文献类型：期刊文献

英文题名：A water-soluble binary conductive binder for Si anode lithium ion battery

作者：Zheng, Mengdan[1];Wang, Chenxu[1];Xu, Yunlong[1];Li, Keqiang[1];Liu, Dong[2]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[2]XTC Corp, R&D Ctr New Energy Mat, Xiamen 361009, Fujian, Peoples R China

年份：2019

卷号：305

起止页码：555

外文期刊名：ELECTROCHIMICA ACTA

收录：;EI(收录号：20191406723143);WOS:【SCI-EXPANDED(收录号:WOS:000462774000061)】；

基金：This work is supported by Shanghai Leading Academic Discipline Project (B502), Shanghai Nanotechnology Special Foundation (No. 11nm0500900) and Shanghai Key Laboratory Project (08DZ2230500).

语种：英文

外文关键词：Water-soluble polymer; Conductive binder; Silicon anode; Lithium ion batteries

摘要：A simple yet effective polyvinyl pyrrolidone/polyaniline (PVP/PANI) co-polymer was synthesized to serve as water-soluble conductive binder for Si anode lithium ion battery (LIB) application, aiming to address its fast capacity fade and poor cycling performance. Multiple spectroscopic tests confirmed co-polymerization of individual component PVP and PANI through intermolecular hydrogen bonding and the composition of co-polymer can be easily tuned. The synthesized co-polymer is capable of greatly advancing electrochemical performance and stability of Si anode compared to conventional binders such as polyvinylidene difluoride (PVDF) and PVP and an optimal composition of PVP and PANI in terms of cell electrochemical performance was demonstrated. More detailed electrochemical and microscopic characterization reveal that considerably reduced impedance, facilitated electron transport and alleviated Si volume expansion buffer of the electrode are attributed to such improvement. Despite these merits brought by employing the co-polymer, it is also implied that a complicated trade-off exists among the electrolyte uptake, electron transport, interface resistance, and charge carriers' diffusion in the electrolyte, which is worth studying in depth in the future. (C) 2019 Elsevier Ltd. All rights reserved.