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dc.contributor.author
Baque, Laura Cecilia
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dc.contributor.author
Jørgensen, Peter Stanley
dc.contributor.author
Zhang, Wei
dc.contributor.author
Hansen, Karin Vels
dc.contributor.author
Søgaard, Martin
dc.date.available
2016-05-17T15:32:34Z
dc.date.issued
2015-06-12
dc.identifier.citation
Baque, Laura Cecilia; Jørgensen, Peter Stanley; Zhang, Wei; Hansen, Karin Vels ; Søgaard, Martin; Effect of Aging on the Electrochemical Performance of LSM-YSZ Cathodes; Electrochemical Society; Journal of the Electrochemical Society; 162; 9; 12-6-2015; 971-981
dc.identifier.issn
0013-4651
dc.identifier.uri
http://hdl.handle.net/11336/5711
dc.description.abstract
Investigations of degradation mechanisms of solid oxide fuel cells are crucial for achieving a widespread commercialization of the technology. In this work, electrochemical impedance spectroscopy (EIS) was applied for studying the aging effect on LSM-YSZ cathodes exposed to humidified air at 900°C for up to 3000 h. EIS spectra were fitted by a transmission line model for estimating relevant parameters associated with the LSM/YSZ charge transfer reaction and the oxide ion conduction through the YSZ network. For the reference non-aged sample, the ionic conductivity values are the expected ones for YSZ with 1 eV activation energy and no dependency on oxygen partial pressure (pO2), while the charge transfer resistance presents an activation energy of 1.6 eV and is proportional to (pO2)−0.31±0.08. These values agree with those reported in literature, validating the used model. The charge transfer resistance shows no clear tendency with aging time, while the ionic conductivity decreases up to ∼79%. Accordingly, the electrochemically active thickness contracts from 60–135 μm to 45–60 μm. The changes observed in the cathode transport and electrochemical properties are mostly explained by the evolution of the phases present in agreement with results previously reported in the literature.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Electrochemical Society
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Composite Cathodes
dc.subject
Degradation
dc.subject
Sofc
dc.subject.classification
Ingeniería de los Materiales
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dc.subject.classification
Ingeniería de los Materiales
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dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
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dc.title
Effect of Aging on the Electrochemical Performance of LSM-YSZ Cathodes
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2015-11-03T14:13:25Z
dc.journal.volume
162
dc.journal.number
9
dc.journal.pagination
971-981
dc.journal.pais
Estados Unidos
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dc.journal.ciudad
Nueva Jersey
dc.description.fil
Fil: Baque, Laura Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Patagonia Norte. Instituto de Investigación y Desarrollo en Ingeniería de Procesos, Biotecnología y Energías Alternativas; Argentina. Technical University of Denmark. Department of Energy Conversion and Storage; Dinamarca
dc.description.fil
Fil: Jørgensen, Peter Stanley. Technical University of Denmark. Department of Energy Conversion and Storage; Dinamarca
dc.description.fil
Fil: Zhang, Wei. Technical University of Denmark. Department of Energy Conversion and Storage; Dinamarca
dc.description.fil
Fil: Hansen, Karin Vels . Technical University of Denmark. Department of Energy Conversion and Storage; Dinamarca
dc.description.fil
Fil: Søgaard, Martin. Technical University of Denmark. Department of Energy Conversion and Storage; Dinamarca
dc.journal.title
Journal of the Electrochemical Society
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://jes.ecsdl.org/content/162/9/F971
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1149/2.0181509jes
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/10.1149/2.0181509jes
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