Influence of anode functional layers on electrochemical performance and mechanical strength in microtubular solid oxide fuel cells fabricated by gel-casting

Anode-supported microtubular solid oxide fuel cells (mT-SOFCs) using samaria-doped ceria (SDC) as electrolyte were fabricated, varying the composition and number of anode functional layers (AFLs), by combining the aqueous gel-casting and spray-coating techniques. Suitable aqueous slurry formulation...

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Autores: Morales, Miguel, Laguna-Bercero, M. A.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2018
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/181117
Acceso en línea:http://hdl.handle.net/10261/181117
Access Level:acceso abierto
Palabra clave:Anode functional layer (AFL)
Anode support
Doped ceria
Mechanical properties
Microtubular
Solid oxide fuel cells (SOFCs)
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spelling Influence of anode functional layers on electrochemical performance and mechanical strength in microtubular solid oxide fuel cells fabricated by gel-castingMorales, MiguelLaguna-Bercero, M. A.Anode functional layer (AFL)Anode supportDoped ceriaMechanical propertiesMicrotubularSolid oxide fuel cells (SOFCs)Anode-supported microtubular solid oxide fuel cells (mT-SOFCs) using samaria-doped ceria (SDC) as electrolyte were fabricated, varying the composition and number of anode functional layers (AFLs), by combining the aqueous gel-casting and spray-coating techniques. Suitable aqueous slurry formulation of NiO–SDC was prepared using agarose as a gelling agent for gel-casting of tubular supports. Afterward, 40:60 and 50:50 NiO:SDC (wt %) as AFLs and SDC electrolyte were deposited by spray-coating and subsequently co-sintered. Finally, mT-SOFCs with 2.5 mm outer diameter and thicknesses of 380 μm support; 0, 12, and 24 μm AFLs; 15 μm electrolyte; and 30 μm cathode were obtained. The influence of AFLs on the performance and mechanical integrity was investigated for the three cells. For this purpose, electrochemical and mechanical tests at both macroscopic and micro-/nanometric scales (at the AFLs region) were determined by flexural strength and nanoindentation techniques, respectively. The results evidence that the use of AFLs with an adequate composition and microstructure in the mT-SOFCs is required to improve the performance and mechanical strength of the cell. The cell with a single-layer AFL of 50:50 NiO:SDC (wt %) and 12 μm thickness exhibited the best performance (0.52 W·cm–2) at 650 °C using hydrogen as fuel and air as oxidant.The present work was financed by the Spanish Government (Ministerio de Economia y Competitividad) and the Feder program of the European Union with Project MAT2015-68078-R.Peer reviewedAmerican Chemical SocietyMinisterio de Economía y Competitividad (España)European CommissionConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]201920192018info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/181117reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2015-68078-Rhttp://dx.doi.org/10.1021/acsaem.8b00115Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1811172026-05-22T06:33:51Z
dc.title.none.fl_str_mv Influence of anode functional layers on electrochemical performance and mechanical strength in microtubular solid oxide fuel cells fabricated by gel-casting
title Influence of anode functional layers on electrochemical performance and mechanical strength in microtubular solid oxide fuel cells fabricated by gel-casting
spellingShingle Influence of anode functional layers on electrochemical performance and mechanical strength in microtubular solid oxide fuel cells fabricated by gel-casting
Morales, Miguel
Anode functional layer (AFL)
Anode support
Doped ceria
Mechanical properties
Microtubular
Solid oxide fuel cells (SOFCs)
title_short Influence of anode functional layers on electrochemical performance and mechanical strength in microtubular solid oxide fuel cells fabricated by gel-casting
title_full Influence of anode functional layers on electrochemical performance and mechanical strength in microtubular solid oxide fuel cells fabricated by gel-casting
title_fullStr Influence of anode functional layers on electrochemical performance and mechanical strength in microtubular solid oxide fuel cells fabricated by gel-casting
title_full_unstemmed Influence of anode functional layers on electrochemical performance and mechanical strength in microtubular solid oxide fuel cells fabricated by gel-casting
title_sort Influence of anode functional layers on electrochemical performance and mechanical strength in microtubular solid oxide fuel cells fabricated by gel-casting
dc.creator.none.fl_str_mv Morales, Miguel
Laguna-Bercero, M. A.
author Morales, Miguel
author_facet Morales, Miguel
Laguna-Bercero, M. A.
author_role author
author2 Laguna-Bercero, M. A.
author2_role author
dc.contributor.none.fl_str_mv Ministerio de Economía y Competitividad (España)
European Commission
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Anode functional layer (AFL)
Anode support
Doped ceria
Mechanical properties
Microtubular
Solid oxide fuel cells (SOFCs)
topic Anode functional layer (AFL)
Anode support
Doped ceria
Mechanical properties
Microtubular
Solid oxide fuel cells (SOFCs)
description Anode-supported microtubular solid oxide fuel cells (mT-SOFCs) using samaria-doped ceria (SDC) as electrolyte were fabricated, varying the composition and number of anode functional layers (AFLs), by combining the aqueous gel-casting and spray-coating techniques. Suitable aqueous slurry formulation of NiO–SDC was prepared using agarose as a gelling agent for gel-casting of tubular supports. Afterward, 40:60 and 50:50 NiO:SDC (wt %) as AFLs and SDC electrolyte were deposited by spray-coating and subsequently co-sintered. Finally, mT-SOFCs with 2.5 mm outer diameter and thicknesses of 380 μm support; 0, 12, and 24 μm AFLs; 15 μm electrolyte; and 30 μm cathode were obtained. The influence of AFLs on the performance and mechanical integrity was investigated for the three cells. For this purpose, electrochemical and mechanical tests at both macroscopic and micro-/nanometric scales (at the AFLs region) were determined by flexural strength and nanoindentation techniques, respectively. The results evidence that the use of AFLs with an adequate composition and microstructure in the mT-SOFCs is required to improve the performance and mechanical strength of the cell. The cell with a single-layer AFL of 50:50 NiO:SDC (wt %) and 12 μm thickness exhibited the best performance (0.52 W·cm–2) at 650 °C using hydrogen as fuel and air as oxidant.
publishDate 2018
dc.date.none.fl_str_mv 2018
2019
2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/181117
url http://hdl.handle.net/10261/181117
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/MAT2015-68078-R
http://dx.doi.org/10.1021/acsaem.8b00115
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,81155

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