文献类型：期刊文献

英文题名：Polyaniline-Coated Cobalt-Iron Oxide Composites Modified Separator for High Performance Lithium-Sulfur Batteries

作者：Li, Zilong[1];Cong, Yuchen[1];Zhao, Jiayi[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：2024

卷号：6

期号：5

起止页码：3780

外文期刊名：ACS APPLIED ELECTRONIC MATERIALS

收录：;EI(收录号：20242016085546);WOS:【SCI-EXPANDED(收录号:WOS:001225204900001)】；

基金：This work was financially supported by the National Key R&D Program 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; polyaniline; cobalt-iron oxide; separator; electrochemicalperformance

摘要：Lithium-sulfur (Li-S) batteries have a supreme theoretical energy density, which makes them a promising candidate for energy storage. However, the persistent challenge of polysulfide dissolution hinders their extensive adoption. In this study, we developed polyaniline-coated cobalt-iron oxide composites (CFOP) to embellish separators for Li-S batteries via a straightforward calcination, followed by an in situ oxidation polymerization technique. Owing to the synergistic impact of bimetallic oxides and PANi coating, the CFOP-modified separator exhibited improved electrical conductivity and polysulfide adsorption capabilities. At 0.1 C, the sulfur cathode with CFOP modified separator showed a high discharge capacity of 1489.4 mAhg(-1). For the electrode with high sulfur loading (>3 mgcm(-2)), it delivered an incipient capacity of 810.9 mAhg(-1) and sustained 498.1 mAhg(-1) after long cycles (300 cycles at 0.5 C). In summary, the CFOP-modified separator successfully mitigated polysulfide shuttling, leading to enhanced electrochemical performance. This research offers valuable views into Li-S battery separator modification.