Abstract
The performance of the direct carbon solid oxide fuel cell (DC-SOFC) with various solid oxide electrolytes: 8 mol% Y 2O 3 in ZrO 2 (8YSZ), 9 mol% Sc 2O 3 in ZrO 2 (9ScSZ) and 10 mol% Gd 2O 3 in CeO 2 (20GDC) were examined in temperature range 600–880 °C. The highest current densities were obtained for DC-SOFC with 20GDC electrolyte. It was shown that the DC-SOFC performance improved when thickness of the electrolyte was reduced, which can be attributed to the decrease of ohmic polarisation. The performance of DC-SOFC was also improved for a composite fuel consisted of powdered carbon fuel and 8YSZ or 20GDC ionic oxide electrolyte in the amount of ca. 10 wt.%. Catalytic effects of Ag and Ni particles addition to the carbon fuel on the DC-SOFC operation were also investigated.
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