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Reaction Mechanisms of La2NiO4+δ Oxygen Electrodes Operated in Electrolysis and Fuel Cell Mode

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
hal.structure.identifierLaboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux [LITEN]
dc.contributor.authorSDANGHI, Giuseppe
hal.structure.identifierLaboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux [LITEN]
hal.structure.identifierMatériaux Interfaces ELectrochimie [MIEL]
dc.contributor.authorYEFSAH, Lydia
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMAUVY, Fabrice
hal.structure.identifierMatériaux Interfaces ELectrochimie [MIEL]
dc.contributor.authorDJURADO, Elisabeth
hal.structure.identifierLaboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux [LITEN]
dc.contributor.authorDAVID, Thomas
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorBASSAT, Jean-Marc.
hal.structure.identifierLaboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux [LITEN]
dc.contributor.authorLAURENCIN, Jérôme
dc.date.issued2022
dc.identifier.issn0013-4651
dc.description.abstractEnThe reaction mechanisms governing the electrochemical behavior of La 2 NiO 4+ δ (LNO) oxygen electrodes for Solid Oxide Cells have been investigated through a coupled experimental and modeling approach. In this frame, a set of experiments was performed on a symmetrical cell using a three-electrode setup. A micro-scale electrode model considering two reaction pathways, i.e. bulk and surface paths, has been developed to describe the experimental results. The microstructural parameters of the electrode were obtained by FIB-SEM tomography. The model was calibrated using the experimental polarization curves measured at different temperatures, and it was validated using electrochemical impedance diagrams recorded at open circuit potential (OCP) and under polarization for different oxygen partial pressures. It has been evidenced that the LNO reaction mechanism depends on both the temperature and the polarization. At OCP, the reaction mechanism is controlled by the bulk path at 650 °C and by the surface path at higher temperatures. A transition from the bulk path towards the surface path was observed under cathodic polarizations. These results have been interpreted by considering the evolution of the LNO over stoichiometry with the electrode polarization. The evolution of the electrode polarization resistance with the oxygen partial pressure has been also investigated.
dc.description.sponsorshipEleCtrOdes architecturées pour la Réalisation d'Electrolyseurs de la Vapeur d'Eau à haute température - ANR-18-CE05-0036
dc.language.isoen
dc.publisherElectrochemical Society
dc.subject.enOxygen electrode reaction
dc.subject.ennickelates
dc.subject.enSOFC
dc.subject.enSOEC
dc.subject.enModeling
dc.subject.enEIS
dc.subject.enpolarization curves
dc.title.enReaction Mechanisms of La2NiO4+δ Oxygen Electrodes Operated in Electrolysis and Fuel Cell Mode
dc.typeArticle de revue
dc.identifier.doi10.1149/1945-7111/ac58c3
dc.subject.halChimie/Autre
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of The Electrochemical Society
bordeaux.page034518 (15 p.)
bordeaux.volume169
bordeaux.issue3
bordeaux.peerReviewedoui
hal.identifierhal-03619737
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03619737v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20The%20Electrochemical%20Society&rft.date=2022&rft.volume=169&rft.issue=3&rft.spage=034518%20(15%20p.)&rft.epage=034518%20(15%20p.)&rft.eissn=0013-4651&rft.issn=0013-4651&rft.au=SDANGHI,%20Giuseppe&YEFSAH,%20Lydia&MAUVY,%20Fabrice&DJURADO,%20Elisabeth&DAVID,%20Thomas&rft.genre=article


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