Effects of Temperature on Electrical Conductivity Behaviour of Ce(1-x)Ag(x)O2 by Combustion Synthesis Technique

The Challenge in employing Ag in CeO2 for lower temperature (LT) Solid Oxide Fuel cell (SOFC) to increase the conductivity and negligible loss due to temperature. The main draw back in IT-SOFC is high activation energy and stability at lower temperature. As per literature - solid electrolyte based on Cerium oxide (CeO2) has less efficiency, for ameliorating the efficiency and stability at lower temperature doped CeO2 are used. This study presents preparation of Ag doped CeO2 (Ce((1-x))AgxO(2), x = 0.025, 0.05, 0.1) by combustion technique. The prepared materials structure was studied from XRD and it confirm face centered cubic structure with average size of the particle was 20 nm, 16 nm, and 14 nm respectively. The electrical conductivity properties were studied using electrochemical impedance spectroscopy- Activation energy, Conductivity, Dielectric constant (epsilon') and Dielectric loss [tan (delta)] characteristic are obtained for temperature range (190-270)degrees C.