Electrochimica Acta, Vol.154, 244-248, 2015
BaFe0.6Ce0.1Co0.3O3-delta as a high-performance cathode for intermediate-temperature solid oxide fuel cells
The search for cathode materials with high oxygen reduction reactions activity is a key step toward reducing the operation temperature of solid oxide fuel cells. We report a novel perovskite-type BaFe0.6Ce0.1Co0.3O3-delta (BFCC) cathode, which exhibits outstanding activity for oxygen reduction reactions and yields low interfacial resistances, e.g., 0.113 Omega cm(2) at 650 degrees C. The SEM results show that BFCC is chemically, thermally compatible with Ce0.8Sm0.2O2-delta (SDC) at operation temperatures. The tri-layer single cells of Ni-SDC vertical bar SDC vertical bar BFCC are operated from 500 to 650 degrees C with humidified hydrogen (similar to 3% H2O) as fuel and oxygen as oxidant. It shows excellent power densities of 1422mWcm(-2) at 650 degrees C and 1086mWcm(-2) at 600 degrees C. Preliminary results demonstrate that the BFCC is a promising cathode material for reduced-temperature solid oxide fuel cells. (C) 2014 Elsevier Ltd. All rights reserved.
Keywords:Solid oxide fuel cells;Cathode;Oxygen reduction reaction;Barium ferrite compound;Electrochemical performance