Gadolinia-Doped Ceria Cathode Interlayer for Low Temperature Solid Oxide Fuel Cell

Abstract

This paper reports the fabrication and investigation of gadolinia-doped ceria (GDC) cathode interlayer on solid oxide fuel cell performance. About 60nm of GDC layer was deposited on the cathode side of 100µm-thick polycrystalline 8mol% yttria-stabilized zirconia (YSZ) substrates, upon which porous platinum electrodes were employed to fabricate the fuel cell element. Current-voltage (I-V) behavior was compared with a YSZ-only control cell. Cathode interface impedances were obtained from electrochemical impedance spectroscopy in the temperature range of 400-450oC. Due to reduced cathode interface resistance of the interlayered cell structure, fuel cell performance was enhanced when compared to that of YSZ-only control cell.