功能高分子材料在锌负极保护中的应用

Recent Progress of Functional Polymers for Zinc Anodes Protection

水系锌离子电池因安全性高、成本低廉、环境友好等优点,在大规模储能等领域展现出广阔的应用前景。然而,锌负极与电解液界面处存在严重的枝晶生长和副反应等问题,严重制约了其实际应用。功能高分子材料具有丰富可调的功能基团、快速传导锌离子的能力、优异的柔韧性、良好的成膜与黏附性等优势,是应用于锌负极保护的一类重要材料。本文综述了功能高分子材料应用于锌负极保护的最新研究进展,并对其未来的发展进行了展望。

Aqueous zinc ion batteries deliver the merits of high safety,abundant resources,low cost and environmental friendliness,thus exhibiting broad application prospects in large-scale energy storage system.However,serious dendrite growth and side reactions occur at the Zn anode/electrolyte interphase,giving rise to the poor cycling life and Coulombic efficiency.These problems severely hinder the practical applications of zinc ion batteries.Therefore,constructing of suitable protective layers is one of the most important pathways to inhibit zinc dendrite and side reactions like hydrogen evolution,benefiting from their ability to isolate the zinc anode from the electrolyte while allowing rapid Zn^(2+) migration and facilitating uniform electrodeposition.Functional polymers show potentials as promising Zn anode protective layers,owing to their adjustable functional groups,rapid Zn^(2+) conduction,excellent flexibility,good film-formation and adhesion.This review summarizes the progress of functional polymers serving as zinc protective layers,and finally presents a perspective on the future development in this field.