水系锌电池正极表界面调控

Surface and interface regulation of cathode in aqueous zinc batteries

水系锌电池是一种安全环保的二次电池,有望作为锂离子电池的补充体系,应用于规模化储能.然而,其所用的正极材料在循环过程中存在结构崩塌和副反应等问题,严重制约了其商业化应用.由于这些问题与正极材料的表界面性质密切相关,因此通过表界面调控有望改善正极材料性能.本文从水系锌电池正极材料的反应机理出发,系统总结和分析了正极材料表界面调控的研究进展,并对未来的研究方向进行了展望,为高稳定高容量的正极材料的设计与创制提供参考.

Aqueous zinc batteries are considered as a promising candidate for large-scale energy storage systems,alternative to lithium-ion batteries,due to the high safety and environmental friendliness.However,the cathode materials suffer from issues such as structural collapse and side reactions,which seriously restrict their commercialization.Since these issues are highly relevant to the surface and interface properties of cathode materials,the surface and interface engineering therefore is expected to improve the overall performance.This review first discusses the reaction mechanisms of various cathode materials,and then systematically summarizes and analyzes the recent progress of surface and interface engineering strategies,and finally provides a perspective on future directions,aiming to provide useful guidance for the design and preparation of cathode materials with high capacity and stability.