高比能锂硫电池正极材料研究进展

Progress on Cathode Materials for High Energy Density Lithium-Sulfur Batteries

锂硫电池能量密度高,原料低廉,具有成本优势,是一种最具潜力的二次电池。锂硫电池的商业化应用面临着一些技术障碍,主要表现为聚硫化物的穿梭效应、硫电导率低以及充放电过程中出现体积膨胀,导致循环寿命不佳等问题。本文综述了近年来锂硫电池硫正极复合材料的研究现状,主要总结了硫-碳、硫-金属化合物以及硫-导电聚合物复合材料三种体系的研究进展,介绍了本课题组在锂硫电池正极材料方面的部分研究成果,并对锂硫电池的未来发展趋势进行了展望。

Lithium-sulfur battery is one of the most promising secondary batteries for its high energy density and low cost.However,the commercial application of lithium-sulfur battery faces some technical obstacles,such as low cycling stability resulted from the shuttle effect of polysulfides,low electrical conductivity of sulfur,and volume expansion during charge/discharge process.In this review,the recent progress of cathode materials for lithium-sulfur battery is introduced,mainly focusing on sulfur/carbon,sulfur/conducting-polymer and sulfur/metal composite materials.Some of our recent progress on cathode materials,specifically in new sulfur/carbon and sulfur/conducting-polymer systems is presented.Finally,the development trends of lithium-sulfur battery are forecasted.