Abstract
A Ni0.5Cu0.5–CGO (Ce0.8Gd0.2O1.9) anode in a LSM ((La0.75Sr0.25)0.95MnO3−δ )–CGO cathode-supported SOFC is tested in humidified H2 (3% H2O) 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 La2Zr2O7 or SrZrO3. The OCVs of the cell are as high as 1.132, 1.14, and 1.147 V in humidified H2 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 H2 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.
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