锂硫电池硫正极技术研究进展

doi:10.12028/j.issn.2095-4239.2018.0029

摘要/Abstract

摘要： 锂硫电池具有能量密度高、原料低廉、绿色环保等优势，已成为下一代高性能二次电池的研究热点，但是活性材料利用率低、容量衰减较快、自放电严重等问题，极大地阻碍了该电池的实用化进程。正极是电池的核心部件，要实现锂硫电池的性能提升，必须对硫正极的组分结构进行合理的设计与构建。本文首先分析锂硫电池的工作原理、存在问题及解决途径，然后分别从硫正极的活性材料、集流体、表面涂层、黏结剂、添加剂等5个方面对当前的研究现状进行总结，最后对其未来的发展前景做出展望，文章指出，硫正极更应关注真实的能量密度水平，而锂硫电池的研究视野不应局限于正极材料。

关键词: 锂硫电池, 多硫化物, 正极材料, 集流体, 涂层, 黏结剂

Abstract: Lithium sulfur (Li-S) battery has become a hotspot of next-generation high-performance secondary batteries in recent years, by virtue of the advantages of high energy density, low cost, favorable environmental friendliness. However, low utilization of active materials, rapid capacity decay and serious self-discharge greatly hindered its practical application. Since cathode is a key component of rechargeable battery, it is very necessary to design and construct rationally the constitution and structure of sulfur cathode for improving the cell performances. In this paper, basic principles, existent problems and solving approaches of Li-S battery were analyzed at first. Then, the research progresses on active material, current collector, coating layer, binder and additive of sulfur cathode were reviewed. Finally, the further developing prospects of the battery were discussed. It is pointed out that more attention should be paid to real energy density of sulfur cathode, and research scope of Li-S battery should not be limited to cathode material.

Key words: lithium sulfur battery, polysulfide, cathode material, current collector, coating, binder

中图分类号:

O646
TM911

袁艳, 郑东东, 方钊, 刘漫博, 李涛. 锂硫电池硫正极技术研究进展[J]. 储能科学与技术, 2018, 7(4): 618-630.

YUAN Yan, ZHENG Dongdong, FANG Zhao, LIU Manbo, LI Tao. Research progress on sulfur cathode of lithium sulfur battery[J]. Energy Storage Science and Technology, 2018, 7(4): 618-630.

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