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Electrochemical characterization of PrBa2−xSrxCu3O6+δ layered oxides as innovative and efficient oxygen electrode for IT-SOFCs
hal.structure.identifier | Dipartimento di Energia [Milano] | |
dc.contributor.author | CORDARO, Giulio | |
hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
dc.contributor.author | FLURA, Aurelien | |
hal.structure.identifier | Dipartimento di Energia [Milano] | |
dc.contributor.author | DONAZZI, Alessandro | |
hal.structure.identifier | Dipartimento di Ingegneria e scienze applicate | |
dc.contributor.author | PELOSATO, Renato | |
hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
dc.contributor.author | MAUVY, Fabrice | |
hal.structure.identifier | Politecnico di Milano [Milan] [POLIMI] | |
dc.contributor.author | CRISTIANI, Cinzia | |
hal.structure.identifier | Politecnico di Milano [Milan] [POLIMI] | |
dc.contributor.author | DOTELLI, Giovanni | |
hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
dc.contributor.author | GRENIER, Jean-Claude | |
dc.date.issued | 2020 | |
dc.identifier.issn | 0167-2738 | |
dc.description.abstractEn | PrBa2Cu3O6+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.iso | en | |
dc.publisher | Elsevier | |
dc.subject.en | Praseodymium barium cuprate | |
dc.subject.en | Layered perovskite | |
dc.subject.en | Cathode | |
dc.subject.en | Oxygen electrode | |
dc.subject.en | IT-SOFC | |
dc.subject.en | EIS | |
dc.title.en | Electrochemical characterization of PrBa2−xSrxCu3O6+δ layered oxides as innovative and efficient oxygen electrode for IT-SOFCs | |
dc.type | Article de revue | |
dc.identifier.doi | 10.1016/j.ssi.2020.115286 | |
dc.subject.hal | Chimie/Matériaux | |
bordeaux.journal | Solid State Ionics | |
bordeaux.page | 115286 | |
bordeaux.volume | 348 | |
bordeaux.peerReviewed | oui | |
hal.identifier | hal-02879342 | |
hal.version | 1 | |
hal.popular | non | |
hal.audience | Internationale | |
hal.origin.link | https://hal.archives-ouvertes.fr//hal-02879342v1 | |
bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Solid%20State%20Ionics&rft.date=2020&rft.volume=348&rft.spage=115286&rft.epage=115286&rft.eissn=0167-2738&rft.issn=0167-2738&rft.au=CORDARO,%20Giulio&FLURA,%20Aurelien&DONAZZI,%20Alessandro&PELOSATO,%20Renato&MAUVY,%20Fabrice&rft.genre=article |
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