A three-dimensional zincophilic current collector composite negative electrode constructed by electrochemical welding

By preparing ZnO/C fibers through electrospinning and constructing a three-dimensional zinc-loving current collector composite anode, the conductivity and ion diffusion problems of zinc-ion battery anode materials were solved, achieving uniform deposition and rapid transport of zinc ions, improving battery performance and simplifying the preparation process.

CN116404097BActive Publication Date: 2026-05-08SOUTHWEST PETROLEUM UNIV
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Patent Information

Application Number
CN202310388474.7
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-04-12
Publication Date
2026-05-08
Estimated Expiration
2043-04-12

AI Technical Summary

Technical Problem

Existing zinc-ion battery anode materials suffer from problems such as poor conductivity, high ion diffusion resistance, slow zinc ion transport speed, low electrochemical activity, small deposition area, and complex and costly preparation processes.

Method used

ZnO/C fibers were prepared using electrospinning technology, and a three-dimensional zinc-loving current collector composite anode was constructed by electrochemical welding. By utilizing the chemical stability of ZnO and the high specific surface area of ​​carbon-based materials, combined with the conductivity of Cu, uniform zinc deposition sites were formed, promoting ion transport.

Benefits of technology

It improves the electrochemical performance of zinc-ion batteries, enhances the uniform distribution and transport speed of zinc ions, increases the battery's capacity and rate performance, simplifies the manufacturing process, and reduces costs.

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Abstract

The application discloses a three-dimensional zincophilic current collector composite negative electrode constructed by an electrochemical welding method.The negative electrode structure is connected by electrochemical welding of a copper base and ZnO / C fibers prepared by electrostatic spinning through pre-electrodeposition of zinc.The application is characterized in that zincophilic ZnO / C fibers are prepared by an electrostatic spinning process combined with high-temperature carbonization, and then ZnO / C and copper foil are subjected to "electrochemical welding" by using zinc electrochemical deposition technology, so that a Zn@ZnO / C-Cu negative electrode material is obtained.The application introduces zincophilic sites ZnO and a high-conductivity copper foil into a large specific surface area carbon fiber, and designs a negative electrode structure which is beneficial to higher efficiency of a zinc ion battery.The prepared negative electrode material improves the cycle and rate performance of the zinc ion battery, and promotes further development of the negative electrode material of the zinc ion battery.
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