Defect and Surface Area Control in Hydrothermally Synthesized LiMn0.8Fe0.2PO4 Using a Phosphate Based Structure Directing Agent
CRYSTAL GROWTH & DESIGN(2015)
摘要
As confirmed by ion coupled plasma-optical emission spectroscopy and powder X-ray diffraction, stoichiometrically pure samples of olivine type LiFe0.2Mn0.8PO4 04 in the presence of a phosphoric acid ester based structure directing agent have been prepared. A Rietveld analysis of X-ray and n(0) diffraction data suggests that the solids are largely free of defect occupation of Fe at the lithium sites. This is confirmed by Fe-57-Mossbauer spectroscopic investigations. The use of the structure directing surfactant results in significantly higher specific surface areas (SSA) and smaller particle sizes as compared to samples prepared without using a surfactant.
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