Enhanced Ionic Conductivity of Co-doped Ceria-Carbonate Nano Composite Electrolyte Material for LT-SOFCs

摘要

Co-doped ceria Ce_(0.8)Sm_(0.1)Y_(0.1)O_(2-δ) and co-doped ceria-carbonate nano composite Ce_(0.8)Sm_(0.1)Y_(0.1)O_(2-δ) - (Na-K)_2CO_3 used as electrolytes in low temperature solid oxide fuel cells (LT-SOFCs) were synthesized. Structural and morphological studies were characterized by XRD and SEM. Electrical conductivity measurements were carried out by using Impedance Spectroscopy in the temperature range of 100 to 500~oC. It was observed that the co-doped ceria-carbonate Nano composite material exhibited high ionic conductivity than that of co-doped ceria making it useful as promising electrolyte material for LTSOFCs.