SOFC cathodic layers using wet powder spraying technique with self synthesized nanopowders

In this work, a wet powder spraying method has been investigated as a facile low cost route to deposit electrode layer on SOFC electrolyte support. A particular focus has been examining the interfacial stability of the deposited layers, and determining the influence of the thickness of the different...

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Bibliographic Details
Published in:	International journal of hydrogen energy Vol. 44; no. 14; pp. 7555 - 7563
Main Authors:	Wain-Martin, Aritza, Morán-Ruiz, Aroa, Laguna-Bercero, Miguel Angel, Campana, Roberto, Larrañaga, Aitor, Slater, Peter Raimond, Arriortua, María Isabel
Format:	Journal Article
Language:	English
Published:	Elsevier Ltd 15-03-2019
Subjects:	Active layers Ball milling Cathode SOFC Wet powder spray Active layers Ball milling Wet powder spray Cathode SOFC
Online Access:	Get full text
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Summary:	In this work, a wet powder spraying method has been investigated as a facile low cost route to deposit electrode layer on SOFC electrolyte support. A particular focus has been examining the interfacial stability of the deposited layers, and determining the influence of the thickness of the different layers, as well as the ball milling regime used to produce the electrode inks. The developed system consist of an yttria stabilized zirconia electrolyte support, a La0.6Sr0.4FeO3 (LSF) cathode, a Sm0.2Ce0.8O1.9 (SDC) barrier layer between the electrolyte and the cathode, and LaNi0.6Fe0.4O3 (LNF) as a contact layer, for a future integration with the SOFC interconnector. The electrolyte supports (300 μm thickness and 9 mm diameter) supports were prepared by uniaxial pressing, while the deposition of thin barrier layers, cathode and contact layer were carried out by manual spray coating. •Cathode side symmetric cells have been produced by wet powder spraying.•The effect of the ball milling has been studied and process optimized.•The best EIS results were achieved with thicknesses of 10 μm of LSF and LNF.
ISSN:	0360-3199 1879-3487
DOI:	10.1016/j.ijhydene.2019.01.220