PEO基固态电解质不耐氧化原因分析与研究现状

Cause Analysis and Research Status of Intolerance Oxidizing for PEO-based Solid Electrolyte

传统的有机液体电解质存在自燃甚至爆炸等安全隐患,使用热稳定性更高的固态电解质(SSE)替代易燃的液态电解质,可以有效缓解这些安全问题。SSE因具有良好的机械强度,可以有效抑制锂枝晶的生长,有着良好的应用前景,特别是聚氧化乙烯(PEO)类电解质。但是,PEO的不耐氧化性也进一步限制了其在高能量密度的全固态高压电极体系的应用。

Traditional organic liquid electrolytes have safety risks,such as spontaneous combustion and even explosion.Using solid-state electrolyte(SSE)with higher thermal stability to replace flammable liquid electrolyte can effectively alleviate these safety problems.SSE can effectively inhibit the growth of lithium dendrite because of its good mechanical strength,and has a good application prospect,especially polyvinyl oxide(PEO)electrolyte.However,the lack of oxidation resistance of PEO further limits its application in high energy density all-solid-state high voltage electrode systems.