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O'3-Na(x)VO(2) System: A Superstructure for Na(1/2)VO(2).

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDIDIER, Christophe
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGUIGNARD, Marie
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDARRIET, Jacques
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDELMAS, Claude
dc.date.issued2012-10-15
dc.identifier.issn0020-1669
dc.description.abstractEnThe electrochemical cycling in a sodium battery of the lamellar oxide NaVO(2) is reversible in the Na(x)VO(2) composition range 1/2 ≤ x ≤ 1. The complex electrochemical curve reveals the presence of several transitions taking place during deintercalation. With the help of in situ X-ray diffraction, we observed the structural transitions taking place between Na(2/3)VO(2) and Na(1/2)VO(2). The diffractograms show the presence of several monophasic domains separated by biphasic domains. All phases present a monoclinic distortion of the α-NaFeO(2) structure in the composition range 1/2 ≤ x ≤ 2/3. Moreover the presence of a superstructure is evidenced for Na(1/2)VO(2). It is the first time that an ordered structure is reported at the Na(1/2)MO(2) composition with an O'3 oxygen stacking. A thorough investigation of electrochemically obtained O'3-Na(1/2)VO(2) was performed. The structure refinement reveals the existence of a sodium/vacancy ordering, with a peculiar arrangement of the V-V distances hinting at a pairing of vanadium atoms. Our first measurements of the physical properties of O'3-Na(1/2)VO(2) show a semiconductor behavior and a complex thermal dependence of the magnetic susceptibility related to the pairing of the vanadium atoms.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.subject.enElectrochemistry
dc.subject.enBatteries
dc.subject.enInorganic compounds
dc.typeArticle de revue
dc.identifier.doi10.1021/ic301505e
dc.subject.halChimie/Matériaux
bordeaux.journalInorganic Chemistry
bordeaux.page11007-11016
bordeaux.volume51
bordeaux.issue20
bordeaux.peerReviewedoui
hal.identifierhal-00745833
hal.version1
hal.popularnon
hal.audienceInternationale
dc.title.ptO'3-Na(x)VO(2) System: A Superstructure for Na(1/2)VO(2).
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00745833v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Inorganic%20Chemistry&rft.date=2012-10-15&rft.volume=51&rft.issue=20&rft.spage=11007-11016&rft.epage=11007-11016&rft.eissn=0020-1669&rft.issn=0020-1669&rft.au=DIDIER,%20Christophe&GUIGNARD,%20Marie&DARRIET,%20Jacques&DELMAS,%20Claude&rft.genre=article


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