锂硫电池正极复合材料研究现状  

Recent progress of sulfur composites as cathode materials for lithium sulfur batteries

作　　者：杨蓉[1] 邓坤发 刘晓艳[1] 曲冶[1] 雷京[1] 任冰[2] 

机构地区：[1]西安理工大学理学院,陕西西安710048 [2]西安理工大学材料科学与工程学院,陕西西安710048

出　　处：《化工进展》2015年第5期1340-1344,共5页Chemical Industry and Engineering Progress

基　　金：国家国际科技合作专项(2015DFR50350);国家自然科学基金(21276208);陕西省教育厅自然科学专项项目(14JK1531);西安理工大学校创新项目(2014CX024)

摘　　要：锂硫电池由于其高理论能量密度(2600W?h/kg)而受到了广泛的关注,是极具应用前景的电池体系。硫基正极材料作为锂硫电池的重要组成部分,是提高电池性能的关键。然而锂硫电池还存在一些问题,如硫的利用率低及正极结构的稳定性差等。本文综述了近几年锂硫电池硫正极复合材料的研究现状,分别从硫/碳复合、硫/导电聚合物复合、硫/氧化物复合3个方面进行介绍,指出了未来锂硫电池正极材料要注意结合硫/导电聚合物及硫/氧化物的优势并注重材料结构的设计,向核壳或类核壳结构方向发展的趋势,同时还要提高载硫量,提高循环稳定性,以获得高性能的锂硫电池。As a promising battery system, lithium-sulfur battery with high theoretical energy density （2600W.h/kg） has attracted great attention. As one of the essential ingredients for lithium-sulfur batteries, sulfur cathode material is the key to improve the performance of batteries. However, there are some serious and unavoidable problems for lithium-sulfur battery, such as low utilization efficiency of sulfur in cathode and poor stability of electrode structure. In this review, the recent progress of sulfur composites as cathode materials for lithium-sulfur batteries is introduced. Cathode materials are divided into three kinds of composites, such as sulfur/carbon, sulfur/polymer and sulfur/oxide composite materials, which are discussed respectively. It is pointed out that the coming development of cathode materials for lithium-sulfur batteries should be focused on the combination of advantages of sulfur/polymer and sulfur/oxide composite materials, and the design of material structure, such as core-shell or core-shell-like structure for cathode materials. At the same time, high sulfur loading and high cycle stability will be good for the performance improvement of lithium-sulfur batteries.

关 键 词：锂硫电池 硫正极 复合材料 电化学 聚合物 

分 类 号：TM912.9[电气工程—电力电子与电力传动]