The electrochemical properties of Sr(Ti,Fe)O3-δ for anodes in solid oxide fuel cells

Autores
Nenning, Andreas; Volgger, Lukas; Miller, Elizabeth; Mogni, Liliana Verónica; Barnett, Scott; Fleig, Jürgen
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Reduction-stable mixed ionic and electronic conductors such as Sr(Ti,Fe)O3-δ (STF) are promising materials for application in anodes of solid oxide fuel cells. The defect chemistry of STF and its properties as solid oxide fuel cell (SOFC) cathode have been studied thoroughly, while mechanistic investigations of its electrochemical properties as SOFC anode material are still scarce. In this study, thin film model electrodes of STF with 30% and 70% Fe content were investigated in H2+H2O atmosphere by electrochemical impedance spectroscopy. Lithographically patterned thin film Pt current collectors were applied on top or beneath the STF thin films to compensate for the low electronic conductivity under reducing conditions. Oxygen exchange resistances, electronic and ionic conductivities and chemical capacitances were quantified and discussed in a defect chemical model. Increasing Fe content increases the electro-catalytic activity of the STF surface as well as the electronic and ionic conductivity. Current collectors on top also increase the electrochemical activity due to a highly active Pt-atmosphere-STF triple phase boundary. Furthermore, the electrochemical activity depends decisively on the H2:H2O mixing ratio and the polarization. Fe0 nanoparticles may evolve on the surface in hydrogen rich atmospheres and increase the hydrogen adsorption rate.
Fil: Nenning, Andreas. ETH Zurich; Suiza
Fil: Volgger, Lukas. Vienna University of Technology; Austria
Fil: Miller, Elizabeth. Northwestern University; Estados Unidos
Fil: Mogni, Liliana Verónica. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Barnett, Scott. Northwestern University; Estados Unidos
Fil: Fleig, Jürgen. Vienna University of Technology; Austria
Materia
SOLID OXIDE FUEL CELL
ANODE
ELECTROCHEMISTY
DEFECT STRUCTURE
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:11336/65442
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling The electrochemical properties of Sr(Ti,Fe)O3-δ for anodes in solid oxide fuel cellsNenning, AndreasVolgger, LukasMiller, ElizabethMogni, Liliana VerónicaBarnett, ScottFleig, JürgenSOLID OXIDE FUEL CELLANODEELECTROCHEMISTYDEFECT STRUCTUREhttps://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2Reduction-stable mixed ionic and electronic conductors such as Sr(Ti,Fe)O3-δ (STF) are promising materials for application in anodes of solid oxide fuel cells. The defect chemistry of STF and its properties as solid oxide fuel cell (SOFC) cathode have been studied thoroughly, while mechanistic investigations of its electrochemical properties as SOFC anode material are still scarce. In this study, thin film model electrodes of STF with 30% and 70% Fe content were investigated in H2+H2O atmosphere by electrochemical impedance spectroscopy. Lithographically patterned thin film Pt current collectors were applied on top or beneath the STF thin films to compensate for the low electronic conductivity under reducing conditions. Oxygen exchange resistances, electronic and ionic conductivities and chemical capacitances were quantified and discussed in a defect chemical model. Increasing Fe content increases the electro-catalytic activity of the STF surface as well as the electronic and ionic conductivity. Current collectors on top also increase the electrochemical activity due to a highly active Pt-atmosphere-STF triple phase boundary. Furthermore, the electrochemical activity depends decisively on the H2:H2O mixing ratio and the polarization. Fe0 nanoparticles may evolve on the surface in hydrogen rich atmospheres and increase the hydrogen adsorption rate.Fil: Nenning, Andreas. ETH Zurich; SuizaFil: Volgger, Lukas. Vienna University of Technology; AustriaFil: Miller, Elizabeth. Northwestern University; Estados UnidosFil: Mogni, Liliana Verónica. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Barnett, Scott. Northwestern University; Estados UnidosFil: Fleig, Jürgen. Vienna University of Technology; AustriaElectrochemical Society2017-02-18info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/65442Nenning, Andreas; Volgger, Lukas; Miller, Elizabeth; Mogni, Liliana Verónica; Barnett, Scott; et al.; The electrochemical properties of Sr(Ti,Fe)O3-δ for anodes in solid oxide fuel cells; Electrochemical Society; Journal of the Electrochemical Society; 164; 4; 18-2-2017; F364-F3710013-4651CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1149/2.1271704jesinfo:eu-repo/semantics/altIdentifier/url/http://jes.ecsdl.org/content/164/4/F364info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:44:42Zoai:ri.conicet.gov.ar:11336/65442instacron: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 09:44:42.671CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv The electrochemical properties of Sr(Ti,Fe)O3-δ for anodes in solid oxide fuel cells
title The electrochemical properties of Sr(Ti,Fe)O3-δ for anodes in solid oxide fuel cells
spellingShingle The electrochemical properties of Sr(Ti,Fe)O3-δ for anodes in solid oxide fuel cells
Nenning, Andreas
SOLID OXIDE FUEL CELL
ANODE
