dc.creator | Fernández Muñoz, Sol | es |
dc.creator | Chacartegui, Ricardo | es |
dc.creator | Alba Rodríguez, María Desirée | es |
dc.creator | Ramírez Rico, Joaquín | es |
dc.date.accessioned | 2024-02-07T12:36:27Z | |
dc.date.available | 2024-02-07T12:36:27Z | |
dc.date.issued | 2024-03 | |
dc.identifier.citation | Fernández Muñoz, S., Chacartegui, R., Alba Rodríguez, M.D. y Ramírez Rico, J. (2024). Optimising anode supported BaZr1-xYxO3-δ electrolytes for solid oxide fuel cells: Microstructure, phase evolution and residual stresses analysis. Journal of Power Sources, 596 (234070). https://doi.org/10.1016/j.jpowsour.2024.234070. | |
dc.identifier.issn | 0378-7753 | es |
dc.identifier.issn | 1873-2755 | es |
dc.identifier.uri | https://hdl.handle.net/11441/154827 | |
dc.description.abstract | 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. | es |
dc.format | application/pdf | es |
dc.format.extent | 8 p. | es |
dc.language.iso | eng | es |
dc.publisher | Elsevier | es |
dc.relation.ispartof | Journal of Power Sources, 596 (234070). | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | Fuel-cell | es |
dc.subject | Electrolyte | es |
dc.subject | Residual stress | es |
dc.subject | Sintering | es |
dc.subject | Proton conductors | es |
dc.title | Optimising anode supported BaZr1-xYxO3-δ electrolytes for solid oxide fuel cells: Microstructure, phase evolution and residual stresses analysis | es |
dc.type | info:eu-repo/semantics/article | es |
dc.type.version | info:eu-repo/semantics/publishedVersion | es |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Ingeniería Energética | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Construcciones Arquitectónicas II (ETSIE) | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Física de la Materia Condensada | es |
dc.relation.projectID | PID2019-107019RB-I00 | es |
dc.relation.publisherversion | https://www.sciencedirect.com/science/article/pii/S0378775324000211 | es |
dc.identifier.doi | 10.1016/j.jpowsour.2024.234070 | es |
dc.contributor.group | Universidad de Sevilla. TEP137: Máquinas y Motores Térmicos | es |
dc.contributor.group | Universidad de Sevilla. TEP172: Arquitectura: Diseño y Técnica | es |
dc.contributor.group | Universidad de Sevilla. FQM342: Materiales Biomiméticos y Multifuncionales | es |
dc.journaltitle | Journal of Power Sources | es |
dc.publication.volumen | 596 | es |
dc.publication.issue | 234070 | es |
dc.contributor.funder | Spanish Ministry of Science and Innovation co-financed with FEDER funds under Grant no. PID2019-107019RB-I00 | es |