Emulsion drying preparation of layered LiMnxCr1−xO2 solid solution and its application to Li-ion battery cathode material

Lithium–chromium–manganese oxides, LiMnxCr1−xO2 (0≤x≤0.6), were synthesized as solid solutions by simple calcination of emulsion-dried powder precursor. The product was well crystallized to an α-NaFeO2 structure (space group: image). By combination of Rietveld analysis of X-ray diffraction data and X-ray absorption near edge structure (XANES) techniques, the final product is considered to be [LiI]3aoct[MnxIIICr1−xIII]3boct[O2]6c (0≤x≤0.6). The prepared oxides were electrochemically active, and capacity as cathode materials for lithium-ion battery was improved with increasing Mn substitution amount.