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

doi:10.16085/j.issn.1000-6613.2015.05.026

Abstract

Abstract: 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.

Key words: lithium-sulfur battery, sulfur cathode, composites, electrochemistry, polymers

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.

关键词: 锂硫电池, 硫正极, 复合材料, 电化学, 聚合物

CLC Number:

TM912.9

YANG Rong, DENG Kunfa, LIU Xiaoyan, QU Ye, LEI Jing, REN Bing. Recent progress of sulfur composites as cathode materials for lithium sulfur batteries[J]. Chemical Industry and Engineering Progree, 2015, 34(05): 1340-1344.

杨蓉, 邓坤发, 刘晓艳, 曲冶, 雷京, 任冰. 锂硫电池正极复合材料研究现状[J]. 化工进展, 2015, 34(05): 1340-1344.

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