文献类型：期刊文献

英文题名：Room-Temperature Rapid Self-Healing Polymer Binders for Si Anodes in Highly Cycling-Stable and Capacity-Maintained Lithium-Ion Batteries

作者：Wang, Fei[1];Ma, Xiang[1];Li, Yiren[2];Liu, Hongmei[1];Wu, Qingping[3];Guan, Xiang[4];Liu, Hui[5];Wang, Xiao Xia[6];Xu, Jun[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China;[2]China Petr Pipeline Engn Co Ltd Int, Langfang 065000, Peoples R China;[3]Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China;[4]Univ Manchester, Dept Mat, Manchester M13 9PL, Lancs, England;[5]China Acad Aerosp Sci & Innovat, Beijing 100176, Peoples R China;[6]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2023

卷号：6

期号：6

起止页码：3538

外文期刊名：ACS APPLIED ENERGY MATERIALS

收录：;EI(收录号：20231013693060);WOS:【SCI-EXPANDED(收录号:WOS:000944498800001)】；

基金：Financial support by the Natural Foundation of China (Funding number 52174023) and the China Petroleum Engineering Corp., Ltd. (CPEC) (2021ZYGC-01-01) is gratefully acknowledged.

语种：英文

外文关键词：lithium-ion battery; polymer binder; silicon anode; self-healing; full cell

摘要：Silicon (Si) with high specific capacity has received increasing attention for rechargeable battery anode materials. However, particle pulverization as a result of the large volume expansion of Si anodes further aggravated electrochemical performance degradation during the process of charging and discharging. In this work, we report the room-temperature rapid self-healing polymer binders (Al/Alg-TUEG) synthesized via dynamic coordination bonds (Al-O) and hydrogen bonds from poly(etherthioureas) (TUEG). The prepared polymer binders exhibit a peeling force of 4.2 N, a swelling ratio of 9.5%, and a recovery of 90% in 2 h at room temperature. As a result, the Si@Al/Alg-TUEG anodes stably cycle for 300 cycles at 0.5 C with a capacity retention rate of 77.4%. A high initial Coulombic efficiency (CE) of 87.2% and good rate performance are also achieved. In terms of full cell performance, both LiFePO4//Si@Al/Alg-TUEG and NCM811//Si@Al/Alg-TUEG display stable cycling for 100 cycles at 0.5 C. The capacity retention of both full cells reaches 93.8 and 92.5%. Good recoverability at high rates is also found. The superior electrochemical performance of the Si anode indicates that Al/Alg-TUEG polymer with rapid self-healing capability at room-temperature is one of the promising binder candidates for next-generation high-energy-density lithium-ion batteries.