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Oxygen diffusion and surface exchange coefficients measurements under high pressure: Comparative behavior of oxygen deficient versus over-stoichiometric air electrode materials

hal.structure.identifierLaboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux [LITEN]
dc.contributor.authorLAURENCIN, Jérôme
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGAMON, Jacinthe
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorFLURA, Aurélien
hal.structure.identifierLaboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux [LITEN]
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorSDANGHI, Giuseppe
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorFOURCADE, Sébastien
hal.structure.identifierInstitute of Energy and Climate Research - Fundamental Electrochemistry [ IEK-9]
dc.contributor.authorVAIBHAV, Vibhu
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorBASSAT, Jean-Marc
dc.date.issued2023
dc.identifier.issn1615-6846
dc.description.abstractEnMixed ionic electronic conductors (MIECs) oxides are used as electrode materials for solid oxide cell (SOC) application, as they combine high electronic conductivity as well as high oxygen diffusivity and oxygen surface exchange coefficients. The ionic transport properties can be directly determined thanks to the isotopic exchange depth profiling (IEDP) method. To date, the reported measurements have been performed at ambient pressure and below. However, for a higher efficiency of hydrogen production at the system level, it is envisaged to operate the cell between 10 to 60 bar. To characterize the MIEC oxides properties in such conditions, an innovative setup able to operate up to a total pressure of 50 bar and 900 °C has been developed. The main goal of this study was to compare the behaviour of two types of reference materials: the oxygen deficient La-Sr-Fe-Co perovskites, and the overstoechiometric lanthanide nickelates Ln2NiO4+δ (Ln = La, Pr, Nd). Diffusion and surface exchange coefficients obtained under 6.3 bar of oxygen are measured and their evolution discussed in light of the change in oxygen stoichiometries. This analysis allows better understanding of the dependency of the surface exchange coefficient with the oxygen partial pressure.
dc.language.isoen
dc.publisherWiley-VCH Verlag
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/
dc.subject.enOxygen Diffusion
dc.subject.enSurface Exchange
dc.subject.enMIEC Oxides
dc.subject.enOxygen Stoichiometry
dc.subject.enSolid Oxide Cells
dc.title.enOxygen diffusion and surface exchange coefficients measurements under high pressure: Comparative behavior of oxygen deficient versus over-stoichiometric air electrode materials
dc.typeArticle de revue
dc.identifier.doi10.1002/fuce.202300048
dc.subject.halChimie/Matériaux
bordeaux.journalFuel Cells
bordeaux.page366-376
bordeaux.volume23
bordeaux.issue6
bordeaux.peerReviewedoui
hal.identifierhal-04200288
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04200288v1
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