期刊
SOLID STATE SCIENCES
卷 14, 期 8, 页码 1238-1243出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solidstatesciences.2012.06.010
关键词
Lithium iron phosphate; Polypyrrole; Polyethylene glycol; Lithium-ion batteries; XPS
资金
- Slovak Grant Agency VEGA [1/0211/12, 2/0168/12, VVGS 51/12-13]
High performance PPy/PEG-LiFePO4 nanocomposites as cathode materials were synthesized by solvothermal method and simple chemical oxidative polymerization of pyrrole (Py) monomer on the surface of LiFePO4 particles. The samples were characterized by scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDX), x-ray photoelectron spectrometry (XPS) and charge-discharge tests. PPyPEG hybrid layers decrease particle to particle contact resistance while the impedance measurements confirmed that the coating of PPy-PEG significantly decreases the charge transfer resistance of the electrode material. The initial discharge capacities of this sample at C/5 and 1C are 150 and 128 mAh/g, respectively. The results show that PPy/PEGLiFePO(4) composites are more effective than bare LiFePO4 as cathode material. (C) 2012 Elsevier Masson SAS. All rights reserved.
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