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hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorLEVASSEUR, Stéphane
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMÉNÉTRIER, Michel
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDELMAS, Claude
dc.date.issued2002
dc.identifier.issn0378-7753
dc.description.abstractEnA detailed characterization of the structural modifications and redox processes occurring upon lithium deintercalation from the Lix0Co1−yMgyO2 materials (x0=1.0 and 1.10; y=0.0, 0.03, 0.05 and 0.06) was performed in order to determine the effect of Mg doping on the cycling properties. Using electrochemical tests, X-ray diffraction (XRD), 7Li MAS NMR and electrical properties measurements, we show that the LixCo1−yMgyO2 system exhibits a solid solution existing in the whole deintercalation range studied (0.30≤×≤1.0). These phases exhibit reversible capacities equivalent to that of LiCoO2 upon cycling with a good structural stability. Moreover, the 7Li MAS NMR study shows that the structural defects (O vacancies and intermediate spin Co3+ ions) which are present in the starting Mg-doped phases govern the electronic properties upon lithium deintercalation. Indeed, regardless of the presence of Mg ions in the structure, a behavior similar to that of the LixCoO2 (1
dc.language.isoen
dc.publisherElsevier
dc.subject.enLiCoO2
dc.subject.enLayered oxide
dc.subject.enNMR
dc.subject.enLithium battery
dc.subject.enElectrical properties
dc.subject.enMagnesium substitution
dc.title.enOn the LixCo1-yMgyO2 system upon deintercalation: electrochemical, electronic properties and 7Li MAS NMR studies
dc.typeArticle de revue
dc.identifier.doi10.1016/S0378-7753(02)00456-1
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of Power Sources
bordeaux.page419-427
bordeaux.volume112
bordeaux.issue2
bordeaux.peerReviewedoui
hal.identifierhal-00817513
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00817513v1
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