多硫化物阻隔层在锂硫电池中的应用研究进展

发布时间：2018-03-04 20:33

本文选题：锂硫电池　切入点：多硫化物阻隔层　出处：《新型炭材料》2017年02期 　论文类型：期刊论文

【摘要】：锂硫电池具有远高于锂离子电池的理论放电比容量(1 675 mAh/g)和能量密度(2 600 Wh/kg),被认为是很具应用潜力的电池体系,因此被广泛的研究和关注。然而硫的导电性能差、利用率低以及多硫化物的穿梭效应等问题使得锂硫电池的循环性能不稳定。为了克服穿梭效应的影响,近年来发展了多种新型的多硫化物阻隔层设计和制备方法来提高电池循环稳定性,本文分别从碳质材料阻隔层、金属氧化物阻隔层以及导电聚合物阻隔层三方面综述了最新的研究进展,并指出免集流体正极材料、阻隔层以及隔膜实现一体化设计将成为锂硫电池研究的发展方向。
[Abstract]:Lithium-sulfur batteries have a theoretical specific discharge capacity of 1,675 mg / g and an energy density of 2 600 mg / kg / kg, which is much higher than that of lithium-ion batteries, and is considered to be a potential battery system, so it has been widely studied and paid attention to. However, the conductivity of sulfur is poor. The low utilization ratio and the shuttle effect of polysulfide make the cycle performance of lithium-sulfur battery unstable. In recent years, a variety of new design and preparation methods of polysulfide barrier layer have been developed to improve the cycle stability of the battery. The recent research progress in metal oxide barrier layer and conductive polymer barrier layer is reviewed. It is pointed out that the integrated design of free fluid collector cathode material, barrier layer and diaphragm will become the research direction of lithium sulfur battery.
【作者单位】：天津大学化工学院;天津化学化工协同创新中心;
【基金】：国家自然科学基金(U1401243,21406161)~~
【分类号】：TM912

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