Preparation method of positive electrode substrate modified material and zinc-manganese battery

By generating nano-chromium oxide or nano-chromium nitride on carbon cloth to form a three-dimensional conductive network, the problems of insufficient conductivity and ion diffusion in zinc-manganese batteries are solved, and the high-efficiency cycle performance and high-current charge-discharge capability of zinc-manganese batteries are achieved.

CN121748341APending Publication Date: 2026-03-27BEIJING UNIV OF CHEM TECH
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Patent Information

Application Number
CN202511974919.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-25
Publication Date
2026-03-27

AI Technical Summary

Technical Problem

In zinc-manganese batteries, the manganese oxide deposited on pure carbon cloth has poor electronic conductivity and insufficient ion diffusion pathways, resulting in poor rate performance of the battery.

Method used

By immersing carbon cloth in a chromium salt solution and then heating it in an air or ammonia atmosphere using Joule heating technology, nano-chromium oxide or nano-chromium nitride is generated, forming a three-dimensional conductive network, which improves the conductivity of the carbon cloth and increases the number of active sites.

Benefits of technology

It significantly improves the conductivity and active sites of carbon cloth, enhances the cycle performance and rate performance of zinc-manganese batteries, and significantly improves cycle stability and high-current charge-discharge capability.

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Abstract

The invention provides a preparation method of a positive electrode substrate modified material and a zinc-manganese battery, and belongs to the field of battery materials. The invention provides a preparation method of a positive electrode material, which comprises the following steps: dipping carbon cloth in a chromium salt solution, and drying to obtain chromium salt-loaded carbon cloth; and heating the carbon cloth loaded with the chromium salt by using a Joule heat technology, and generating chromium oxide from the chromium salt to obtain the positive electrode material. According to the prepared positive electrode material, the conductivity and stability of the carbon cloth are improved, and the active sites of the carbon cloth are increased.
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