期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 660, 期 1, 页码 108-113出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2011.06.013
关键词
Lithium iron phosphate; Polyaniline; Self-assembly; Electrochemical performance; Lithium-ion batteries
资金
- Natural Science Foundation of Distinguished Young Scientists [50825203]
- 863 program [2009AA03Z225, 2011AA11290]
- Natural Science Foundation of Hubei Province [2008CDA026]
- PCSIRT (Program for Changjiang Scholars and Innovative Research Team in University)
Carbon-coated LiFePO4 (C-LFP) composites incorporated with electrochemically-active conducting polymer polyaniline (PANI) are fabricated via a self-assembly process. Inorganic acids HCl, H2SO4 and H3PO4 are used as dopants for PANI. The C-LFP/PANI composites are characterized by thermogravimetric analysis, scanning electron microscopy, electrochemical impedance spectroscopy, Raman spectra and four-probe resistivity measurements. Our results show that a remarkable improvement in capacity and rate capability can be achieved in the C-LFP/PANI composite cathodes doped with HCl and H3PO4. The C-LFP/PANI-HCl composite exhibits the best electrochemical performance, which gives a ca. 15% capacity enhancement at 0.2 C and 40% enhancement at 5 C compared to the parent C-LFP. The mechanism for the enhancement has been discussed. (C) 2011 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据