Abstract
Sm 0.1Ce 0.9O 1.95 (SDC) and La 0.6Sr 0.4Co 0.2Fe 0.8O 3 (LSCF) were synthesized by a glycine–nitrate process. A composite LSCF–SDC–Ag cathode was prepared and its structure was analyzed by X-ray diffraction. No chemical reactions among LSCF, SDC, and Ag in the composite cathode were found. The composite cathode was applied onto SDC electrolyte and the microstructure of the electrolyte–electrode interface was examined by SEM. The overpotential of the interface was measured. A single SOFC was prepared by using LSCF–SDC–Ag as cathode, SDC as electrolyte, and Ni–SDC as anode and its performance was measured. Compared to a similar SOFC with LSCF–SDC cathode, it is found that adding Ag in the cathode improved the SOFC performance significantly.
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