Defect Chemistry, Electrical Properties, and Evaluation of New Oxides Sr2CoNb1@xTixO6@d (0,x,1) as Cathode Materials for Solid Oxide Fuel Cells

The perovskite series Sr2CoNb1@xTixO6@d (0,x,1) was investigated in the full compositional range to assess its potential as cathode material for solid oxide fuel cell (SOFC). The variation of transport properties and thus, the area specific resistances (ASR) are explained by a detailed investigation...

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Autores: Azcondo, María Teresa, Amador, Ulises, Muñoz-Gil, Daniel, García-Martín, Susana, Yuste, Mercedes, Pérez-Flore s, Juan Carlos, Muñoz Noval, Álvaro, Puente Orench, Inés
Tipo de recurso: artículo
Fecha de publicación:2017
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/19411
Acceso en línea:https://hdl.handle.net/20.500.14352/19411
Access Level:acceso abierto
Palabra clave:546
Cathode
Cobaltite
Perovskite
Solid oxide fuel cells
X-ray absorption spectroscopy
Química inorgánica (Química)
2303 Química Inorgánica
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oai_identifier_str oai:docta.ucm.es:20.500.14352/19411
network_acronym_str ES
network_name_str España
repository_id_str
spelling Defect Chemistry, Electrical Properties, and Evaluation of New Oxides Sr2CoNb1@xTixO6@d (0,x,1) as Cathode Materials for Solid Oxide Fuel CellsAzcondo, María TeresaAmador, UlisesMuñoz-Gil, DanielGarcía-Martín, SusanaYuste, MercedesPérez-Flore s, Juan CarlosMuñoz Noval, ÁlvaroPuente Orench, Inés546CathodeCobaltitePerovskiteSolid oxide fuel cellsX-ray absorption spectroscopyQuímica inorgánica (Química)2303 Química InorgánicaThe perovskite series Sr2CoNb1@xTixO6@d (0,x,1) was investigated in the full compositional range to assess its potential as cathode material for solid oxide fuel cell (SOFC). The variation of transport properties and thus, the area specific resistances (ASR) are explained by a detailed investigation of the defect chemistry. Increasing the titanium content from x=0–1 produces both oxidation of Co 3+ to Co4+ (from 0 up to 40%) and oxygen vacancies (from 6.0 to 5.7 oxygen atom/formula unit), although each charge compensation mechanism predominates in different compositional ranges. Neutron diffraction reveals that samples with high Ti-contents lose a significant amount of oxygen upon heating above 600 K. Oxygen is partially recovered upon cooling as the oxygen release and uptake show noticeably different kinetics. The complex defect chemistry of these compounds, together with the compositional changes upon heating/cooling cycles and atmospheres, produce a complicated behavior of electrical conductivity. Cathodes containing Sr2CoTiO6@d display low ASR values, 0,13 Wcm2 at 973 K, comparable to those of the best compounds reported so far, being a very promising cathode material for SOFC.Wiley-V C H VERLAG GMBHUniversidad Complutense de Madrid20172017-07-0120172017-07-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/19411reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Atribución-NoComercial-SinDerivadas 3.0 Españahttps://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/194112026-06-02T12:44:21Z
dc.title.none.fl_str_mv Defect Chemistry, Electrical Properties, and Evaluation of New Oxides Sr2CoNb1@xTixO6@d (0,x,1) as Cathode Materials for Solid Oxide Fuel Cells
title Defect Chemistry, Electrical Properties, and Evaluation of New Oxides Sr2CoNb1@xTixO6@d (0,x,1) as Cathode Materials for Solid Oxide Fuel Cells
spellingShingle Defect Chemistry, Electrical Properties, and Evaluation of New Oxides Sr2CoNb1@xTixO6@d (0,x,1) as Cathode Materials for Solid Oxide Fuel Cells
Azcondo, María Teresa
