高性能锂硫电池正极复合材料研究现状  

Research Status of Cathode Composite Materials for High-performance Lithium-sulfur Batteries

作　　者：秦海超 燕映霖[1] 杨蓉[2] 李巧乐 王岩 陈利萍[1] QIN Haichao;YAN Yinglin;YANG Rong;LI Qiaole;WANG Yan;CHEN Liping(School of Materials Science and Engineering,Xi’an University of Technology,Xi’an 710048,China;Institute of Chemical Power Sources,School of Sciences,Xi’an University of Technology,Xi’an 710048,China)

机构地区：[1]西安理工大学材料科学与工程学院,西安710048 [2]西安理工大学理学院化学电源研究所,西安710048

出　　处：《电源学报》2018年第6期179-185,共7页Journal of Power Supply

基　　金：国家国际科技合作专项资助项目(2015DFR50350);陕西省教育厅自然科学专项资助项目(15JK1536;15JK15 38)~~

摘　　要：锂硫电池具有理论比容量高(1 675 mA·h/g)、硫资源丰富、环境友好无毒和价格低廉等优点,是下一代二次电池的研究重点。单质硫作为锂硫电池正极材料时,其导电性差、中间产物溶解及放电过程体积膨胀导致的电化学性能衰减,严重制约着锂硫电池的商品化。对单质硫进行复合是目前主要的改性方法和研究热点。综述了吸附型、包覆型和多元复合型等多种硫基正极复合材料的研究现状,分析了复合材料微观结构对其电化学性能的影响,并展望了硫基正极复合材料及锂硫电池的发展前景。Lithium-sulfur(Li-S)batteries have many advantages,such as higher theoretical capacity(1 675 mAh/g),abundant sources of S,environmental friendliness and nontoxicity,as well as low cost.Therefore,they have become a research focus of rechargeable battery in the next generation.When elemental sulfur is used as cathode material for Li-S batteries,it has several disadvantages,including poor electrical conductivity,dissolution of mid-product,and deterioration of electrochemical performance due to volume expansion during discharging,which seriously restrict the commercialization of Li-S batteries.At present,sulfur-based composite is one of the main modification methods and a hot research spot.In this paper,the research status of sulfur-based cathode composite materials was reviewed,including types of adsorption,coating,and multi-component;the effect of composite microstructure on the electrochemical performance was analyzed;moreover,the development outlook of the sulfur-based cathode composite materials and Li-S batteries was provided.

关 键 词：锂硫电池 正极材料 复合材料 微观结构 

分 类 号：TM912.9[电气工程—电力电子与电力传动]