Direct EPD of YSZ electrolyte film onto porous NiO-YSZ composite substrate for reduced-temperature operating anode-supported SOFC

Electrophoretic deposition (EPD) was used for the fabrication of anode-supported yttria-stabilized zirconia (YSZ) electrolyte films. For the EPD, thin layers of graphite were pre-coated on the surface of a nonconducting porous NiO-YSZ composite anode substrate. Uniform YSZ green films were formed on the reverse sides, which did not have the graphite layers. The specimens were transformed into dense bodies; 5 to 10 mm thick after being co-fired with the substrates. The cell performance of the; 5 mm thick dense YSZ films supported on the anode substrates was tested using a La( Sr) Co( Fe) O-3 cathode. Maximum output power densities of similar to 0.19, similar to 0.61, and similar to 1.02 W/cm(2) were attained at 600, 700, and 800 degrees C, respectively. (C) 2004 The Electrochemical Society.