A novel cobalt–free La0.5Ba0.5Fe0.95Mo0.05O3– electrode for symmetric solid oxide fuel cell

Cobalt − free perovskite oxide La0.5Ba0.5Fe0.95Mo0.05O3−δ (LBFMo) was investigated as the electrode of symmetric solid oxide fuel cell (S − SOFC) based on 300−um − thick La0.9Sr0.1Ga0.8Mg0.2O3−δ (LSGM) electrolyte. The electrochemical performance of the S − SOFC with LBFMo|LSGM|LBFMo configuration was evaluated using ambient air as oxidant and H2 as fuel. The maximum power density (Pmax) of the S − SOFC achieves as high as 0.96 W cm−2 at 800 °C; meanwhile, the total polarization resistance (Rpt) of the S − SOFC (including the contributions of both cathode and anode) is only ∼0.12 Ω cm2. Impedance spectra analysis indicates the polarization associated with anode plays a more rate − limiting role in the whole electrochemical reaction process of the S − SOFC. In addition, using LBFMo as symmetric electrode, the S − SOFC also exhibits good cell stability. All results indicate that the LBFMo is a very potential candidate for S − SOFC electrode.