期刊
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
卷 12, 期 7-8, 页码 1011-1015出版社
SPRINGER
DOI: 10.1007/s10008-007-0478-y
关键词
LiFePO4; carbothermal reduction; lithium ion battery
Using the cheap raw materials lithium carbonate, iron phosphate, and carbon, LiFePO4/C composite can be obtained from the carbothermal reduction method. X-ray diffraction (XRD) and scanning electronic microscope (SEM) observations were used to investigate the structure and morphology of LiFePO4/C. The LiFePO4 particles were coated by smaller carbon particles. LiFePO4/C obtained at 750 C presents good electrochemical performance with an initial discharge capacity of 133 mAh/g, capacity retention of 128 mAh/g after 20 cycles, and a diffusion coefficient of lithium ions in the LiFePO4/C of 8.80x10(-13) cm(2)/s, which is just a little lower than that of LiFePO4/C obtained from the solid-state reaction (9.20x10(-13) cm(2)/s) by using FeC2O4 as a precursor.
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