文献类型：期刊文献

英文题名：Enhanced high rate and low-temperature performances of mesoporous LiFePO4/Ketjen Black nanocomposite cathode material

作者：Yang, Xu[1];Xu, Yunlong[1];Zhang, Huang[1];Huang, Yong'an[1];Jiang, Qiong[1];Zhao, Chongjun[1]

机构：[1]E China Univ Sci & Technol, Shanghai Key Lab Adv Polymer Mat, Sch Mat Sci & Engn, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China

年份：2013

卷号：114

起止页码：259

外文期刊名：ELECTROCHIMICA ACTA

收录：;EI(收录号：20134716995415);WOS:【SCI-EXPANDED(收录号:WOS:000330487800034)】；

基金：The work is supported by Shanghai Leading Academic Discipline Project (B502) and Shanghai Key Laboratory Project (08DZ2230500).

语种：英文

外文关键词：LiFePO4; Ketjen Black; Nanocomposite; Electrochemical properties

摘要：The well-crystallized LiFePO4 cathode material was synthesized by liquid deposition method using mesoporous Ketjen Black (KB) as template. The LiFePO4/KB nanocomposite was characterized by X-ray diffraction (XRD), TG, SEM, HR-TEM, nitrogen sorption, galvanostatic charge/discharge test and EIS. The results indicate that the LiFePO4 particles about 10 nm were embedded in the mesoporous of Ketjen Black. The composite has an uniform particle size and 3D network structure, which delivers a discharge capacity of 120.2 mAh/g, 100.1 mAh/g, 85.5 mAh/g and 64.5 mAh/g at 1C, 5C, 10C and 20C under -20 degrees C respectively. Moreover, the composite also exhibit relatively high cycling performance and the capacity maintains 93.6% at 5C and 91.2% at 10C under -20 degrees C after 200 cycles. The stable high rate performance possibly fulfills the requirements of rechargeable lithium batteries for high power applications especially at low temperature. (C) 2013 Elsevier Ltd. All rights reserved.