摘要
锂硫电池理论能量密度高(2 600 W·h/kg)、硫原料丰富、成本低,是最有发展前景的锂二次电池技术之一。然而硫以及放电产物硫化锂电导率低,电化学反应过程中生成的可溶性多硫化物的"穿梭效应"以及电池充放电过程中电极的体积效应等,影响了锂硫电池性能的发挥,阻碍了锂硫电池实用化进程。近年来,通过电极材料的设计、电极表界面的修饰以及电解液体系优化,锂硫电池的性能得到显著提升。综述了近年来锂硫电池中硫正极、隔膜和金属Li表界面修饰方面的研究进展。
Owing to the high theoretical energy density, natural abundance, and low cost, lithium sulfur battery becomes a promising candidate for the next generation rechargeable secondary batteries. However, the commercialization of lithium sulfur battery is inhibited by the insulating nature of sulfur and Li2S, ＂shuttle effect＂ caused by the soluble polysulfides in organic electrolyte as well as volume change during the charge/discharge process. In recent years, the performance of lithium sulfur battery was improved significantly by designing the structure of electrode materials, modifying the surface and optimizing the electrolyte. This paper summarizes the research progress in the interface modification of sulfur cathode, separator and lithium metal electrode of lithium-sulfur battery.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2017年第10期1367-1381,共15页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金(51402330
51472261
51372262)
关键词
锂硫电池
硫正极
隔膜
金属锂负极
修饰
lithium sulfur batteries
sulfur cathode
separator
lithium anode
modification
