Aluminum ethoxide composite polymer electrolyte membrane, preparation method of aluminum ethoxide composite polymer electrolyte membrane, application of aluminum ethoxide composite polymer electrolyte membrane in battery and assembly process of battery

By using aluminum ethanol composite polymer electrolyte membrane in lithium metal batteries, the dual coordination mechanism of aluminum atoms and PEO polymers and the direct enhanced interface compatibility between nanowire fillers are solved, and the problems of uneven conduction of lithium ion and difficulty in controlling dendrite growth are achieved, and the efficient cycle stability and high-temperature performance of the battery are achieved.

CN119650833AActive Publication Date: 2025-03-18SUN YAT SEN UNIV
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Patent Information

Application Number
CN202411836431.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-13
Publication Date
2025-03-18
Estimated Expiration
2044-12-13

AI Technical Summary

Technical Problem

In existing lithium metal batteries, the interface compatibility of solid polymer electrolytes is poor with that of ceramic fillers, resulting in uneven conduction of lithium ions and difficulty in controlling dendrites' growth, which affects the safety and performance of the battery.

Method used

The aluminum ethanol composite polymer electrolyte membrane is used. This membrane enhances the orderly conduction of lithium ions through the dual coordination mechanism between aluminum atoms and polyethylene oxide (PEO) polymer, and directly enhances interface compatibility through the selective dealloyment method of nanowire fillers.

Benefits of technology

It realizes fast and orderly conduction of lithium ions, improves conductivity and interface compatibility, significantly inhibits the formation of dendrites, and improves the cycle stability and high-temperature performance of the battery.

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Abstract

The invention relates to the technical field of chemical batteries, in particular to an aluminum ethoxide composite polymer electrolyte membrane, a preparation method of the aluminum ethoxide composite polymer electrolyte membrane, application of the aluminum ethoxide composite polymer electrolyte membrane in a battery and an assembly process of the battery. The aluminum ethoxide composite polymer electrolyte membrane comprises a polymer and aluminum ethoxide, the structure of the polymer contains ester groups or / and ether bonds; the polymer is polyethylene oxide or a polyethylene oxide derivative; the polyethylene oxide derivative is obtained by carrying out photopolymerization on a small molecular monomer. When the aluminum ethoxide composite polymer electrolyte membrane is applied to a battery, the interfacial compatibility is enhanced, rapid and ordered transmission can be realized, and the cycling stability is good.
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