文献类型：期刊文献

英文题名：Improving the performance of PEDOT-PSS coated sulfur@activated porous graphene composite cathodes for lithium-sulfur batteries

作者：Li, Han[1];Sun, Minqiang[1];Zhang, Tao[1];Fang, Yuqian[1];Wang, Gengchao[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China

年份：2014

卷号：2

期号：43

起止页码：18345

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20144400131343);WOS:【SCI-EXPANDED(收录号:WOS:000344380000027)】；

基金：We greatly appreciate the financial supports of National Natural Science Foundation of China (51173042), Fundamental Research Funds for the Central Universities, Shanghai Municipal Science and Technology Commission (12nm0504102).

语种：英文

外文关键词：Conducting polymers - Lithium batteries - Graphene - Cathodes

摘要：A novel PEDOT-PSS coated sulfur@activated porous graphene composite (PEDOT/S@aPG) is prepared by the impregnation of sulfur with aPG and encapsulation with PEDOT-PSS as the cathode material for lithium-sulfur batteries. The abundant nanopores and large surface area of aPG can provide an intimate contact and strong interaction with S species. Furthermore, the conductive PEDOT-PSS layer can facilitate the charge transportation and prevent the dissolution of polysulfides. As a result, the as-prepared PEDOT/S@aPG composite cathode with a sulfur content of about 60.1% shows a higher specific discharge capacity (1198 mA h g(-1) at 0.1 C) in the first cycle and good cycling stability, retaining a reversible capacity of 845 mA h g(-1) after 200 cycles. Moreover, the PEDOT/S@aPG cathode also exhibits excellent rate capability, showing a high reversible capacity of 718 mA h g(-1) at 2 C.