高比容量锂硫电池复合正极材料_郭锦.pdf

3 4 Vol.3 No.4 2014 7 Energy Storage Science and Technology Jul. 2014 030024 Li S Li S 1675 mA·h/gLiFePO LiCoO 2 4 2 S S S doi: 10.3969/j.issn.2095-4239.2014.04.008 TM 911 A 2095-4239 201404-345-08 High specific capacity composite cathode materials for lithium-sulfur batteries GUO JinZHANG Mingang YAN ShijianSUN Gang School of Material EngineeringTaiyuan University of Science and TechnologyTaiyuan 030024ShanxiChina Abstract Because the complete reaction product of lithium and sulfur is Li2S, the theoretic capacity of elemental sulfur cathode in a lithium sulfur battery is 1675mA ·h/g, which is much higher than other cathode materials of LiFePO , LiCoO , et al. And sulfur has low price and non-toxic, which is an ideal 4 2 cathode material. However, its electrical conductivity is very low, and the capacity declines rapidly with cycling. So it is necessary to improve the conductive performance of sulfur cathode and enhance its electrochemical properties. In this paper, the preparation method, structure and morphology, electrochemical properties of sulfur-based composite cathode materials are reviewed. The combination of sulfur with mesoporous carbon, CNTs graphene and polypyrrole respectively is discussed, and the future prospect of sulfur-based cathode material is also represented. Key words lithium/sulfur battery composite materials cathode charge-discharge property 1 LiMn2O4 LiCoO LiNiO