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SOFCs fed with dry H 2  and CH 4  fuels were examined using 20 wt% Ni/SDC and 0.2 wt% BaO-added 20 wt% Ni/SDC [Ni(BaO)/SDC] anodes. The i–v characteristics of the cells in H 2  and CH 4  resulted in a higher output produced by CH 4  fuel compared to that produced by H 2  fuel in both anodes. In both fuels, better anode characteristics were obtained for Ni(BaO)/SDC. Consequently, the anodic performance was in the order of Ni(BaO)/SDC in CH 4  &amp;gt; Ni/SDC in CH 4  &amp;gt; Ni(BaO)/SDC in H 2  &amp;gt; Ni/SDC in H 2 . A significant carbon deposition was observed in the Ni/SDC anode in CH 4 , but the carbon deposition observed in Ni(BaO)/SDC was less. From the DC electrical resistance measurement of the anode films, a remarkable decrease in resistance was observed in Ni/SDC due to the carbon deposition after CH 4  exposure. The resistance of Ni(BaO)/SDC was higher than that of Ni/SDC and did not change even after CH 4  exposure because of the less carbon deposit. The high dispersibility of Ni particles was confirmed in both anodes and was particularly remarkable in Ni(BaO)/SDC. The highest anodic performance in Ni(BaO)/SDC was attributed to the high Ni dispersibility which might promote CH 4  decomposition by producing less carbon deposit. It was speculated that the higher cell output in CH 4  than that in H 2  is due to the locally high concentration of H 2  and/or CO gas on the anode surface by the promotion of CH 4  decomposition.

Anodic Performance of BaO-Added Ni/SDC for Solid Oxide Fuel Cell Fed With Dry CH4