Abstract
Anode-supported solid oxide fuel cells (SOFCs) with a bilayered yttria-doped bismuth (YDB) and gadolinia-doped ceria (GDC) composite electrolyte film were developed. The cell with an YDB∕GDC composite electrolyte film showed an increase of in open-circuit voltage in the operating temperature range of , compared with that with a single GDC electrolyte film . Using Pt as the cathode, the cell with the YDB∕GDC composite electrolyte also showed much lower electrode polarization resistance than that with the single GDC electrolyte and almost the same ohmic resistance as the latter. As a result of the combined effects of these factors, the cell with an YDB∕GDC composite electrolyte can achieve times higher maximum power density than that with a single GDC electrolyte in the operating temperature range of .
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