Structural, Optical, Electrical, and Electrochemical properties of ZnMoO4 microspheres synthesized by the twin crystal method

Abstract

A mixed metal oxide, ZnMoO4 has been prepared by the conventional solid-state reaction method, with the help of hydrothermally synthesized solvents of ZnO and MoO3. The phase purity and surface morphology of the precursors of ZnO and MoO3 are resolved with the Rietveld refinement and scanning electronic microscopy studies. Structural, morphological, and vibrational modes characterizations associated with the unit cell information of ZnMoO4 are explained by Rietveld's refined technique of XRD, SEM, and Raman studies, respectively. The anode solvent ZnMoO4 is subjected to cyclic voltammetry analysis. Hence, the electrochemical impedance spectroscopy (EIS) measurements are recorded between 3.0 and 0.01 V at a scan rate of 0.5 mV s−1 for ZnMoO4 electrodes as an anode material in LIBs. Here, it has been noticed that the hexagonal-like ZnMoO4 has high capacity and reasonable cycle stability compared with ordinary ZnMoO4. An anomalous change in permittivity and tangent loss at Tθ =750K in temperature dependent dielectric studies confirm phase transition due to the transformation of molecular groups, MoO4 (low temperature) triclinic phase into molecular groups, MoO6 (high temperature) monoclinic phase. The temperature and frequency dependent AC-conductivity at different intervals reveal mechanisms associated with different temperature regions. This study provides an in-depth understanding of the electrical and electrochemical activities of zinc molybdate anode materials in novel applications.