Investigation of fast-ionic transport in the ternary system (Cu1−xAgxI)–(Ag2O)–(V2O5), (0.05≤x≤0.25)

The occurrence of fast-ionic conduction in the ternary system 40(Cu1−xAgxI)–40(Ag2O)–20(V2O5), (0.05≤x≤0.25) has been described. The formation of composite solid electrolyte materials comprising glassy and crystalline phases has been identified by means of X-ray diffraction analysis. Fourier transform infrared spectroscopic studies have confirmed the presence of VO43− and V2O74− groups in these new materials. Detailed thermal characterization of these materials carried out by differential scanning calorimetry has indicated the transition temperature of one of the reaction products viz., AgI. From the conductivity measurements carried out using the complex impedance analysis, the values of room temperature electrical conductivity (σRT) and activation energy for ionic migration in these materials are found to be of the order of 10−2 to 10−4 S cm−1 and 0.22–0.35 eV, respectively. The ionic transport number (ti) measurements made using Wagner’s polarization method and evaluation of silver ionic transport number (tAg+) by galvanic cell method have been used to estimate the extent of contribution of ionic conductivity especially due to silver ionic transport to the total conductivity observed in these materials.