Modified sulfide solid electrolyte and preparation method and battery

By doping modified sulfide solid electrolyte with zinc, oxygen and antimony elements, the problem of poor air stability of sulfide solid electrolyte is solved, the electrochemical stability and air stability are improved, and the commercialization of all-solid battery technology is promoted.

CN115207457BActive Publication Date: 2025-04-01SVOLT ENERGY TECH (WUXI) CO LTD
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Patent Information

Application Number
CN202210920390.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-08-01
Publication Date
2025-04-01
Estimated Expiration
2042-08-01

AI Technical Summary

Technical Problem

The air stability of sulfide solid electrolytes is poor, resulting in poor material performance and electrochemical stability, affecting the long-cycle performance and large-scale preparation of the battery.

Method used

By doping zinc, oxygen and antimony elements, a modified sulfide solid electrolyte is formed, and zinc and sulfur elements form Zn–S bonds, oxygen elements expand Li+ migration channels, and antimony elements enhance air stability.

Benefits of technology

The electrochemical stability and air stability of the modified sulfide solid electrolyte are improved, the energy density and rate performance of the battery are enhanced, the requirements of the preparation environment and conditions are reduced, and the commercialization of all-solid-state battery technology is promoted.

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Abstract

The present invention relates to the field of battery technology, and in particular to a modified sulfide solid electrolyte, a preparation method thereof, and a battery. The modified sulfide solid electrolyte provided by the present invention is doped with zinc, oxygen, and antimony, and the zinc, oxygen, and antimony elements are uniformly distributed in the lattice of the electrolyte material, so that the modified sulfide solid electrolyte has high ion conductivity and air stability.
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