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

Molybdenum oxyfluoride MoO2.8F0.2 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 MoO3 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 MoO2.8F0.2 and MoO3, respectively.