Optimising anode supported BaZr1-xYxO3-δ electrolytes for solid oxide fuel cells: Microstructure, phase evolution and residual stresses analysis

Yttrium-doped BaZrO3 is a promising electrolyte for intermediate-temperature protonic ceramic fuel cells. In the anode-supported configuration, a slurry containing the electrolyte is deposited on the surface of a calcined porous anode and sintered. Differences in sintering behaviour and thermal expa...

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Autores: Fernández Muñoz, Sol, Chacartegui, Ricardo, Alba-Rodríguez, María Desirée, Ramírez Rico, Joaquín
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2024
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/154827
Acceso en línea:https://hdl.handle.net/11441/154827
https://doi.org/10.1016/j.jpowsour.2024.234070
Access Level:acceso abierto
Palabra clave:Fuel-cell
Electrolyte
Residual stress
Sintering
Proton conductors
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spelling Optimising anode supported BaZr1-xYxO3-δ electrolytes for solid oxide fuel cells: Microstructure, phase evolution and residual stresses analysisFernández Muñoz, SolChacartegui, RicardoAlba-Rodríguez, María DesiréeRamírez Rico, JoaquínFuel-cellElectrolyteResidual stressSinteringProton conductorsYttrium-doped BaZrO3 is a promising electrolyte for intermediate-temperature protonic ceramic fuel cells. In the anode-supported configuration, a slurry containing the electrolyte is deposited on the surface of a calcined porous anode and sintered. Differences in sintering behaviour and thermal expansion coefficients for the anode and electrolyte result in elastic residual stresses that can impact the long-term stability of the cell during cyclic operation. Half-cells using BaZr0.8Y0.2O3-δ as the electrolyte were fabricated using the solid-state reaction sintering method under various sintering conditions. Comprehensive microstructure and residual stress analyses as a function of processing parameters were performed using two-dimensional X-ray diffraction, Rietveld refinement, and scanning electron microscopy, before and after the half-cells were reduced under hydrogen, giving a complete picture of phase, microstructure, and stress evolution under thermal and reduction cycles like the actual operation of the cell. Our results reveal that a temperature of 1400 °C and shorter soaking times might be advantageous for obtaining phase-pure and thin yttrium-doped BaZrO3 electrolytes with improved microstructure and the presence of compressive residual stress. These findings offer valuable insights into optimising the fabrication process of BaZrO3-based electrolytes, leading to enhanced performance and long-term stability of anode-supported protonic ceramic fuel cells operating at intermediate temperatures.ElsevierIngeniería EnergéticaConstrucciones Arquitectónicas IIFísica de la Materia CondensadaTEP137: Máquinas y Motores TérmicosTEP172: Arquitectura: Diseño y TécnicaFQM342: Materiales Biomiméticos y MultifuncionalesSpanish Ministry of Science and Innovation co-financed with FEDER funds under Grant no. PID2019-107019RB-I002024info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/154827https://doi.org/10.1016/j.jpowsour.2024.234070reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésJournal of Power Sources, 596 (234070).PID2019-107019RB-I00https://www.sciencedirect.com/science/article/pii/S0378775324000211info:eu-repo/semantics/openAccessoai:idus.us.es:11441/1548272026-06-17T12:51:07Z
dc.title.none.fl_str_mv Optimising anode supported BaZr1-xYxO3-δ electrolytes for solid oxide fuel cells: Microstructure, phase evolution and residual stresses analysis
title Optimising anode supported BaZr1-xYxO3-δ electrolytes for solid oxide fuel cells: Microstructure, phase evolution and residual stresses analysis
spellingShingle Optimising anode supported BaZr1-xYxO3-δ electrolytes for solid oxide fuel cells: Microstructure, phase evolution and residual stresses analysis
Fernández Muñoz, Sol
Fuel-cell
Electrolyte
Residual stress
Sintering
Proton conductors
title_short Optimising anode supported BaZr1-xYxO3-δ electrolytes for solid oxide fuel cells: Microstructure, phase evolution and residual stresses analysis
title_full Optimising anode supported BaZr1-xYxO3-δ electrolytes for solid oxide fuel cells: Microstructure, phase evolution and residual stresses analysis
title_fullStr Optimising anode supported BaZr1-xYxO3-δ electrolytes for solid oxide fuel cells: Microstructure, phase evolution and residual stresses analysis
title_full_unstemmed Optimising anode supported BaZr1-xYxO3-δ electrolytes for solid oxide fuel cells: Microstructure, phase evolution and residual stresses analysis
title_sort Optimising anode supported BaZr1-xYxO3-δ electrolytes for solid oxide fuel cells: Microstructure, phase evolution and residual stresses analysis
dc.creator.none.fl_str_mv Fernández Muñoz, Sol
Chacartegui, Ricardo
Alba-Rodríguez, María Desirée
Ramírez Rico, Joaquín
author Fernández Muñoz, Sol
author_facet Fernández Muñoz, Sol
Chacartegui, Ricardo
Alba-Rodríguez, María Desirée
Ramírez Rico, Joaquín
author_role author
author2 Chacartegui, Ricardo
Alba-Rodríguez, María Desirée
Ramírez Rico, Joaquín
author2_role author
author
author
dc.contributor.none.fl_str_mv Ingeniería Energética
Construcciones Arquitectónicas II
Física de la Materia Condensada
TEP137: Máquinas y Motores Térmicos
TEP172: Arquitectura: Diseño y Técnica
FQM342: Materiales Biomiméticos y Multifuncionales
Spanish Ministry of Science and Innovation co-financed with FEDER funds under Grant no. PID2019-107019RB-I00
dc.subject.none.fl_str_mv Fuel-cell
Electrolyte
Residual stress
Sintering
Proton conductors
topic Fuel-cell
Electrolyte
Residual stress
Sintering
Proton conductors
description Yttrium-doped BaZrO3 is a promising electrolyte for intermediate-temperature protonic ceramic fuel cells. In the anode-supported configuration, a slurry containing the electrolyte is deposited on the surface of a calcined porous anode and sintered. Differences in sintering behaviour and thermal expansion coefficients for the anode and electrolyte result in elastic residual stresses that can impact the long-term stability of the cell during cyclic operation. Half-cells using BaZr0.8Y0.2O3-δ as the electrolyte were fabricated using the solid-state reaction sintering method under various sintering conditions. Comprehensive microstructure and residual stress analyses as a function of processing parameters were performed using two-dimensional X-ray diffraction, Rietveld refinement, and scanning electron microscopy, before and after the half-cells were reduced under hydrogen, giving a complete picture of phase, microstructure, and stress evolution under thermal and reduction cycles like the actual operation of the cell. Our results reveal that a temperature of 1400 °C and shorter soaking times might be advantageous for obtaining phase-pure and thin yttrium-doped BaZrO3 electrolytes with improved microstructure and the presence of compressive residual stress. These findings offer valuable insights into optimising the fabrication process of BaZrO3-based electrolytes, leading to enhanced performance and long-term stability of anode-supported protonic ceramic fuel cells operating at intermediate temperatures.
publishDate 2024
dc.date.none.fl_str_mv 2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/11441/154827
https://doi.org/10.1016/j.jpowsour.2024.234070
url https://hdl.handle.net/11441/154827
https://doi.org/10.1016/j.jpowsour.2024.234070
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Journal of Power Sources, 596 (234070).
PID2019-107019RB-I00
https://www.sciencedirect.com/science/article/pii/S0378775324000211
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
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