Electrochemical characterization of cobalt infiltrated La0.6Sr0.4Co0.2Fe0.8O3-δcathodes of IT-SOFCs

Nano-sized cobalt oxide decorated La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) cathode was investigated as apromising cathode for intermediate temperature solid oxide fuel cells (IT-SOFC). To characterizethe polarization resistance (Rp) of the infiltrated and non-infiltrated cathodes, an equivalentcircuit was fitted onto the electrochemical impedance spectroscopy (EIS) data. Compared to pureLSCF, the high frequency polarization resistance decreased significantly as much as 87% at 600°C by presence of cobalt oxide nano-particles.

Keywords:

IT-SOFC , Electrochemical Impedance Spectroscopy , Cobalt oxide nano-particle , LSCF