锂硫电池中的表面修饰

发布时间：2018-03-21 03:09

本文选题：锂硫电池　切入点：硫正极　出处：《硅酸盐学报》2017年10期 　论文类型：期刊论文

【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。
[Abstract]:The theoretical energy density of lithium-sulfur battery is 2 600 W 路h / kg 路kg ~ (-1), and sulfur is rich in raw materials and low in cost. It is one of the most promising lithium secondary battery technologies. However, the conductivity of lithium sulfide and its discharge product is low. The "shuttle effect" of soluble polysulfide produced during electrochemical reaction and the volume effect of electrode during the charging and discharging of the battery affect the performance of the lithium-sulfur battery and hinder the practical process of the lithium-sulfur battery. Through the design of electrode materials, the modification of electrode surface interface and the optimization of electrolyte system, the performance of lithium-sulfur battery has been improved significantly. The recent progress in the modification of sulfur positive electrode, diaphragm and metal Li surface in lithium-sulfur battery is reviewed.
【作者单位】：中国科学院上海硅酸盐研究所;
【基金】：国家自然科学基金(51402330,51472261,51372262)
【分类号】：TM912

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