Journal
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume 154, Issue 8, Pages A805-A809Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/1.2746804
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LiFePO4 films with a thickness of 1 mu m were deposited on a stainless steel substrate by radio-frequency magnetron sputtering of a LiFePO4/carbon composite target. Raman spectra revealed the presence of carbon in the film, which increased the electronic conductivity of the film relative to reports of the carbon-free material. X-ray diffraction revealed that the films were well crystallized, free of second phases, and may have a texture with a (011) orientation. The LiFePO4 plus carbon film showed a good capacity and rate capability at 25 degrees and -20 degrees C when cycled as the cathode of a lithium battery, although the film was still inferior to the carbon-coated LiFePO4 powder electrodes with 0.5 mu m particle size. (c) 2007 The Electrochemical Society.
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