A newly developed perovskite series was investigated for performance as SOFC anodes. Sm(0.95)sCe(0.05)Fe(1-x)Co(x)O(3-δ) (x=0-0,05) single phase perovskite oxides were synthesized through a sol gel method. AC and DC measurements were carried out on three-electrode button cells in order to investigate the effect of Co doping on reduction stability, coke resistance and electrochemical performance as SOFC anodes. The electrical conductivity under both air and 5%H2/N2 decreases while catalytic activity towards methane oxidation increases as a function of cobalt concentration. Under dry hydrogen fuel, all x=0-0.03 materials showed good performance with Rct values lower than 1 Ωcm2. The fuel cell tests under methane revealed that the x=0.03 perovskite is the most catalytically active while being resistant to coking at low operating temperatures (500 °C).
Performance of newly developed Co doped Sm 0.95Ce0.05FeO 3-δ as SOFC anode materials
2011
11 Seiten, 8 Bilder, 2 Tabellen, 20 Quellen
Conference paper
English
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