≥ 90%, and the ionic conductivity is ≥ 2.5 mS·cm ‑ ¹, and the electrochemical stability window is 2.2 - 4.2 V. The present application introduces multi-anion (O, F, N) doping into the Zr-based halide system and uses the ball milling method to achieve sufficient mixing and structural regulation, so that the Li 2a+b+ 3c ZrCl4O a F b N c solid electrolyte material doped with multi-anions improves the ionic conductivity, broadens the electrochemical stability window and the interfacial stability.
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