The Phase Structure of Fe Doped LiFeXMn2-XO4 Prepared by a Molten-Salt Combustion Synthesis
Fe doped LiFexMn2-xO4 materials were prepared by a low-temperature molten-salt combustion synthesis method. The phase structure and compositions of the products were determined by X-ray diffraction (XRD). The investigation on Fe doping content indicated that the main phase of the as-prepared products was LiFexMn2-xO4, and the impurity was Mn2O3. With increasing Fe doping content, the relative content of Mn2O3 and the lattice parameter of the products were decreased, and the crystallinity was increased. The study of the calcination temperature on LiFe0.1Mn1.9O4 suggested that the main phase of the LiFe0.1Mn1.9O4 materials prepared at 300-600°C was LiFe0.1Mn1.9O4. Mn3O4 and MnO impurities could be investigated in the product prepared at 300°C, and single impurity Mn2O3 could be observed in the products prepared at 400-600°C. The relative content of Mn2O3 decreased, and the lattice parameters and grain size of the products were increased with increasing calcination temperatures.
G. Y. Liu et al., "The Phase Structure of Fe Doped LiFeXMn2-XO4 Prepared by a Molten-Salt Combustion Synthesis", Applied Mechanics and Materials, Vols. 66-68, pp. 772-775, 2011