Preparation of thin bilayer coatings based on lanthanum,nickel, and cerium mixed oxides by electrophoretic deposition |
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Authors: | E. G. Kalinina E. Yu. Pikalova A. P. Safronov |
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Affiliation: | 1.Institute of Electrophysics, Ural Branch,Russian Academy of Sciences,Yekaterinburg,Russia;2.Ural Federal University,Yekaterinburg,Russia;3.Institute of High-Temperature Electrochemistry, Ural Branch,Russian Academy of Sciences,Yekaterinburg,Russia |
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Abstract: | This paper examines the feasibility of using electrophoretic deposition for producing thin films of cathode materials based on lanthanum nickel oxides (with the lanthanum nickelate La2NiO4 + δ (LNO) as the predominant phase). We have determined the particle size and zeta potential of nonaqueous suspensions of LNO micro- and nanopowders prepared by solid-state reactions, pyrolysis of liquid precursors, and laser evaporation of a target. Using ultrasonic processing, we have obtained stable LNO nanopowder suspensions in acetylacetone and an isopropanol + acetylacetone mixture, which have zeta potentials of +25 and + 38 mV, respectively. Electrophoretic deposition on a dense model cathode has produced thin bilayer coatings from electrode and electrolyte materials (LNO and Се0.8(Sm0.75Sr0.2Ba0.05)0.2O2–δ), which are of interest for solid oxide fuel cell technology. |
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