Characterization of Ba0.5Sr0.5Co0.7In0.1Fe0.2O3-δ as the Cathode Material for Proton-conducting SOFCs

Ba0.5Sr0.5Co0.7In0.1Fe0.2O3-δ powders are successfully synthesized as the cathode materials for proton-conducting solid oxide fuel cells (SOFCs). The prepared cells consisting of the structure of a BaZr0.1Ce0.7Y0.2O3-δ (BZCY7)-NiO anode substrate, a BZCY7 electrolyte membrane and a cathode layer, are measured from 600 to 700 °C with humidified hydrogen (ca. 3% H2O) as the fuel. The electrochemical results show that the cell exhibits a high power density which could obtain an open-circuit potential of 0.986 V and a maximum power density of 400.84 mW cm-2 at 700 °C. The polarization resistance measured at the open-circuit condition is only 0.15 Ω cm2 at 700 °C.