水系锌离子电池负极改性策略研究进展

Advances in anode modification strategies for aqueous zinc ion batteries

  • 摘要: 水系锌离子电池因其安全性高、离子导电率高、理论比容量高、成本低廉等优点,成为一类颇有前景的规模化储能材料。然而,锌负极在充放电过程中难以避免会出现枝晶生长和析氢腐蚀等棘手问题,严重制约了水系锌离子电池的循环寿命与实际应用的推广。本文首先分析了上述关键问题的成因和基本机制,系统阐述了目前锌负极的改性策略的4个方向,包括:负极材料构筑、涂层表面钝化、隔膜改性、电解液优化,重点论述了4类改性策略的设计要点与改性原理,并对锌负极的发展趋势进行了展望,为推动高性能水系锌离子电池发展提供参考。

     

    Abstract: Aqueous zinc ion batteries have become a promising large-scale energy storage technology because of their high safety, high ionic conductivity, high theoretical specific capacity, and low cost. However, the improvement of cycle life and the promotion of practical applications are greatly limited by dendrite growth, hydrogen evolution, and corrosion reactions in the zinc anode during the charging and discharging process in aqueous zinc-ion batteries. First analyzing the causes and basic mechanisms of these above key issues, this paper then systematically expounded on four aspects of the modification strategies of zinc anodes, including anode material construction, coating surface passivation, separator film modification, and electrolyte optimization. Moreover, this study took the design points and modification principles of the four types of modification strategies as priority and prospected the development trend of zinc anodes, providing a powerful reference for promoting the development of high-performance aqueous zinc-ion batteries.

     

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