Three lanthanum-based perovskite ceramic compounds as contact materials, (La 0.8 Sr 0.2) 0.95 Fe 0.6 Mn 0.3 Co 0.1 O 3 (LSFMC), LaNi 0.6 Fe 0.4 O 3- (LNF) and LaNi 0.6 Co 0.4 O 3- (LNC), were coated on Crofer22APU interconnect and then, La 0.6 Sr 0.4 FeO 3 (LSF) cathode was deposited on each of contact layers, using in both contact coating is applied between Crofer22APU and LSF cathode without compromising the contact resistance of the system.

Available online xxxKeywords: SOFC Wet powder spray Cathode Active layers Ball milling a b s t r a c t sIn 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 La 0.6 Sr 0.4 FeO 3 (LSF) cathode, a Sm 0.2 Ce 0.8 O 1.9 (SDC) barrier layer between the electrolyte and the cathode, and LaNi 0.6 Fe 0.4 O 3 (LNF) as a contact layer, for a future integration with the SOFC interconnector. The electrolyte supports (300 mm 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.Please cite this article as: Wain-Martin A et al., SOFC cathodic layers using wet powder spraying technique with self synthesized nanopowders, International Journal of Hydrogen Energy, https://doi.

In order to simulate the contact situation of interconnect/contact layer/cathode in SOFC stacks, contact resistance and chemical compatibility of LaNi0.6Co0.4O3–δ (LNC) as contact layer between Crofer22APU interconnect and La0.6Sr0.4FeO3 (LSF) cathode was investigated at 800 °C in air for more than 1300 h using X‐ray diffraction (XRD), scanning electron microscopy (SEM) set‐up equipped with an energy dispersive X‐ray analyser (EDX) and area specific resistance (ASR) measurements. The XRD analysis reveals that multiple phases were formed during ASR test. The point microanalysis on cross‐section of Fe–Cr/LNC/LSF system, after ASR measurements, shows chromium within the porous contact material mainly concentrated close to interconnect, but no Cr, Ni, or Co was detected in the cathode. It was found between LNC and LSF cathode, a thin and uniform layer which contains Sr, La, Cr, Co, Ni, and Fe. The contact between layers could act as a physical barrier for element migration and thus can suppress degradation of the cathode for these systems. The area specific resistance slope depends on the interactions between the contact material and/or cathode and the interconnect. Co‐containing spinels formed during ASR test can be responsible of the resistance decrease of the system, related to the low degradation of the cell.

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