Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 21, Issue 15, Pages 5604-5609Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0jm04049e
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Funding
- US Department of Energy, FreedomCAR and Vehicle Technologies Office
- US Department of Energy by UChicago Argonne, LLC [DE-AC02-06CH11357]
- Korean Government (MEST) [NRF-2009-C1AAA001-0093307]
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The phase evolution and crystal structure transition of materials during solid-state synthesis of LiFePO4 were investigated by in situ high energy X-ray diffraction. It was found that the solid state reaction forming LiFePO4 started at a very low temperature, and LiFePO4 was clearly observed when the reaction temperature was above 173 degrees C. In situ X-ray diffraction data also revealed that several impurities appeared when the reaction temperature was above 400 degrees C. These impurities were successfully indexed with ex situ X-ray diffraction as Li3PO4, Fe2P, and Fe3P.
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