GdBaCo2O5 + x cathode for anode-supported ceria SOFCs
Abstract The single-phase GdBaCo 2 O 5 +  x (GBCO) and GBCO–Gd 0.2 Ce 0.8 O 1.9 (GDC) composites (10, 30 wt.%) were tested as a cathode material on the anode-supported SOFCs. The cathodes were screen printed on ∼ 20 μm-thick GDC electrolyte that was supported on ∼ 1 mm-thick Ni–GDC anode. The maximum power density ( P max ) of 0.56 W cm − 2 was obtained for the cells with single-phase GBCO cathode at 600 °C under air / 97% H 2  + 3% H 2 O gradient. P max decreased to 0.44 and 0.20 W cm − 2 when 10 wt.% and 30 wt.%, respectively, of GDCs were added into GBCO cathodes.