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dc.contributor.author
Martinez, Cristian Fabricio

dc.contributor.author
Prado, Fernando Daniel

dc.contributor.author
de Florio, Daniel Zanetti
dc.contributor.author
Caneiro, Alberto

dc.date.available
2019-10-10T14:44:16Z
dc.date.issued
2014-02-01
dc.identifier.citation
Martinez, Cristian Fabricio; Prado, Fernando Daniel; de Florio, Daniel Zanetti; Caneiro, Alberto; Stabilization of the cubic perovskite in the system La1-xBa xCo1-yFeyO3-δ (0.7 ≤ x ≤ 0.9) and its electrochemical performance as cathode materials for intermediate-temperature solid oxide fuel cells; Elsevier Science; Journal of Power Sources; 247; 1-2-2014; 264-272
dc.identifier.issn
0378-7753
dc.identifier.uri
http://hdl.handle.net/11336/85499
dc.description.abstract
The effects of the substitution of Co by Fe on the crystal chemistry and electrode reaction of the system La1-xBaxCo 1-yFeyO3-δ (0.7 ≤ x ≤ 0.9), are investigated. The incorporation of Fe stabilizes the cubic perovskite and suppresses the structural transformation of La1-xBa xCoO3-δ from a metastable cubic perovskite to a hexagonal phase below 900 C. The linear expansion decreases with the replacement of Co by Fe. The lowest expansion coefficient value, α ∼ 20.5 × 10-6 K-1, was obtained for the samples with Fe content y = 0.6. AC impedance spectroscopy measurements on symmetrical cells reveal the presence of an intermediate (IF) and a low (LF) frequency contributions at T ≥ 600 C. The LF arc varies with the pO2, at 700 C, according to a power law with exponent n = -1, indicating oxygen diffusion through the porous of the electrode. The minimum Rp value (0.6 cm2 at 600 C) was obtained for La0.3Ba0.7Co0.6Fe 0.4O3-δ. At constant temperature, T = 750 C, only the IF contribution varies at a rate of 3 × 10-4 cm2 h-1, while the LF contribution remains constant. Experimental data suggest the growth of the IF arc is caused by the mismatch in the expansion coefficients of the electrode and electrolyte.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science

dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
BCFN
dc.subject
IMPEDANCE SPECTROSCOPY
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LBCF
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OXIDE MIXED CONDUCTORS
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PHASE RELATIONSHIP
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THERMAL EXPANSION
dc.subject.classification
Cerámicos

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Ingeniería de los Materiales

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INGENIERÍAS Y TECNOLOGÍAS

dc.title
Stabilization of the cubic perovskite in the system La1-xBa xCo1-yFeyO3-δ (0.7 ≤ x ≤ 0.9) and its electrochemical performance as cathode materials for intermediate-temperature solid oxide fuel cells
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-10-04T17:10:08Z
dc.journal.volume
247
dc.journal.pagination
264-272
dc.journal.pais
Países Bajos

dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Martinez, Cristian Fabricio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Física del Sur. Universidad Nacional del Sur. Departamento de Física. Instituto de Física del Sur; Argentina
dc.description.fil
Fil: Prado, Fernando Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto de Física del Sur. Universidad Nacional del Sur. Departamento de Física. Instituto de Física del Sur; Argentina
dc.description.fil
Fil: de Florio, Daniel Zanetti. Universidade Federal de ABC; Brasil
dc.description.fil
Fil: Caneiro, Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina. Comisión Nacional de Energía Atómica. Gerencia de Área de Aplicaciones de la Tecnología Nuclear. Gerencia de Investigación Aplicada; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina
dc.journal.title
Journal of Power Sources

dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.jpowsour.2013.08.091
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0378775313014419
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