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Associating and tuning sodium and oxygen mixed-ion conduction in niobium-based perovskites

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGOUGET, Guillaume
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMAUVY, Fabrice
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCHUNG, U‐chan
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorFOURCADE, Sébastien
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDUTTINE, Mathieu
hal.structure.identifierSolvay (France)
dc.contributor.authorBRAIDA, Marc‐david
hal.structure.identifierSolvay (France)
dc.contributor.authorMERCIER, Thierry Le
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDEMOURGUES, Alain
dc.date.issued2020-03-10
dc.identifier.issn1616-301X
dc.description.abstractEnPure ionic conductors as solid‐state electrolytes are of high interest in electrochemical energy storage and conversion devices. They systematically involve only one ion as the charge carrier. The association of two mobile ionic species, one positively and the other negatively charged, in a specific network should strongly influence the total ion conduction. Nb5+‐ (4d0) and Ti4+‐based (3d0) derived‐perovskite frameworks containing Na+ and O2− as mobile species are investigated as mixed ion conductors by electrochemical impedance spectroscopy. The design of Na+ blocking layers via sandwiched pellet sintered by spark plasma sintering at high temperatures leads to quantified transport number of both ionic charge carriers tNa+ and tO2−. In the 350–700 °C temperature range, ionic conductivity can be tuned from major Na+ contribution (tNa+ = 88%) for NaNbO3 to pure O2− transport in NaNb0.9Ti0.1O2.95 phase. Such a Ti‐substitution is accompanied with a ≈100‐fold increase in the oxygen conductivity, approaching the best values for pure oxygen conductors in this temperature range. Besides the demonstration of tunable mixed ion conduction with quantifiable cationic and anionic contributions in a single solid‐state structure, a strategy is established from structural analysis to develop other architectures with improved mixed ionic conductivity.
dc.language.isoen
dc.publisherWiley
dc.subject.enniobate perovskites
dc.subject.enoxygen conductivity
dc.subject.ensodium conductivity
dc.subject.enmixed ion conduction
dc.subject.enspark plasma sintering
dc.title.enAssociating and tuning sodium and oxygen mixed-ion conduction in niobium-based perovskites
dc.typeArticle de revue
dc.identifier.doi10.1002/adfm.201909254
dc.subject.halChimie/Matériaux
bordeaux.journalAdvanced Functional Materials
bordeaux.page1909254 (12 p.)
bordeaux.volume30
bordeaux.issue11
bordeaux.peerReviewedoui
hal.identifierhal-02508010
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02508010v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Advanced%20Functional%20Materials&rft.date=2020-03-10&rft.volume=30&rft.issue=11&rft.spage=1909254%20(12%20p.)&rft.epage=1909254%20(12%20p.)&rft.eissn=1616-301X&rft.issn=1616-301X&rft.au=GOUGET,%20Guillaume&MAUVY,%20Fabrice&CHUNG,%20U%E2%80%90chan&FOURCADE,%20S%C3%A9bastien&DUTTINE,%20Mathieu&rft.genre=article


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