Electrical characterization of superionic materials in the system (Cu1-xAgxI)-(Ag2O)-(P2O5), (0.05 <= x <= 0.25) for solid state batteries

Superionic materials in the system 30(Cu1-xAgxI)-46.66(Ag2O)-23.33(P2O5), w here x = 0.05, 0.1, 0.15, 0.2 and 0.25 respectively, were prepared using th e melt quenching process. The electrical conductivity measurements were mad e in the temperature range 295-445 K by the complex impedance method. The r oom temperature electrical conductivity values observed for five different samples of the system are found to be of the order of 10(-6) to 10(-4) Scm( -1). The best conducting composition was found to exhibit an electrical con ductivity as high as 1.15x10(-4) Scm(-1) at 295 K. From the temperature-dep endent conductivity studies, the values of activation energy of these mater ials are found to be less than 0.5 eV. The ionic transport number (t(i)) va lues for these materials are found to be greater than 0.96. These measureme nts confirm the formation of superionic materials in this system and their suitability for battery applications as solid electrolytes.