ELECTROCHEMISTY
DEFECT STRUCTURE
title_short The electrochemical properties of Sr(Ti,Fe)O3-δ for anodes in solid oxide fuel cells
title_full The electrochemical properties of Sr(Ti,Fe)O3-δ for anodes in solid oxide fuel cells
title_fullStr The electrochemical properties of Sr(Ti,Fe)O3-δ for anodes in solid oxide fuel cells
title_full_unstemmed The electrochemical properties of Sr(Ti,Fe)O3-δ for anodes in solid oxide fuel cells
title_sort The electrochemical properties of Sr(Ti,Fe)O3-δ for anodes in solid oxide fuel cells
dc.creator.none.fl_str_mv Nenning, Andreas
Volgger, Lukas
Miller, Elizabeth
Mogni, Liliana Verónica
Barnett, Scott
Fleig, Jürgen
author Nenning, Andreas
author_facet Nenning, Andreas
Volgger, Lukas
Miller, Elizabeth
Mogni, Liliana Verónica
Barnett, Scott
Fleig, Jürgen
author_role author
author2 Volgger, Lukas
Miller, Elizabeth
Mogni, Liliana Verónica
Barnett, Scott
Fleig, Jürgen
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv SOLID OXIDE FUEL CELL
ANODE
ELECTROCHEMISTY
DEFECT STRUCTURE
topic SOLID OXIDE FUEL CELL
ANODE
ELECTROCHEMISTY
DEFECT STRUCTURE
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Reduction-stable mixed ionic and electronic conductors such as Sr(Ti,Fe)O3-δ (STF) are promising materials for application in anodes of solid oxide fuel cells. The defect chemistry of STF and its properties as solid oxide fuel cell (SOFC) cathode have been studied thoroughly, while mechanistic investigations of its electrochemical properties as SOFC anode material are still scarce. In this study, thin film model electrodes of STF with 30% and 70% Fe content were investigated in H2+H2O atmosphere by electrochemical impedance spectroscopy. Lithographically patterned thin film Pt current collectors were applied on top or beneath the STF thin films to compensate for the low electronic conductivity under reducing conditions. Oxygen exchange resistances, electronic and ionic conductivities and chemical capacitances were quantified and discussed in a defect chemical model. Increasing Fe content increases the electro-catalytic activity of the STF surface as well as the electronic and ionic conductivity. Current collectors on top also increase the electrochemical activity due to a highly active Pt-atmosphere-STF triple phase boundary. Furthermore, the electrochemical activity depends decisively on the H2:H2O mixing ratio and the polarization. Fe0 nanoparticles may evolve on the surface in hydrogen rich atmospheres and increase the hydrogen adsorption rate.
Fil: Nenning, Andreas. ETH Zurich; Suiza
Fil: Volgger, Lukas. Vienna University of Technology; Austria
Fil: Miller, Elizabeth. Northwestern University; Estados Unidos
Fil: Mogni, Liliana Verónica. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Barnett, Scott. Northwestern University; Estados Unidos
Fil: Fleig, Jürgen. Vienna University of Technology; Austria
description Reduction-stable mixed ionic and electronic conductors such as Sr(Ti,Fe)O3-δ (STF) are promising materials for application in anodes of solid oxide fuel cells. The defect chemistry of STF and its properties as solid oxide fuel cell (SOFC) cathode have been studied thoroughly, while mechanistic investigations of its electrochemical properties as SOFC anode material are still scarce. In this study, thin film model electrodes of STF with 30% and 70% Fe content were investigated in H2+H2O atmosphere by electrochemical impedance spectroscopy. Lithographically patterned thin film Pt current collectors were applied on top or beneath the STF thin films to compensate for the low electronic conductivity under reducing conditions. Oxygen exchange resistances, electronic and ionic conductivities and chemical capacitances were quantified and discussed in a defect chemical model. Increasing Fe content increases the electro-catalytic activity of the STF surface as well as the electronic and ionic conductivity. Current collectors on top also increase the electrochemical activity due to a highly active Pt-atmosphere-STF triple phase boundary. Furthermore, the electrochemical activity depends decisively on the H2:H2O mixing ratio and the polarization. Fe0 nanoparticles may evolve on the surface in hydrogen rich atmospheres and increase the hydrogen adsorption rate.
publishDate 2017
dc.date.none.fl_str_mv 2017-02-18
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/11336/65442
Nenning, Andreas; Volgger, Lukas; Miller, Elizabeth; Mogni, Liliana Verónica; Barnett, Scott; et al.; The electrochemical properties of Sr(Ti,Fe)O3-δ for anodes in solid oxide fuel cells; Electrochemical Society; Journal of the Electrochemical Society; 164; 4; 18-2-2017; F364-F371
0013-4651
CONICET Digital
CONICET
url http://hdl.handle.net/11336/65442
identifier_str_mv Nenning, Andreas; Volgger, Lukas; Miller, Elizabeth; Mogni, Liliana Verónica; Barnett, Scott; et al.; The electrochemical properties of Sr(Ti,Fe)O3-δ for anodes in solid oxide fuel cells; Electrochemical Society; Journal of the Electrochemical Society; 164; 4; 18-2-2017; F364-F371
0013-4651
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1149/2.1271704jes
info:eu-repo/semantics/altIdentifier/url/http://jes.ecsdl.org/content/164/4/F364
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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