Application of Electrophoretic Deposition Technique to Solid Oxide Fuel Cells

Abstract

The technological feasibility of applying electrophoretic deposition to solid oxide fuel cells was investigated by making small tubular cathode substrates and cathode/electrolyte/anode multilayers. A small tube made of LaxMnO3±d(LM), (La0.7Sr0.3)0.9MnO3±d, or (La0.85Sr0.15)0.95MnO3±d was obtained by depositing lanthanum manganite on graphite substrate from an iodine added acetone bath or an isopropanol bath. The graphite was oxidized and removed during sintering, resulting in a tubular LM with one end closed. A multilayer consisting of porous LM/dense YSZ/porous NiO-YSZ was obtained by deposition of yttria-stabilized zirconia on presintered LM and subsequent codeposition of NiCO3 powder and YSZ powder on the YSZ-deposited LM. Finally, this LM(presintered)/YSZ(as-deposited)/NiCO3-YSZ(as-deposited) layer was cofired.