Influence of electrolyte substrates on the Sr-segregation and SrSO4 formation in La0.6Sr0.4Co0.2Fe0.8O3–δ thin films

To systematically investigate the influence of electrolyte substrates on Sr-segregation and SrSO4 formation in (LaSr)(CoFe)O3 (LSCF) cathodes in solid oxide fuel cells, model thin films were grown on Gd-doped ceria (GDC) and on Y-doped BaZrO3 (BZY) electrolytes by pulsed laser deposition and heat tr...

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Bibliographic Details
Published in:MRS communications 2019-03, Vol.9 (1), p.236-244
Main Authors: De Vero, Jeffrey C., Yokokawa, Harumi, Develos-Bagarinao, Katherine, Liu, Shu-Sheng, Kishimoto, Haruo, Ishiyama, Tomohiro, Yamaji, Katsuhiko, Horita, Teruhisa
Format: Article
Language:English
Subjects:
Barium zirconates
Biomaterials
Cerium oxides
Characterization and Evaluation of Materials
Electrolytes
Electrolytic cells
Gadolinium
Heat treatment
Investigations
Lasers
Materials Engineering
Materials Science
Nanotechnology
Poisoning
Polymer Sciences
Pulsed laser deposition
Pulsed lasers
Research Letter
Research Letters
Scanning electron microscopy
Sintering
Solid oxide fuel cells
Strontium sulfate
Substrates
Sulfur content
Thin films
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Summary:To systematically investigate the influence of electrolyte substrates on Sr-segregation and SrSO4 formation in (LaSr)(CoFe)O3 (LSCF) cathodes in solid oxide fuel cells, model thin films were grown on Gd-doped ceria (GDC) and on Y-doped BaZrO3 (BZY) electrolytes by pulsed laser deposition and heat treated at 800–1000 °C in synthetic air with a trace amount of SO2. A severe SrSO4 formation was observed in LSCF on GDC as compared with the BZY, especially at low temperature. The difference in Sr-segregation and SrSO4 formation on the LSCF was discussed in relation to Sr diffusion and related elemental redistribution across the interfaces.
ISSN:2159-6859
2159-6867
DOI:10.1557/mrc.2018.208