锂/硫电池硫基复合电极材料的新进展

New development of S-based composite electrode material for Li/S batteries

锂/硫电池因其较高的理论能量密度被认为是最有前途的下一代高能二次电池,但是由于硫的导电性差、穿梭效应、体积膨胀效应等缺陷阻碍了其发展。介绍了硫/碳复合材料、硫/金属有机框架复合材料等载体材料与硫复合的新的制备方法及研究进展。其中硫/金属有机框架复合电极材料(S@Co-N-GC)的可逆容量达到了1 670mAh/g,非常接近于硫的理论比容量1 675mAh/g,有望在未来的3~5年中实现广泛的商品化。

Due to its high theoretical energy density,lithium-sulfur battery is considered as the most promising and high-energy secondary battery for next-generation.However,its development is hindered by some defects such as poor conductivity,shuttling effect and volume expansion effect of sulfur electrode.In this paper,the current research progress of sulfur/carbon composites,sulfur/metal-organic framework composites and new preparation methods of compounding matrix materials with sulfur were presented.Moreover,the specific capacity of S@Co-N-graphite electrode material got to 1 670 mAh/g at the current density of 0.05 C,which was closed to the theoretical capacity of 1 675 mAh/g.Therefore,the lithium-sulfur battery will be widely used in the near following years.