Abstract
Various oxides were investigated as a ceramic anode of solid oxide fuel cells (SOFCs) using -based oxide electrolyte. It was found that the cell using Sr-doped for anode exhibits a fairly large power density among the examined oxides for anode. Because the anodic overpotential as well as the electrical resistance decreased, the power density of the cell increased with increasing the amount of Sr doped for La site in , and the highest power density of the cell was obtained by using for anode. On this cell, the maximum power density was achieved to a value of 0.64 and at 1273 and , respectively. After exposure of the cell to air at for , almost the same power density was recovered by changing air to . X-ray diffraction measurement suggests that the perovskite phase of anode partially decomposed into , , and after the power generation measurement; however, small power density can only be achieved on the cell using , , , and for anode. Therefore, perovskite phase doped with Sr is active as the anode of SOFCs, which is highly tolerant against oxidation.
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