Investigation of GdBaCo2-xFexO6-δ (x = 0, 0.2) - Ce0.8Sm0.2O2 composite cathodes for intermediate temperature solid oxide fuel cells / Tsvetkova N.S., Zuev A.Y., Tsvetkov D.S. // Journal of Power Sources. - 2013. - V. 243, l. . - P. 403-408.

ISSN:

03787753

Type:

Article

Abstract:

The double perovskites GdBaCo2-xFexO 6-δ (x = 0, 0.2) and composites (100 - y) GdBaCo 2-xFexO6-δ (x = 0, 0.2) - y Ce 0.8Sm0.2O2 (y = 10-50 wt.%) were investigated as cathode materials for intermediate temperature solid oxide fuel cells (IT-SOFCs). Chemical compatibility of GdBaCo2-xFexO 6-δ (x = 0, 0.2) with solid electrolyte Ce0.8Sm 0.2O2, thermal expansion, DC conductivity and electrochemical performance of (100 - y) GdBaCo2-xFe xO6-δ (x = 0, 0.2) - y Ce0.8Sm 0.2O2 (y = 10-50 wt.%) were studied. Partial substitution of Fe for Co was shown to lead to decrease of double perovskite GdBaCo 2-xFexO6-δ reactivity with the solid electrolyte Ce0.8Sm0.2O2. Polarization resistance of cathodes studied was found to depend significantly on firing temperature. Variation of solid electrolyte content in (100 - y) GdBaCo 2-xFexO6-δ (x = 0, 0.2) - y Ce 0.8Sm0.2O2 (y = 10-50 wt.%) composites was shown to allow to optimize their electrochemical performance. Cathode materials of 80 wt.% GdBaCo2O6-δ - 20 wt.% Ce 0.8Sm0.2O2 and 65 wt.% GdBaCo 1.8Fe0.2O6-δ - 35 wt.% Ce 0.8Sm0.2O2 were found to have the lowest polarization resistances and reasonable values of thermal expansion coefficient (TEC) and, therefore, can be considered as promising cathode materials for IT-SOFCs. © 2013 Elsevier B.V. All rights reserved.

Author keywords:

Composite cathode; Double perovskite; IT-SOFC; Polarization resistance; Thermal expansion; Total conductivity

Index keywords:

Chemical compatibility; Composite cathode; Double perovskites; Electrochemical performance; Intermediate temperature solid oxide fuel cell; IT-SOFCs; Polarization resistances; Thermal expansion coeffi

DOI:

10.1016/j.jpowsour.2013.06.036

Смотреть в Scopus:

https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879858177&doi=10.1016%2fj.jpowsour.2013.06.036&partnerID=40&md5=999f59d9d462e1950b11f74f67821e60

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Link	https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879858177&doi=10.1016%2fj.jpowsour.2013.06.036&partnerID=40&md5=999f59d9d462e1950b11f74f67821e60
Affiliations	Department of Chemistry, Institute of Natural Sciences, Ural Federal University, Lenin Av. 51, 620000 Ekaterinburg, Russian Federation
Author Keywords	Composite cathode; Double perovskite; IT-SOFC; Polarization resistance; Thermal expansion; Total conductivity
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Correspondence Address	Tsvetkov, D.S.; Department of Chemistry, Institute of Natural Sciences, Ural Federal University, Lenin Av. 51, 620000 Ekaterinburg, Russian Federation; email: Dmitrii.Tsvetkov@usu.ru
CODEN	JPSOD
Language of Original Document	English
Abbreviated Source Title	J Power Sources
Source	Scopus