Fluorine substituted molybdenum oxide as cathode material for Li-ion battery

Abstract Molybdenum oxyfluoride MoO 2.8 F 0.2 has been synthesized by solid-phase method. Its morphological and structural features were studied by scanning electron microscopy and X-ray powder diffraction. It was established that the substitution of the O atoms for F atoms in MoO 3 structure leads to charge redistribution in the crystal lattice and conductivity increasing from 4.4·10 −9  S cm −1 to 1.8·10 −6  S cm −1 . It was shown that molybdenum oxyfluoride characterized by higher discharge–charge stability in comparison with the oxide itself: 10-fold cycling in the range from 3.5 to 1.5 V yields 160 mA h g −1 and 120 mA h g −1 for MoO 2.8 F 0.2 and MoO 3 , respectively.