Comparative Performance of Anode-Supported SOFCs Using a Thin Ce0.9Gd0.1O1.95 Electrolyte with an Incorporated BaCe0.8Y0.2O3 − α Layer in Hydrogen and Methane

Abstract

Multilayered (GDC∕BCY∕GDC) electrolytes were prepared by tape casting on a anode support. The overall electrolyte thickness ranged from , including a thick BCY layer. When the multilayered electrolyte cell was tested with hydrogen at the anode and air at the cathode in the temperature range of , it yielded open-circuit voltages (OCVs) of , which were higher than the OCVs of obtained for a single-layered GDC electrolyte cell under the same conditions. The corresponding peak power densities reached 273, 731, and at 500, 600, and , respectively. The multilayered electrolyte cell could also be applied to direct methane solid oxide fuel cell (SOFC) and single-chamber SOFC operating in a mixture of methane and air. These SOFCs yielded OCVs of and reasonable power densities without coking.