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Multi-scale analysis of the diffusion barrier layer of gadolinia-doped ceria in a solid oxide fuel cell operated in a stack for 3000 h

hal.structure.identifierCatalonia Institute for Energy Research [IREC]
dc.contributor.authorMORALES, Miguel
hal.structure.identifierCatalonia Institute for Energy Research [IREC]
dc.contributor.authorMIGUEL-PÉREZ, Veronica
hal.structure.identifierCatalonia Institute for Energy Research [IREC]
dc.contributor.authorTARANCÓN, Albert
hal.structure.identifierCatalonia Institute for Energy Research [IREC]
dc.contributor.authorSLODCZYK, Anna
hal.structure.identifierCatalonia Institute for Energy Research [IREC]
dc.contributor.authorTORRELL, Marc
hal.structure.identifierCatalan Institute of Nanoscience and Nanotechnology [ICN2]
dc.contributor.authorBALLESTEROS, Bélen
hal.structure.identifierHTceramix SA
dc.contributor.authorOUWELTJES, Jan Pieter
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorBASSAT, Jean-Marc.
hal.structure.identifierSOLIDPower SpA
dc.contributor.authorMONTINARO, Dario
hal.structure.identifierCatalonia Institute for Energy Research [IREC]
dc.contributor.authorMORATA, Alejandro
dc.date.issued2017
dc.identifier.issn0378-7753
dc.description.abstractEnThe state-of-the-art materials for SOFCs are yttria-stabilized zirconia as electrolyte and lanthanum strontium cobalt ferrite as cathode. However, the formation of insulating phases between them requires the use of diffusion barriers, typically made of gadolinia doped ceria. The study of the stability of this layer during the fabrication and in operando is currently one of the major goals of the SOFC industry. In this work, the cation inter-diffusion at the cathode/barrier layer/electrolyte region is analysed for an anode-supported cell industrially fabricated by conventional techniques, assembled in a short-stack and tested under real operation conditions for 3000 h. A comprehensive study of this cell, and an equivalent non-operated one, is performed in order to understand the inter-diffusion mechanisms with possible effects on the final performance. The analyses evidence that the cation diffusion is occurring during the fabrication process. Despite the significant diffusion of Ce,Gd, Zr, Y and Sr cations, the formation of typically reported CGO-YSZ solid solution is not observed while the presence of isolated grains of SrZrO3 is proved. All in all, this study presents new insights into the stability of the typically employed diffusion barriers for solid oxide cells that will guide future strategies to improve their performance and durability.
dc.language.isoen
dc.publisherElsevier
dc.subject.enStrontium
dc.subject.enZirconium
dc.subject.enCation diffusion
dc.subject.enSrZrO3
dc.subject.enCGO interlayer
dc.subject.enSOFC
dc.subject.enRaman spectroscopy
dc.title.enMulti-scale analysis of the diffusion barrier layer of gadolinia-doped ceria in a solid oxide fuel cell operated in a stack for 3000 h
dc.typeArticle de revue
dc.identifier.doi10.1016/j.jpowsour.2017.01.109
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of Power Sources
bordeaux.page141-151
bordeaux.volume344
bordeaux.peerReviewedoui
hal.identifierhal-01485423
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01485423v1
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