Cobalt free SrFe0.95Nb0.05O3-δ cathode material for proton-conducting solid oxide fuel cells with BaZr0.1Ce0.7Y0.2O3-δ electrolyte

A novel cobalt-free cubic perovskite SrFe0.95Nb0.05O3-delta (SFNb) was synthesized and investigated as cathode for proton-conducting solid state fuel cell (H-SOFC) with BaZr0.1Ce0.7Y0.2O3-delta (BZCY) as the electrolyte. Anode supported NiO-BZCY/BZCY/SFNb cell was fabricated and the performance was investigated. A peak power density of 538 mW cm(-2) and a low polarization resistance of 0.23 Omega cm(2) were obtained at 650 degrees C with hydrogen as the fuel and air as the oxidant. No obvious cell degradation was observed during the 50 h test. All the results indicated that the cobalt-free SFNb oxide is a promising cathode material for H-SOFCs. (C) 2017 Published by Elsevier B.V.