Influence of microstructure and applied current on the electrical conductivity of SmBaCo2O5+d cathode in solid oxide fuel cell

Generation of nanoflowers and nanoneedles on Co-based layered perovskite of IT-SOFC cathode affecting electrical conductivities

“…The zirconia beads were removed from the slurry and the remaining part was stirred at room temperature to form a cathode ink paste. The specific process can be found in a previously published study by our research group [23][24][25][26][27][28]. The cathode ink was thinly screenprinted on the sintered CGO91 electrolyte substrate using a mesh (23 x 6 mm).…”

Electrical conductivity properties of porous SmBaCo2O5+d and SmBa0.5Sr0.5Co2O5+d layered perovskite oxide systems for solid oxide fuel cell

“…6. It has been reported that in dense layered perovskite cathode samples in which Co is substituted into the perovskite B-site an increase in electrical conductivity can be achieved if a low current is applied [29,30]. However, the porous cathodes display almost the same electrical conductivity values regardless of the applied currents.…”

“…Therefore, in order to compare and evaluate the electrical conductivity of the cathode used in an actual SOFC, a porous microstructural cathode should be used. In this study, SmBaCo2O5+d (SBCO) and SmBa0.5Sr0.5Co2O5+d (SBSCO) layered perovskite oxide systems, which have been reported to show excellent performance [29,30], were fabricated into porous microstructures using screen printing, and their electrical conductivity was measured to compare with the conductivity of dense microstructure samples.…”