546
Cathode
Cobaltite
Perovskite
Solid oxide fuel cells
X-ray absorption spectroscopy
Química inorgánica (Química)
2303 Química Inorgánica
title_short Defect Chemistry, Electrical Properties, and Evaluation of New Oxides Sr2CoNb1@xTixO6@d (0,x,1) as Cathode Materials for Solid Oxide Fuel Cells
title_full Defect Chemistry, Electrical Properties, and Evaluation of New Oxides Sr2CoNb1@xTixO6@d (0,x,1) as Cathode Materials for Solid Oxide Fuel Cells
title_fullStr Defect Chemistry, Electrical Properties, and Evaluation of New Oxides Sr2CoNb1@xTixO6@d (0,x,1) as Cathode Materials for Solid Oxide Fuel Cells
title_full_unstemmed Defect Chemistry, Electrical Properties, and Evaluation of New Oxides Sr2CoNb1@xTixO6@d (0,x,1) as Cathode Materials for Solid Oxide Fuel Cells
title_sort Defect Chemistry, Electrical Properties, and Evaluation of New Oxides Sr2CoNb1@xTixO6@d (0,x,1) as Cathode Materials for Solid Oxide Fuel Cells
dc.creator.none.fl_str_mv Azcondo, María Teresa
Amador, Ulises
Muñoz-Gil, Daniel
García-Martín, Susana
Yuste, Mercedes
Pérez-Flore s, Juan Carlos
Muñoz Noval, Álvaro
Puente Orench, Inés
author Azcondo, María Teresa
author_facet Azcondo, María Teresa
Amador, Ulises
Muñoz-Gil, Daniel
García-Martín, Susana
Yuste, Mercedes
Pérez-Flore s, Juan Carlos
Muñoz Noval, Álvaro
Puente Orench, Inés
author_role author
author2 Amador, Ulises
Muñoz-Gil, Daniel
García-Martín, Susana
Yuste, Mercedes
Pérez-Flore s, Juan Carlos
Muñoz Noval, Álvaro
Puente Orench, Inés
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 546
Cathode
Cobaltite
Perovskite
Solid oxide fuel cells
X-ray absorption spectroscopy
Química inorgánica (Química)
2303 Química Inorgánica
topic 546
Cathode
Cobaltite
Perovskite
Solid oxide fuel cells
X-ray absorption spectroscopy
Química inorgánica (Química)
2303 Química Inorgánica
description The perovskite series Sr2CoNb1@xTixO6@d (0,x,1) was investigated in the full compositional range to assess its potential as cathode material for solid oxide fuel cell (SOFC). The variation of transport properties and thus, the area specific resistances (ASR) are explained by a detailed investigation of the defect chemistry. Increasing the titanium content from x=0–1 produces both oxidation of Co 3+ to Co4+ (from 0 up to 40%) and oxygen vacancies (from 6.0 to 5.7 oxygen atom/formula unit), although each charge compensation mechanism predominates in different compositional ranges. Neutron diffraction reveals that samples with high Ti-contents lose a significant amount of oxygen upon heating above 600 K. Oxygen is partially recovered upon cooling as the oxygen release and uptake show noticeably different kinetics. The complex defect chemistry of these compounds, together with the compositional changes upon heating/cooling cycles and atmospheres, produce a complicated behavior of electrical conductivity. Cathodes containing Sr2CoTiO6@d display low ASR values, 0,13 Wcm2 at 973 K, comparable to those of the best compounds reported so far, being a very promising cathode material for SOFC.
publishDate 2017
dc.date.none.fl_str_mv 2017
2017-07-01
2017
2017-07-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/19411
url https://hdl.handle.net/20.500.14352/19411
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución-NoComercial-SinDerivadas 3.0 España
https://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Atribución-NoComercial-SinDerivadas 3.0 España
https://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Wiley-V C H VERLAG GMBH
publisher.none.fl_str_mv Wiley-V C H VERLAG GMBH
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.301603

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