Abstract
We fabricated single cells with a cathode consisting of a LaNi 0.6 Fe 0.4 O₃-Ce 0.8 Sm 0.2 O 1.9 composite (LNF-S20DC composite) active layer and an LNF current collecting layer on a 0.89ZrO₂-0.10Sc₂O₃ -0.01Al₂O₃ electrolyte sheet. The cathode layers were prepared by the screen-printing method. The cathode properties of these cells were measured by the AC impedance method at 800℃. The cathodes with the ceria-LNF composite active layer exhibited high power performance prior to current loading. We investigated the influence of the mixture ratio of LNF and S20DC on the cathodes properties. The Sm in the ceria particles of the composite cathode was substituted with other rare-earth elements. Cathodes with Pr and Gd co-doped ceria in the active layer provided the better performance than those with Sm- or Gd-doped ceria.
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