A flexible self-supporting multifunctional interface AC@PVDF electrode material and its preparation method and application

By using PVDF or PTFE and ZIF series metal organic frame materials in supercapacitor electrode materials, the flexible self-supported multifunctional interface AC@PVDF electrode materials are prepared, and the active substances in the prior art are solved. The problems of low utilization and weak conductivity have achieved high porosity and conductivity, and improved the electrochemical performance and energy storage efficiency of supercapacitors.

CN114724862BActive Publication Date: 2024-12-31SHANGHAI NORMAL UNIVERSITY
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Patent Information

Application Number
CN202210236374.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-03-11
Publication Date
2024-12-31
Estimated Expiration
2042-03-11

AI Technical Summary

Technical Problem

Due to the addition of binders and conductive agents in the existing supercapacitor electrode materials, the utilization rate of active substances is reduced, the conductivity is weakened and the electrode is uneven, which affects the energy storage efficiency.

Method used

PVDF or PTFE and ZIF series metal organic frame materials do not need to add conductive agents and binders. Flexible self-supported multifunctional interface AC@PVDF electrode materials are prepared by grinding, drip coating and high-temperature calcining, and using ZIF series metal organic The frame material acts as a catalyst to reduce the graphitization temperature and improve conductivity.

Benefits of technology

A flexible electrode material with high porosity and good conductivity is achieved, which improves electrochemical performance and cyclic stability, enhances the specific surface area and reaction sites of the electrode, promotes electron and ion transmission, and improves the power density of the supercapacitor and Energy storage efficiency.

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Abstract

The present invention discloses a flexible self-supporting multifunctional interface AC@PVDF composite electrode material (activated carbon cloth@polyvinylidene fluoride) and its preparation method and application. The preparation method comprises mixing polyvinylidene fluoride (or polytetrafluoroethylene), ZIF zeolite imidazole metal organic framework material and N-methylpyrrolidone, and then uniformly grinding, coating and wrapping on carbon cloth, standing and drying and high-temperature calcining to obtain a multifunctional interface AC@PVDF carbon material. The multifunctional interface carbon material can be used as an electrode material to prepare a supercapacitor. Compared with the existing composite electrode materials, the flexible self-supporting multifunctional interface AC@PVDF electrode substrate material prepared by the present invention has excellent electrochemical properties and mechanical flexibility, and is an ideal material for preparing high-performance flexible supercapacitors.
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