The Soft Chemical Route Improving IT-SOFC Cathode Performance: The Lanthanum Barium Cobaltite Case

Autores
Garcés, Diana Andrea; Mogni, Liliana Verónica
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In this work we studied the oxygen reduction mechanism in three cathodes: cubic La0.5Ba0.5CoO3-δ obtained by Solid State Reaction (SSR) in air at 1100 ºC; a phase with cationic order, laminar structure and tetragonal symmetry, LaBaCo2O6-δ, was obtained by SSR under inert gas at 1150 ºC. An intermediate compound with the same nominal composition was obtained at lower temperature by a soft chemical route involving a sol-gel process. Despite that the crystal structures of the oxides obtained by SSR are different, their microstructures are similar but quite different to that obtained by the soft chemical route. The area specific resistance (ASR) as a function of pO2 was studied at 700 °C by Electrochemical Impedance Spectroscopy (EIS). We found that both, crystal structure and microstructure affect strongly the ASR. Whereas cubic perovskite showed lower ASR than tetragonal, the ASR of the oxide obtained by the chemical route decreased almost one order of magnitude at higher pO2, respect to that obtained by conventional SSR.
Fil: Garcés, Diana Andrea. Comisión Nacional de Energía Atómica. Gerencia de Area de Aplicaciones de la Tecnología Nuclear. Gerencia de Investigación Aplicada; Argentina
Fil: Mogni, Liliana Verónica. Comisión Nacional de Energía Atómica. Gerencia de Area de Aplicaciones de la Tecnología Nuclear. Gerencia de Investigación Aplicada; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Materia
La0.5ba0.5coo3-Δ
Labaco2o6-Δ
Cathode
Sofc
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/17664
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/17664
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling The Soft Chemical Route Improving IT-SOFC Cathode Performance: The Lanthanum Barium Cobaltite CaseGarcés, Diana AndreaMogni, Liliana VerónicaLa0.5ba0.5coo3-ΔLabaco2o6-ΔCathodeSofchttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2In this work we studied the oxygen reduction mechanism in three cathodes: cubic La0.5Ba0.5CoO3-δ obtained by Solid State Reaction (SSR) in air at 1100 ºC; a phase with cationic order, laminar structure and tetragonal symmetry, LaBaCo2O6-δ, was obtained by SSR under inert gas at 1150 ºC. An intermediate compound with the same nominal composition was obtained at lower temperature by a soft chemical route involving a sol-gel process. Despite that the crystal structures of the oxides obtained by SSR are different, their microstructures are similar but quite different to that obtained by the soft chemical route. The area specific resistance (ASR) as a function of pO2 was studied at 700 °C by Electrochemical Impedance Spectroscopy (EIS). We found that both, crystal structure and microstructure affect strongly the ASR. Whereas cubic perovskite showed lower ASR than tetragonal, the ASR of the oxide obtained by the chemical route decreased almost one order of magnitude at higher pO2, respect to that obtained by conventional SSR.Fil: Garcés, Diana Andrea. Comisión Nacional de Energía Atómica. Gerencia de Area de Aplicaciones de la Tecnología Nuclear. Gerencia de Investigación Aplicada; ArgentinaFil: Mogni, Liliana Verónica. Comisión Nacional de Energía Atómica. Gerencia de Area de Aplicaciones de la Tecnología Nuclear. Gerencia de Investigación Aplicada; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaElectrochemical Society2013-10info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/17664Garcés, Diana Andrea; Mogni, Liliana Verónica; The Soft Chemical Route Improving IT-SOFC Cathode Performance: The Lanthanum Barium Cobaltite Case; Electrochemical Society; ECS Transactions; 58; 2; 10-2013; 191-1981938-5862enginfo:eu-repo/semantics/altIdentifier/url/http://ecst.ecsdl.org/content/58/2/191.abstractinfo:eu-repo/semantics/altIdentifier/doi/10.1149/05802.0191ecstinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:44:17Zoai:ri.conicet.gov.ar:11336/17664instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:44:17.997CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The Soft Chemical Route Improving IT-SOFC Cathode Performance: The Lanthanum Barium Cobaltite Case
title The Soft Chemical Route Improving IT-SOFC Cathode Performance: The Lanthanum Barium Cobaltite Case
spellingShingle The Soft Chemical Route Improving IT-SOFC Cathode Performance: The Lanthanum Barium Cobaltite Case
