Zinc-air battery cathode material and integrated flexible zinc-air battery

By employing a three-electrode system of modified bamboo charcoal fiber and nickel-cobalt co-doped manganese dioxide in zinc-air batteries through electrochemical deposition, combined with electrospinning and cross-linking technologies, the problems of manganese dissolution and interfacial compatibility in the cathode of zinc-air batteries were solved, thereby improving the specific capacity, energy density and cycle performance of the batteries, making them suitable for wearable devices and flexible energy storage devices.

CN122246152APending Publication Date: 2026-06-19HUNAN INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUNAN INST OF TECH
Filing Date
2026-04-14
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing zinc-air batteries have problems with manganese dissolution and low electronic conductivity in their air cathodes. Furthermore, integrated flexible cathodes have poor compatibility at the battery assembly interface and are complex to encapsulate. Traditional zinc foil anodes are not suitable for practical applications.

Method used

Modified bamboo charcoal fiber was used as the substrate, and nickel-cobalt co-doped manganese dioxide was electrochemically deposited through a three-electrode system to form an integrated flexible cathode. A spun quasi-solid electrolyte layer was formed on the surface of the zinc-air battery cathode material. The integrated flexible zinc-air battery was prepared by combining electrospinning and cross-linking technology.

Benefits of technology

It significantly improves the specific capacity, energy density, and cycle performance of zinc-air batteries, enhances the interfacial compatibility between electrodes and electrolytes and the charge-discharge efficiency, and has good flexibility and integration, making it suitable for wearable devices and flexible energy storage devices.

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Abstract

This invention discloses a zinc-air battery cathode material and an integrated flexible zinc-air battery, belonging to the field of energy storage technology. The invention first carbonizes bamboo pulp fiber cloth to obtain modified bamboo charcoal fiber, providing a stable and high-performance substrate for subsequent loading of active materials. Then, a mixture of manganese acetate tetrahydrate, sodium diacetate, nickel acetate tetrahydrate, cobalt acetate tetrahydrate, and water is prepared and electrochemically deposited in a three-electrode system to deposit nickel-cobalt co-doped manganese dioxide onto the modified bamboo charcoal fiber, forming an integrated flexible cathode. The doping of nickel and cobalt can improve the electronic structure and stabilize the crystal structure of manganese oxide, inhibit the dissolution of manganese during charging and discharging, accelerate electron transfer during battery charging and discharging, and improve the overall efficiency of the battery. Furthermore, electrochemical deposition in a three-electrode system allows for the composite deposition with modified bamboo charcoal fiber, enhancing electrode performance.
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