Performance of cathode-supported SOFC with Ni 0.5 Cu 0.5 –CGO anode operated in humidified hydrogen and in low-concentration dry methane

A Ni 0.5 Cu 0.5 –CGO (Ce 0.8 Gd 0.2 O 1.9 ) anode in a LSM ((La 0.75 Sr 0.25 ) 0.95 MnO 3 −δ )–CGO cathode-supported SOFC is tested in humidified H 2 (3% H 2 O) and in low concentration of dry methane, respectively. After co-sintering at 1,300 °C, it was found that the A-site-deficient LSM effectively hindered the formation of La 2 Zr 2 O 7 or SrZrO 3 . The OCVs of the cell are as high as 1.132, 1.14, and 1.147 V in humidified H 2 and 1.314, 1.269, and 1.2 V in 14.8% of dry methane at 850, 800 and 750 °C, respectively, indicating that the ScSZ electrolyte film prepared by the present method is dense enough. The corresponding peak power densities are 0.396, 0.287, and 0.19 W cm −2 in humidified H 2 and 0.249, 0.164, and 0.096 W cm −2 in 14.8% of dry methane at 850, 800, and 750 °C, respectively. The prepared cathode-supported SOFC with NiCu–CGO bimetallic anode shows long-term stability when dry methane is used as fuel.