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]E China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R 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：;WOS:【SCI-EXPANDED(收录号:WOS:000301983300024)】；

基金：The work was partially supported by Shanghai Nanotechnology Promotion Center (Grant NO. 0852 nm02300) and Shanghai International Science and Technology Cooperation Foundation (Grant No. 08230705600)

语种：英文

外文关键词：LiFePO4/CA nanocomposite; 3D conductive network structure; Impregnation; High rate performance

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 LiFePO4 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 A degrees C, 5 A degrees C, 10 A degrees C, 20 A degrees C and 40 A degrees 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 A degrees C. The good high rate performances of LiFePO4 were attributed to the unique 3D conductive network structure of the nanocomposite.