PREPARATION OF BINARY AND TERNARY OXIDES BY MOLTEN SALT METHOD AND ITS ELECTROCHEMICAL PROPERTIES

We report simple binary oxides namely SnO2, TiO2, CuO, MnO2, Fe2O3, Co3O4 and ternary oxides like MnCo2O4 by molten salt method at a temperature range of 280 degrees C to 950 degrees C in air and discuss the effect of morphology, crystal structure and electrochemical properties of binary and ternary oxides. Materials were characterized by X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Brunauer-Emmett- Teller ( BET) surface area methods. XRD patterns showed all MSM prepared materials exhibited characteristic lattice parameter values. BET surface area varies depending on the nature of the material, molten salt and preparation temperature and the obtained values are in the range, 1 to 160 m(2)/g. Electrochemical properties were studied using cyclic voltammetry (CV) and electrochemical performance studies were carried in the voltage range, 0.005-1.0V for SnO2, 1.0-2.8V for TiO2 and Fe2O3, MCo2O4 (M= Co, Mn), MnO2 and CuO were cycled in the range, 0.005-3.0V. At a current rates of 30-100 mA/g and a scan rate of 0.058 mV/sec was used for galvanostatic cycling and cyclic voltammetry. SnO2 showed that an alloying-de-alloying reaction occurs at similar to 0.2 and similar to 0.5 V vs. Li. TiO2 main intercalation and de- interaction reactions at similar to 1.7 and similar to 1.8 V vs. Li. Co3O4, MnCo2O4, and MnO2 main discharge potentials at similar to 1.2, 0.9V and 0.4V, resp. and charge potentials peak similar to 2.0V and 1.5V vs. Li. CuO prepared at 750 degrees C exhibited main anodic peak at similar to 2.45V and cathodic peaks at similar to 0.85V and similar to 1.25V. We discussed the possible reaction mechanisms and Li-storage performance values in detail.