Evaluation of transport properties of superionic materials in the system (Cu1−xAgxI)–(Ag2O)–(CrO3)

In the present report, an intensive evaluation of transport properties of superionic materials in a pseudoternary system (Cu1-xAgxI)–(Ag2O)–(CrO3), where 0.05≤x≤0.25, has been described. Room temperature conductivity studies have shown the formation of solid electrolytes with electrical conductivities of the order of 10−4 to 10−3 S cm−1 at 295 K. The observed temperature-dependent electrical conductivity behavior is similar to that of conventional solid electrolytes. Impedance and modulus analyses have indicated the temperature-independent distribution of relaxation times and the non-Debye behavior of these materials. The values of silver ionic transport number (tAg+) obtained by EMF technique are nearly equal to the corresponding ionic transport number (ti) values estimated from the Wagnerʹs polarization method, thus suggesting the formation of silver ion-conducting solid electrolytes in the chosen system. The present thermoelectric power (TEP) data are found to confirm the formation of silver ion-conducting glassy electrolytes in this system.