GDC-Based Low-Temperature SOFCs Powered by Hydrocarbon Fuels

The critical issues facing the development of economically competitive solid oxide fuel cell (SOFC) systems include lowering the operation temperature and creating novel anode materials and microstructures capable of efficiently utilizing hydrocarbon fuels. In this paper, we report our recent progress in developing more efficient anodes for direct utilization of methane and propane in low-temperature SOFCs. Anode-supported SOFCs with an electrolyte of 20 μm thick Gd-doped ceria (GDC) were fabricated by copressing, and both Ni- and Cu-based anodes were prepared by a solution impregnation process. Results indicate that both microstructure and composition of the anodes, as fabricated using a solution impregnation technique, greatly influence fuel cell performance. At 600°C, SOFCs fueled with humidified methane, and propane reach peak power densities of 602, 519, and 433 mW/cm 2 , respectively. © 2004 The Electrochemical Society. All rights reserved.