文献类型：期刊文献

英文题名：Sulfur electrode tolerance and polysulfide conversion promoted by the supramolecular binder with rare-earth catalysis in lithium-sulfur batteries

作者：Zhou, Feixiang[1,2];Mei, Yuhan[2,3];Wu, Qingping[2,3];Li, Huan[2,3];Xu, Jun[1];Chen, Houyang[2,3]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China;[3]Univ Chinese Acad Sci, Chongqing Sch, Chongqing 400714, Peoples R China

年份：2024

卷号：67

外文期刊名：ENERGY STORAGE MATERIALS

收录：;EI(收录号：20241015697014);WOS:【SCI-EXPANDED(收录号:WOS:001202570000001)】；

基金：Acknowledgements This work is supported by China Postdoctoral Science Foundation (Grant No. 2022M713078) , Natural Science Foundation of Chongqing (CSTB2023NSCQ-MSX0045) , the Startup Foundation of Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sci- ences. Computations were performed on Hefei advanced computing center. The authors acknowledge Beijing PARATERA Tech CO., Ltd for providing HPC resources that have contributed to the research results reported within this paper. URL: https://paratera.com /.

语种：英文

外文关键词：Lithium -sulfur batteries; Environmental -friendly binder; Supramolecular chemistry; Rare-earth catalysis; Reaction kinetics

摘要：The binder that maintains electrode integrity and provides electron/ion transport channels is insufficient for high-performance lithium -sulfur (Li -S) batteries. Multifunctional and environmentally friendly binders with minimal lithium polysulfides (LiPSs) escape and accelerated LiPSs conversion kinetics are critical for sustainable Li -S batteries. Herein, we proposed a new versatile supramolecular polymer binder synthesized by hydrogen bonding crosslinking between hydrolysable polymer matrix and yttrium -pyridine complex in aqueous solutions, denoted as GB -Y. This unique environmental -friendly binder based on supramolecular chemistry could (1) maintain the integrity of sulfur cathode through the mechanical toughness contributed by synergistic effect of hydrogen bonds and robust chemical bonds, (2) anchor LiPSs by lithiophilic effects, and (3) accelerate LiPSs conversion by electrocatalysis of rare-earth catalysis sites (Y3+) as Lewis acids. With above benefits of GB -Y binder, the Li -S batteries with GB -Y binder deliver a high discharge capacity of 1201.5 mAh g - 1 and an excellent cyclability over 800 cycles. This binder exhibits a commercial potential in view of capacity release under high -sulfur loading of 6.56 mg cm -2 with lean electrolyte (electrolyte/sulfur (E/S) ratio of 10 mu l mg- 1). This study provides a concept of binders with three efficacies, i.e. adhesion, adsorption, and catalysis, and offers an innovative and environmentally friendly strategy for the construction of advanced binder with supramolecular chemistry manner to promote the practical application of Li -S batteries.