Synthesis and Characterization of High-Quality Polycrystalline Sample NiV2O6 by Solid-State Reaction Technique

Employing the solid-state reaction route, good quality polycrystalline sample NiV 2 O 6 is prepared that has effective application in rechargeable Li-ion batteries. The raw materials NiO and V 2 O 5 (purity >99%) were used for the fabrication of NiV 2 O 6 . The phase formation and thermal stability of this sample were measured by thermogravimetric analyzer. The micro-structural feature of this sample was measured by scanning electron microscopy (SEM). The SEM images ensured that the product NiV 2 O 6 is very uniform and well-separated and consists of large grain size of about 1–5 μm. The crystal structure and bonding characteristics of NiV 2 O 6 were obtained by XRD diffractometer and FTIR spectroscopy. The X-ray diffraction data revealed the triclinic structure of NiV 2 O 6 with space group P-1 and lattice parameters: a = 7.162 Å, b = 8.816 Å, c = 4.789 Å, and axial angles α = 90.13°, β = 93.78°, and γ = 101.72°. The temperature-dependent electrical resistivity of NiV 2 O 6 was measured by two-probe method which ensured the semiconducting nature of this phase. The electronic and optical properties were investigated by impedance analyzer and UV-Visible spectrophotometer. The calculated optical band gap of NiV 2 O 6 is found to be 2.38 eV.