基于相变材料改性锌粉负极及其制备方法和水系锌离子电池
By introducing copper oxalate modification into the zinc powder anode and utilizing its phase change material properties to optimize the interface structure, the problems of local current unevenness and hydrogen evolution side reaction in aqueous zinc-ion batteries are solved, improving the reversibility and cycle life of the battery, while maintaining the simplicity and compatibility of the preparation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
- Filing Date
- 2026-05-25
- Publication Date
- 2026-07-17
AI Technical Summary
Existing zinc powder anodes in aqueous zinc-ion batteries are prone to problems such as uneven local current density, uneven nucleation, dendrite growth, hydrogen evolution side reactions, and accumulation of by-products, which lead to intensified interface polarization, decreased reversibility, and shortened cycle life.
Copper oxalate was used as a phase change material to modify zinc powder anode. By introducing copper oxalate and zinc powder composite, the interface coordination environment was reconstructed by utilizing the in-situ transformation of C=O bonds and the dynamic evolution of copper valence state, thereby optimizing zinc ion adsorption and deposition behavior, inhibiting hydrogen evolution reaction and improving nucleation uniformity.
It significantly improves the nucleation uniformity of zinc powder anodes, suppresses hydrogen evolution and interfacial instability, enhances the coulombic efficiency and cycle life of half-cells, and strengthens the high-rate adaptability and high-temperature stability of full-cells. It has a wide range of raw material sources, is simple to prepare, and is compatible with existing electrode slurry coating routes.
Smart Images
Figure CN122246039B_ABST