Fabrication of supported Ca-doped lanthanum niobate electrolyte layer and NiO containing anode functional layer by electrophoretic deposition

• Published in: Solid state ionics Vol. 213; pp. 98 - 102
• Main Authors: Bozza, Francesco, Bonanos, Nikolaos
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 16-04-2012
• Subjects: Acetylacetone; Anode functional layer; Ca-doped LaNbO4; Deposition; Electrodes; Electrolyte thick film; Electrolytes; Electrophoretic deposition; Lanthanum; Niobates; Sintering (powder metallurgy); Solid oxide fuel cells; Anode functional layer; Solid oxide fuel cells; Electrolyte thick film; Ca-doped LaNbO4; Electrophoretic deposition
• ISSN: 0167-2738; 1872-7689
• DOI: 10.1016/j.ssi.2011.05.017

The technique of electrophoretic deposition (EPD) has been applied for the preparation of a dense calcium-doped lanthanum niobate electrolyte film. La0.995Ca0.005NbO4 (LCN) powder was suspended in a solution of acetylacetone, iodine and water. The effects of suspension composition and deposition conditions were analyzed in order to identify a suitable set of EPD process parameters. The powders were deposited on a composite substrate of LCN, NiO, binder and graphite. A dense 8μm film of lanthanum niobate supported on a porous substrate was obtained after sintering at 1200°C. The technique was found to be effective also for the deposition of a mixture of NiO and LCN powders which, after sintering, would form LCN/NiO anode functional layer. Electrochemical characterization of the supported LCN film was performed by applying a LCN/NiO counter electrode.
► Dense Ca-doped LaNbO4 thick film as electrolyte layer for PCFCs prepared by EPD technique. ► Optimization of EPD conditions. ► Porous Ca-doped LaNbO4/NiO anode layer prepared by EPD technique. ► EIS characterization of a quasi symmetrical cell.