Garcés, Diana Andrea
La0.5ba0.5coo3-Δ
Labaco2o6-Δ
Cathode
Sofc
title_short The Soft Chemical Route Improving IT-SOFC Cathode Performance: The Lanthanum Barium Cobaltite Case
title_full The Soft Chemical Route Improving IT-SOFC Cathode Performance: The Lanthanum Barium Cobaltite Case
title_fullStr The Soft Chemical Route Improving IT-SOFC Cathode Performance: The Lanthanum Barium Cobaltite Case
title_full_unstemmed The Soft Chemical Route Improving IT-SOFC Cathode Performance: The Lanthanum Barium Cobaltite Case
title_sort The Soft Chemical Route Improving IT-SOFC Cathode Performance: The Lanthanum Barium Cobaltite Case
dc.creator.none.fl_str_mv Garcés, Diana Andrea
Mogni, Liliana Verónica
author Garcés, Diana Andrea
author_facet Garcés, Diana Andrea
Mogni, Liliana Verónica
author_role author
author2 Mogni, Liliana Verónica
author2_role author
dc.subject.none.fl_str_mv La0.5ba0.5coo3-Δ
Labaco2o6-Δ
Cathode
Sofc
topic La0.5ba0.5coo3-Δ
Labaco2o6-Δ
Cathode
Sofc
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv In this work we studied the oxygen reduction mechanism in three cathodes: cubic La0.5Ba0.5CoO3-δ obtained by Solid State Reaction (SSR) in air at 1100 ºC; a phase with cationic order, laminar structure and tetragonal symmetry, LaBaCo2O6-δ, was obtained by SSR under inert gas at 1150 ºC. An intermediate compound with the same nominal composition was obtained at lower temperature by a soft chemical route involving a sol-gel process. Despite that the crystal structures of the oxides obtained by SSR are different, their microstructures are similar but quite different to that obtained by the soft chemical route. The area specific resistance (ASR) as a function of pO2 was studied at 700 °C by Electrochemical Impedance Spectroscopy (EIS). We found that both, crystal structure and microstructure affect strongly the ASR. Whereas cubic perovskite showed lower ASR than tetragonal, the ASR of the oxide obtained by the chemical route decreased almost one order of magnitude at higher pO2, respect to that obtained by conventional SSR.
Fil: Garcés, Diana Andrea. Comisión Nacional de Energía Atómica. Gerencia de Area de Aplicaciones de la Tecnología Nuclear. Gerencia de Investigación Aplicada; Argentina
Fil: Mogni, Liliana Verónica. Comisión Nacional de Energía Atómica. Gerencia de Area de Aplicaciones de la Tecnología Nuclear. Gerencia de Investigación Aplicada; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
description In this work we studied the oxygen reduction mechanism in three cathodes: cubic La0.5Ba0.5CoO3-δ obtained by Solid State Reaction (SSR) in air at 1100 ºC; a phase with cationic order, laminar structure and tetragonal symmetry, LaBaCo2O6-δ, was obtained by SSR under inert gas at 1150 ºC. An intermediate compound with the same nominal composition was obtained at lower temperature by a soft chemical route involving a sol-gel process. Despite that the crystal structures of the oxides obtained by SSR are different, their microstructures are similar but quite different to that obtained by the soft chemical route. The area specific resistance (ASR) as a function of pO2 was studied at 700 °C by Electrochemical Impedance Spectroscopy (EIS). We found that both, crystal structure and microstructure affect strongly the ASR. Whereas cubic perovskite showed lower ASR than tetragonal, the ASR of the oxide obtained by the chemical route decreased almost one order of magnitude at higher pO2, respect to that obtained by conventional SSR.
publishDate 2013
dc.date.none.fl_str_mv 2013-10
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/17664
Garcés, Diana Andrea; Mogni, Liliana Verónica; The Soft Chemical Route Improving IT-SOFC Cathode Performance: The Lanthanum Barium Cobaltite Case; Electrochemical Society; ECS Transactions; 58; 2; 10-2013; 191-198
1938-5862
url http://hdl.handle.net/11336/17664
identifier_str_mv Garcés, Diana Andrea; Mogni, Liliana Verónica; The Soft Chemical Route Improving IT-SOFC Cathode Performance: The Lanthanum Barium Cobaltite Case; Electrochemical Society; ECS Transactions; 58; 2; 10-2013; 191-198
1938-5862
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://ecst.ecsdl.org/content/58/2/191.abstract
info:eu-repo/semantics/altIdentifier/doi/10.1149/05802.0191ecst
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Electrochemical Society
publisher.none.fl_str_mv Electrochemical Society
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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