Nanofiber and piezoelectric polymer composite solid electrolyte membrane, preparation method thereof, and secondary battery

By using a solid electrolyte membrane composed of nanofibers and piezoelectric polymers, the problems of uneven dissolution of zinc anode and low ionic conductivity in zinc-ion batteries have been solved, resulting in a high-performance zinc-ion battery with high capacity, excellent cycle performance, and flexibility.

CN119208766BActive Publication Date: 2026-03-10SOUTHERN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Patent Information

Application Number
CN202411115819.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-08-14
Publication Date
2026-03-10
Estimated Expiration
2044-08-14

AI Technical Summary

Technical Problem

Existing zinc-ion batteries suffer from problems such as uneven dissolution/deposition of zinc anode leading to dendrite growth, corrosion, and hydrogen evolution, and the low ionic conductivity of solid polymer electrolytes cannot meet practical requirements.

Method used

A solid electrolyte membrane composed of nanofibers and piezoelectric polymers was developed. The nanofiber membrane was prepared by electrospinning as a framework, and combined with piezoelectric polymers, zinc salts and ionic liquids to form a composite membrane with high ionic conductivity and structural stability.

Benefits of technology

It significantly improves the ionic conductivity and structural stability of zinc-ion batteries, suppresses zinc dendrite growth, enhances battery capacity, cycle performance and mechanical properties, and extends battery life.

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Abstract

The application discloses a nanofiber and piezoelectric polymer composite solid-state electrolyte membrane and a preparation method and a secondary battery thereof, relates to the technical field of batteries, and the raw materials of the solid-state electrolyte membrane include nanofibers and a piezoelectric polymer, the raw materials of the piezoelectric polymer include a piezoelectric polymer, a zinc salt and an ionic liquid; the nanofibers are used in the form of a nanofiber membrane as a framework, and the piezoelectric polymer is arranged on the nanofiber membrane. The preparation method comprises the following steps: preparing a spinning liquid by using a polymer material, performing spinning treatment, and obtaining a nanofiber membrane; dissolving the piezoelectric polymer, the zinc salt and the ionic liquid, uniformly laying the piezoelectric polymer, the zinc salt and the ionic liquid on the nanofiber membrane, and drying, and the solid-state electrolyte membrane is obtained. The secondary battery comprises the solid-state electrolyte membrane. The nanofiber reinforced solid-state electrolyte membrane realizes uniform distribution of current and electric field, provides ideal conditions for zinc deposition, the piezoelectric polymer is injected as an ion transmission medium, the zinc salt and the ionic liquid are introduced, and the ionic conductivity is improved.
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