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Electrochemical characterization of PrBa2−xSrxCu3O6+δ layered oxides as innovative and efficient oxygen electrode for IT-SOFCs

hal.structure.identifierDipartimento di Energia [Milano]
dc.contributor.authorCORDARO, Giulio
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorFLURA, Aurelien
hal.structure.identifierDipartimento di Energia [Milano]
dc.contributor.authorDONAZZI, Alessandro
hal.structure.identifierDipartimento di Ingegneria e scienze applicate
dc.contributor.authorPELOSATO, Renato
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMAUVY, Fabrice
hal.structure.identifierPolitecnico di Milano [Milan] [POLIMI]
dc.contributor.authorCRISTIANI, Cinzia
hal.structure.identifierPolitecnico di Milano [Milan] [POLIMI]
dc.contributor.authorDOTELLI, Giovanni
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGRENIER, Jean-Claude
dc.date.issued2020
dc.identifier.issn0167-2738
dc.description.abstractEnPrBa2Cu3O6+δ (P) and PrBa1.5Sr0.5Cu3O6+δ (PS) layered perovskite-type oxides are synthesized and characterized as oxygen electrodes in IT-SOFCs. The layered structure of P and PS compounds is constituted by the regular alternation along the crystallographic c axis of PrO planes, Cu2+ chains (CN = 4) and Cu3+ pyramidal (CN = 5) layers. Interesting features of the PrBa2Cu3O6+δ structure are the absence of cobalt, the presence of aliovalent cations and large amounts of oxygen vacancies. The substitution of 25% Ba with Sr is evaluated in order to improve the electronic conductivity of the undoped material. The compounds are synthesized via Citrate-Nitrate procedure and characterized by XRPD, 4-probe conductivity tests (100–800 °C) and EIS measurements on symmetric cells in air varying the temperature (450–850 °C). SEM images of post mortem cells are collected to evaluate the adhesion between components, layers thickness and particle morphology. Sr doping does not significantly improve the electrical conductivity but prompts a considerable hysteresis in the P sample between the cooling and the heating ramps. Conductivity values are lower than 100 S cm−1, but no electrical limitations are observed in EIS results. The introduction of a thin PrDC interlayer greatly reduces the Area Specific Resistances for both the compounds and the 0.15 Ω cm2 target is almost fulfilled at 600 °C (0.17 Ω cm2 for PS + PrDC sample).
dc.language.isoen
dc.publisherElsevier
dc.subject.enPraseodymium barium cuprate
dc.subject.enLayered perovskite
dc.subject.enCathode
dc.subject.enOxygen electrode
dc.subject.enIT-SOFC
dc.subject.enEIS
dc.title.enElectrochemical characterization of PrBa2−xSrxCu3O6+δ layered oxides as innovative and efficient oxygen electrode for IT-SOFCs
dc.typeArticle de revue
dc.identifier.doi10.1016/j.ssi.2020.115286
dc.subject.halChimie/Matériaux
bordeaux.journalSolid State Ionics
bordeaux.page115286
bordeaux.volume348
bordeaux.peerReviewedoui
hal.identifierhal-02879342
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02879342v1
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