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dc.contributor.author
Martinez, Cristian Fabricio
dc.contributor.author
Prado, Fernando Daniel
dc.contributor.author
Caneiro, Alberto
dc.date.available
2018-11-15T20:08:14Z
dc.date.issued
2017-05
dc.identifier.citation
Martinez, Cristian Fabricio; Prado, Fernando Daniel; Caneiro, Alberto; Study of the electrode polarization resistance of cobaltites with high Ba content as cathode for IT-SOFC; Electrochemical Society; Journal of the Electrochemical Society; 164; 7; 5-2017; F759-F767
dc.identifier.issn
0013-4651
dc.identifier.uri
http://hdl.handle.net/11336/64572
dc.description.abstract
The phase relationships and the electrochemical behavior of cobaltites with high content of Ba, such as, La1-xBaxCoO3-δ with x = 0.5, 0.7 and 1.0, Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) and BaCo0.7Fe0.2Nb0.1O3-δ (BCFN), were studied by XRD and impedance spectroscopy varying the electrode configurations from a single porous layer to a graded-cathode using Ce0.9Gd0.1O1.95 (GDC) as electrolyte. Regardless of the electrode material, symmetrical cells with graded-cathodes displayed the lowest polarization resistance (Rp) values. The minimum Rp values were found to be 0.036 and 0.039 Ω cm2 at 600°C, in air, for La0.5Ba0.5CoO3-δ (LBC) and BSCF, respectively. The impedance spectra reveals mainly two processes, one at intermediate frequency (IF) in the range (0.1 ≤ f ≤ 5 × 103 Hz) and another at low frequency (LF) in the range (1 ≤ f ≤ 3 Hz). The variation of the parameter n (obtained from the log(RIF) vs. log(pO2) plots) in relation with the electrode configuration, indicates the rate-limiting process goes from a mixture of the ion transfer at the electrode/electrolyte interface and the charge transfer at the electrode surface to a mixture between this last process and the dissociation of the oxygen molecule.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Electrochemical Society
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
It-Sofc
dc.subject
Cobaltites
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Mixed Conductors Oxides
dc.subject
Electrochemical Impedance Spectroscopy
dc.subject
Cathode
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Química Orgánica
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Ciencias Químicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Study of the electrode polarization resistance of cobaltites with high Ba content as cathode for IT-SOFC
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-10-22T18:03:16Z
dc.journal.volume
164
dc.journal.number
7
dc.journal.pagination
F759-F767
dc.journal.pais
Estados Unidos
dc.journal.ciudad
Philadelphia
dc.description.fil
Fil: Martinez, Cristian Fabricio. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. 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: Caneiro, Alberto. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.journal.title
Journal of the Electrochemical Society
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://jes.ecsdl.org/content/164/7/F759
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1149/2.0681707jes
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