BaFe0.6Co0.3Ce0.1O3-δ as cathode materials for proton-conducting solid oxide fuel cells

Mixed ionic (O2-) and electronic conductor BaFe0.6Co0.3Ce0.1O3-delta,5 (BFCC) has been prepared by the modified Pechini method and studied as cathode materials for proton-conducting solid oxide fuel cells with BaZr0.1Ce0.7Y0.1Yb0.1O3-delta (BZCYYb) as the electrolyte. A new anode-supported SOFC material system Ni-BZCYYbIBZCYYbIBFCC is fabricated via a simple dry pressing/co-firing method. The performance of the button cell is tested and characterized under low temperature range from 550 to 650 degrees C with humified H-2 as fuel, oxygen as oxidant. The fabricated single button cell with about 20-mu m-thick electrolyte exhibits promising performance, with maximum power densities of 451, 362, and 287 mW cm(-2) at 650, 600, and 550 degrees C, respectively. The Nyquist plot of the impedance data at open circuit conditions shows that the overall electrode polarization resistances is 0.15, 0.28, 0.60 Omega cm(2) at 650, 600 and 550 degrees C, respectively. No obvious cell degradation was observed during the 30-h durability test at a constant voltage of 0.5 V at 650 degrees C. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.