Zinc dendrite-free deposition of carbon fiber negative electrode materials based on cu-zn-zif-8, batteries and methods thereof

By using Cu-Zn-ZIF-8 composite carbon fiber anode material in zinc-based flow batteries, the zinc dendrite problem was solved, improving battery efficiency and safety, extending service life, and achieving highly efficient zinc ion deposition uniformity and a wider current density range.

CN117638096BActive Publication Date: 2026-06-26ZHEJIANG UNIV
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Patent Information

Application Number
CN202311707786.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-12-13
Publication Date
2026-06-26
Estimated Expiration
2043-12-13

AI Technical Summary

Technical Problem

The formation of zinc dendrites in zinc-based flow batteries leads to polarization loss, reduced efficiency, and reduced capacity. In severe cases, it may puncture the separator, causing a short circuit and affecting service life and safety.

Method used

A zinc-free dendrite-deposited carbon fiber anode material based on Cu-Zn-ZIF-8 is used. By uniformly distributing Cu-Zn-ZIF-8 material on the surface of the carbon fiber material, a micro-nano pore structure is formed, which reduces the zinc nucleation barrier, promotes uniform zinc ion deposition, and inhibits the formation of zinc dendrites.

Benefits of technology

It significantly improves the efficiency and capacity of zinc-based flow batteries, broadens the operating current density range, avoids the problem of separator puncture caused by zinc dendrites, extends battery life and improves safety, and has a simple and low-cost manufacturing process.

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Abstract

The application discloses a kind of zinc dendrite-free deposition carbon fiber negative materials based on Cu-Zn-ZIF-8 and battery and method, belong to the field of flow battery electrode material.The application covers a layer of Cu-Zn-ZIF-8 material on the surface of carbon fiber, to realize the uniform stable deposition of zinc ion, inhibit the generation of zinc dendrite.Cu-Zn-ZIF-8 is grown on the surface of carbon fiber by hydrothermal reaction, because it has higher binding energy between Zn atom, can reduce the nucleation barrier of Zn, promote Zn deposition.The method is simple, stable performance, carbon felt prepared by the method is used as the electrode material of zinc-based flow battery negative electrode, can enhance the mass transfer rate of zinc ion on the electrode surface, can also increase the nucleation site of Zn, significantly improve the deposition uniformity of zinc ion in the reduction process, inhibit the generation of zinc dendrite, widen the current density range of battery work, improve the service life and safety of zinc-based flow battery.
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