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

Published online by Cambridge University Press:  17 October 2018

Jeffrey C. De Vero Open the ORCID record for Jeffrey C. De Vero [Opens in a new window] ,
Harumi Yokokawa ,
Katherine Develos-Bagarinao ,
Shu-Sheng Liu ,
Haruo Kishimoto ,
Tomohiro Ishiyama ,
Katsuhiko Yamaji  and
Teruhisa Horita
Jeffrey C. De Vero*
Affiliation:
Energy Conversion Technology Group, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8565, Japan
Harumi Yokokawa
Affiliation:
Energy Conversion Technology Group, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8565, Japan Institute of Industrial Science, The University of Tokyo, Tokyo 153-8505, Japan
Katherine Develos-Bagarinao
Affiliation:
Energy Conversion Technology Group, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8565, Japan
Shu-Sheng Liu
Affiliation:
Energy Conversion Technology Group, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8565, Japan
Haruo Kishimoto
Affiliation:
Energy Conversion Technology Group, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8565, Japan
Tomohiro Ishiyama
Affiliation:
Energy Conversion Technology Group, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8565, Japan
Katsuhiko Yamaji
Affiliation:
Energy Conversion Technology Group, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8565, Japan
Teruhisa Horita
Affiliation:
Energy Conversion Technology Group, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8565, Japan
*
Address all correspondence to Jeffrey C. De Vero at [email protected]
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Abstract

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.

Type
Research Letters
Information
MRS Communications , Volume 9 , Issue 1 , March 2019 , pp. 236 - 244
Copyright
Copyright © Materials Research Society 2018 

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