文献类型：期刊文献

英文题名：LiFePO4/CA cathode nanocomposite with 3D conductive network structure for Li-ion battery

作者：Jiang, Qiong[1]; Xu, Yunlong[1]; Zhao, Chongjun[1]; Qian, Xiuzhen[1]; Zheng, Shaowei[1]

机构：[1] Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China

年份：2012

卷号：16

期号：4

起止页码：1503

外文期刊名：Journal of Solid State Electrochemistry

收录：EI(收录号：20122615178449)

语种：英文

外文关键词：Lithium-ion batteries - Impregnation - Nanocomposites - Iron compounds - X ray diffraction - Electric discharges - Aerogels - Electrodes

摘要：A novel LiFePO4/Carbon aerogel (LFP/CA) nanocomposite with 3D conductive network structure was synthesized by using carbon aerogels as both template and conductive framework, and subsequently wet impregnating LiFePO 4 precursor inside. The LFP/CA nanocomposite was characterized by X-ray diffraction (XRD), TG, SEM, TEM, nitrogen sorption, electrochemical impedance spectra and charge/discharge test. It was found that the LFP/CA featured a 3D conductive network structure with LiFePO4 nanoparticles ca. 10-30 nm coated on the inside wall of the pore of CA. The LFP/CA electrodes delivered discharge capacity for LiFePO4 of 157.4, 147.2, 139.7, 116.3 and 91.8 mA h g-1 at 1 °C, 5 °C, 10 °C, 20 °C and 40 °C, respectively. In addition, the LFP/CA electrode exhibited good cycling performance, which lost less than 1% of discharge capacity over 100 cycles at a rate of 10 °C. The good high rate performances of LiFePO 4 were attributed to the unique 3D conductive network structure of the nanocomposite. ? 2011 Springer-Verlag.