文献类型：期刊文献

英文题名：Polyaniline-coated S/Super-P composites as cathode materials for high performance lithium-sulfur batteries

作者：Li, Zilong[1];Wang, Bin[1];Su, Haiping[1];Shang, Yazhuo[1];Liu, Honglai[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2023

卷号：18

期号：12

外文期刊名：INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001110997300001)】；

基金：This work was financially supported by the National Key R & D Pro-gram of China (2022YFA1503501) , and the Fundamental Research Funds for the Central Universities (2022ZFJH004) .

语种：英文

外文关键词：Lithium-sulfur batteries; HEBM; Polyaniline; Cathode material; Electrochemical performance

摘要：Lithium-sulfur (Li-S) batteries are promising alternatives to conventional lithium-ion batteries owing to their high theoretical capacity and eco-friendliness. However, their commercialization has been limited due to poor cathode conductivity and polysulfide dissolution. In this study, we synthesized a S/Super-P @ Polyaniline (S/ Super-P @ PANi) composite via a straightforward high-energy ball milling (HEBM) and in-situ oxidative polymerization process. The refined sulfur and Super-P particles were encapsulated by a conductive PANi coating shell, which not only facilitated electron transfer but also inhibited the dissolution of lithium polysulfides through physical confinement and chemical adsorption. The S/Super-P @ PANi electrode showed a high initial capacity of 1185.3 mAh center dot g- 1 at 0.1 C. Under a sulfur loading of 3.5 mg center dot cm- 2, the electrode delivered an areal capacity of 2.8 mAh cm-2 and maintained 1.8 mAh cm-2 after 400 cycles, with a capacity decay rate of 0.08% at 0.5 C. This rational and scalable synthesis method has great potential for use in high-performance Li-S batteries.