期刊
MATERIALS LETTERS
卷 59, 期 1, 页码 127-130出版社
ELSEVIER
DOI: 10.1016/j.matlet.2004.07.051
关键词
lithium-ion batteries; LiFePO4; solid-state reaction; cathode composite; carbon coating
Carbon-coated LiFePO4 cathode materials were synthesized by a one-step solid-state reaction route using inexpensive FePO4 as the iron precursor and polypropylene as both reductive agent and carbon source. The pyrolysis of polypropylene at high temperature reduces Fe3+ to Fe2+ and coats carbon on the synthesized LiFePO4 particles in situ. Electrochemical measurements show that the carbon-coated LiFePO4 reaches an initial discharge capacity of 160 mA h g(-1) at 30 degreesC and 0.1 C rate and a good cycling property at 0.3 and 0.5 C. The results indicate that the one-step solid-state reaction is a promising method suitable for mass production of LiFePO4/C Composite with improved electrochemical performances and low cost. (C) 2004 Elsevier B.V. All rights reserved.
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