Synthesis and structural analysis of lithium nickel vanadate

The compound LixNiVO4 (x = 0.8; 1.0; 1.2) has been prepared by a solid state reaction method at 800 °C. The X-ray diffraction pattern of Li1.2NiVO4 shows the absence of the (1 1 1) line, indicating the occupation of more vanadium ions on the tetrahedrally coordinated interstices. The averaged size of the particles and the grain size have been found to be around 2–10 μm. The grain interior and grain boundary resistance values are found to be 4.08 × 105 and 1.45 × 106 Ω cm−1 at 573 K. The formal activation energy, describing the temperature dependence of conductivity of Li0.8NiVO4, was found to be 0.64 eV.