锂蓄电池PEO基全固态聚合物电解质研究进展

Research on PEO-based dry solid polymer electrolytes for rechargeable lithium batteries

从提高锂蓄电池聚环氧乙烷(PEO)基全固态聚合物电解质的电导率、锂离子迁移数和改善电解质与锂电极之间的界面稳定性三个方面介绍了其研究进展。复合聚合物电解质的机械性能和电化学性能都有较大的提高,有利于实现锂蓄电池的商品化。此外,还讨论了PEO基全固态聚合物电解质的导电机理和界面稳定机理,特别是无机陶瓷粉末的加入对提高电解质电导率和界面稳定性等方面的作用机理。

Research on PEO-based dry solid polymer electrolytes for rechargeable lithium batteries was introduced from three aspects which were improving the conductivity, enhancing the number of lithium ion transference and modifying the stability of electrolyte/lithium metal electrode interface. Composite polymer electrolytes had better mechanical and electrochemical properties, which were benefit for the commercialization of rechargeable lithium batteries. Moreover, the mechanisms of lithium ion conduction in PEO-based dry solid polymer electrolytes and of the stabilization interface were discussed, especially the mechanisms of improving the conductivity and the stability of interface with the addition of inorganic ceramic powder.