Confinement type zinc-carbon composite negative electrode material, preparation method thereof, zinc ion battery negative electrode and zinc ion battery

The confined zinc-carbon composite anode material prepared by polystyrene soft template and one-step heat treatment process solves the problems of dendrite growth and side reactions in zinc anodes, and achieves high efficiency, stability and safety of zinc-ion batteries, making it suitable for mass production.

CN122136302APending Publication Date: 2026-06-02ANHUI TANSHI TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ANHUI TANSHI TECH CO LTD
Filing Date
2026-03-17
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

In existing technologies, the dendrite growth and side reaction problems of zinc anodes have not been fundamentally solved. Traditional hard template methods are cumbersome and environmentally unfriendly. The deposition of zinc on three-dimensional porous conductive hosts is uncontrollable and has poor confinement effect.

Method used

A confined zinc-carbon composite anode material with zinc-loving metal particles loaded on the inner surface of a sealed cavity was prepared by using a polystyrene soft template combined with a one-step stepped heat treatment process. Zinc ions were nucleated and grown inside the cavity by electrodeposition, eliminating the need for chemical etching and achieving the synergistic effect of physical spatial confinement and internal zinc-loving guidance.

Benefits of technology

It significantly improves the cycle stability and safety of zinc anodes, simplifies the preparation process, avoids waste liquid pollution, ensures the stability of zinc-loving guiding sites, and confines zinc deposition inside the cavity to prevent dendrite formation.

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Abstract

This invention provides a confined zinc-carbon composite anode material and its preparation method, a zinc-ion battery anode, and a zinc-ion battery, relating to the field of anode material technology. The structural unit of this anode material includes a sealed cavity, zinc-affinity metal particles loaded on the inner surface of the sealed cavity, and metallic zinc filling the interior of the sealed cavity; the metallic zinc is in direct contact with the zinc-affinity metal particles and confined within the sealed cavity. This invention uses a pyrolytic soft template instead of a traditional chemically etched hard template, achieving simultaneous template removal, resin carbonization, and CVD carbon layer coating through a one-step stepped heat treatment. Combining the synergistic effect of physical spatial confinement and internal zinc-affinity guidance, zinc deposition is constrained within the cavity, effectively preventing dendrite formation on the outer surface of the electrode, significantly improving the cycle stability and safety of the zinc anode, while simplifying the preparation process and avoiding etching wastewater pollution.
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