文献类型：期刊文献

英文题名：Incorporating cyclized-Polyacrylonitrile with Li4Ti5O12 Nanosheet for High Performance Lithium Ion Battery Anode Material

作者：Sun, Yunong[1];Dong, Hui[1];Xu, Yunlong[1];Zhang, Yang[1];Zhao, Chongjun[1];Wang, Di[1];Liu, Zhe[1];Liu, Dong[2]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[2]Univ Texas Arlington, Dept Mat Sci & Engn, Arlington, TX 76019 USA

年份：2017

卷号：246

起止页码：106

外文期刊名：ELECTROCHIMICA ACTA

收录：;EI(收录号：20172403790392);WOS:【SCI-EXPANDED(收录号:WOS:000406942800013)】；

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：Li4Ti5O12; Nanosheet; Hydrothermal; Polyacrylonitrile; Lithium ion battery

摘要：Developing practically meaningful conductive- and binder-free electrode material for lithium ion battery has been of great interest in recently years. In this study, we describe a facile synthesis of cyclized-Polyacrylonitrile (PAN)/Li4Ti5O12 (LTO) nanosheet lithium ion battery anode material by one-pot hydrothermal approach followed by cyclization of the polymer at intermediate temperature. The obtained product was thoroughly characterized by powder XRD, Raman, TG-DSC, XPS, electron microscopy, EDS, BET and electrochemical methods The cyclized polymer does not alter crystal structure of LTO but goes through turbostratic transition to create sp(2)-pi bonding and graphitic carbon at it course of conjugation. Electrochemical tests revealed the composite heightened electronic and ionic conductivity, rate capability, cycling performance, and significantly reduced charge transfer resistance than pure LTO, especially under the low temperatures. The boosted battery performance is on the ground that sp(2)-pi bonding and graphitic carbon during the cyclization of PAN contribute significantly to charge transfer process. These results strongly suggest this method a cost-effective way producing high performance LTO material and may be applied to other lithium ion battery electrode material as well. (C) 2017 Elsevier Ltd. All rights reserved.