锂硫电池隔膜修饰材料研究进展

Research Progress on Separator Modification Materials for Lithium-sulfur Batteries

锂硫电池拥有较高理论比容量和能量密度,同时电池本身的经济性和环境友好性也比较突出,所以近年来成为能源电池领域研究的热点。但是其内部多硫化物的穿梭效应会严重影响电池的循环性能以及库伦效率,阻碍锂硫电池商业化。研究表明,通过对锂硫电池内部的隔膜进行修饰可以一定程度制约这种穿梭效应。目前重点修饰材料大致分为金属类、碳类和聚合物类。

Lithium-sulfur batteries have high theoretical specific capacity and energy density,and the economy and environmental friendliness of the battery itself are also prominent,so they have become a hot spot in the field of energy batteries in recent years.However,the shuttle effect of polysulfides in the battery will seriously affect the cycling performance and coulombic efficiency of the battery,hindering the commercialization of lithium-sulfur batteries.The results show that the shuttle effect can be limited to a certain extent by modifying the separator inside the lithium-sulfur battery.At present,the key modified materials are roughly divided into metals,carbons and polymers.