Solid-state electrolyte membrane, method for preparing the same, and use thereof

By mixing polymer monomers with lithium salts and inorganic additives through sand milling and in-situ polymerization on porous substrate films, the problems of uneven thermal conduction and particle agglomeration in solid-state battery preparation were solved, thereby improving the safety and electrochemical performance of lithium-ion batteries.

CN122800712APending Publication Date: 2026-09-22LIYANG TIANMU PILOT BATTERY MATERIAL TECH CO LTD
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Patent Information

Application Number
CN202510326066.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-19
Publication Date
2026-09-22

AI Technical Summary

Technical Problem

Existing solid-state battery preparation methods suffer from problems such as uneven thermal conductivity, easy decomposition of lithium battery main salt at high temperatures, high energy consumption of irradiation polymerization, and agglomeration of inorganic particles, which affect battery performance and safety.

Method used

By mixing polymer monomers, lithium salts, and inorganic additives in a sand mill, and then performing in-situ polymerization and hot rolling on a porous substrate film, a uniformly dispersed solid electrolyte membrane is formed, which constructs a rapid lithium-ion transport channel and enhances mechanical and electrochemical properties.

Benefits of technology

It improves the safety and electrochemical performance of lithium-ion batteries, inhibits lithium dendrite growth, enhances the mechanical properties and ion transport capacity of batteries, and reduces the porosity and thickness of electrolyte membranes.

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Abstract

The embodiment of the present application relates to a kind of solid electrolyte membrane and its preparation method and application, preparation method includes: polymer monomer, lithium salt and inorganic additive are mixed according to the first mass ratio, then grinded, obtain mixed solution;Into initiator stirring solution in mixed solution, obtain solid electrolyte precursor solution;Polymer monomer, lithium salt and inorganic additive are immersed into porous matrix film in the pore of porous matrix film by being immersed into solid electrolyte precursor solution, obtain the porous matrix film of being loaded with solid electrolyte membrane precursor;The porous matrix film of being loaded with solid electrolyte membrane precursor is polymerized and solidified, so that polymer monomer is polymerized under the action of initiator, to obtain solid electrolyte membrane precursor;Solid electrolyte membrane precursor is carried out heat roller pressing processing, obtain solid electrolyte membrane.
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