Short Stack Performance Using Lower Temperature GDC-Based SOFC

Recently, the University of Maryland Energy Research Center and Redox Power Systems LLC developed a GDC electrolyte based solid oxide fuel cell (SOFC) for lower temperature operation using conventional ceramic processing. The fabrication process was integrated with tape casting, screen printing, coating, etc., yielding a cell of 10 cm x 10 cm size and an active area of about 80 cm².

Initial results for single cell tests running on hydrogen and air at 650 ^oC included an open circuit voltage (OCV) of 0.85 V and a power of over 48 W at over 80 A. At an operating voltage of 0.7 V, the single cell power was about 35 W. For a two cell short stack, the initial results under similar conditions showed an OCV of 1.5 V and a peak power of more than 70 Watts at 650 ^°C.