Investigation of GdBaCo2\_xFexO6-delta (x=0, 0.2)-Ce0.8Sm0.2O2 composite cathodes for intermediate temperature solid oxide fuel cells / Tsvetkova N. S.,Zuev A. Yu.,Tsvetkov D. S. // JOURNAL OF POWER SOURCES. - 2013. - V. 243, l. . - P. 403-408.

ISSN/EISSN:

0378-7753 / 1873-2755

Type:

Article

Abstract:

The double perovskites GdBaCo2,Fe(5)06\_6 (x = 0, 0.2) and composites (100 y) GdBaCo2,Fe506 \_o (X = 0, 0.2) y ceossm0.202 (y = 10-50 wt.\%) were investigated as cathode materials for intermediate temperature solid oxide fuel cells (IT SOFCs). Chemical compatibility of GdBaCo2\_xFex06\_,5 (x = 0, 0.2) with solid electrolyte Ce(0.85)m(0.202), thermal expansion, DC conductivity and electrochemical performance of (100 y) GdBaCo2,Fe(50)6\_,5 (x = 0, 0.2) y Ce0.85m(0),202 (y = 10-50 wt.\%) were studied. Partial substitution of Fe for Co was shown to lead to decrease of double perovskite GdBaCo2\_5Fe505. with the solid electrolyte Ce(08)Sm(0.2)02. Polarization resistance of cathodes studied was found to depend significantly on firing temperature. Variation of solid electrolyte content in (100 y) GdBaCo2\_5Fe506\_6 (x = 0, 0.2) y Ce0.85m0,202 (y = 10-50 wt.\%) composites was shown to allow to optimize their electrochemical performance. Cathode materials of 80 wt.\% GdBaCo206\_,5 20 wt.\% Ce(0,85)m0(20)2 and 65 wt.\% GdBaCoisFe(0206),, 3(5) wt.\% Ce(0.85)m(02)O(2) 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. (C) 2013 Elsevier B.V. All rights reserved.

Author keywords:

IT-SOFC; Polarization resistance; Double perovskite; Composite cathode; Thermal expansion; Total conductivity GDBACO2O5+X LAYERED PEROVSKITE; ELECTROCHEMICAL PROPERTIES; POTENTIAL CATHODE; PERFORMANCE

DOI:

10.1016/j.jpowsour.2013.06.036

Web of Science ID:

ISI:000324846200054

Соавторы в МНС:

Другие поля

Поле	Значение
Month	DEC 1
Publisher	ELSEVIER SCIENCE BV
Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language	English
EISSN	1873-2755
Keywords-Plus	GDBACO2O5+X LAYERED PEROVSKITE; ELECTROCHEMICAL PROPERTIES; POTENTIAL CATHODE; PERFORMANCE
Research-Areas	Chemistry; Electrochemistry; Energy \& Fuels; Materials Science
Web-of-Science-Categories	Chemistry, Physical; Electrochemistry; Energy \& Fuels; Materials Science, Multidisciplinary
Author-Email	Dmitrii.Tsvetkov@usu.ru
ResearcherID-Numbers	Zuev, Andrey/E-6220-2014 Tsvetkov, Dmitry/N-2491-2016
Funding-Acknowledgement	Russian Foundation for Basic Research {[}12-03-91663-ERA\_a]
Funding-Text	This work was supported by the Russian Foundation for Basic Research grant No. 12-03-91663-ERA\_a.
Number-of-Cited-References	29
Usage-Count-Since-2013	40
Journal-ISO	J. Power Sources
Doc-Delivery-Number	223XQ