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Dual lithium insertion and conversion mechanisms in a titanium-based mixed-anion nanocomposite

hal.structure.identifierChemical Sciences and Engineering
dc.contributor.authorDAMBOURNET, Damien
hal.structure.identifierX-ray Science Division [XSD]
dc.contributor.authorCHAPMAN, Karena W.
hal.structure.identifierX-ray Science Division [XSD]
dc.contributor.authorCHUPAS, Peter J.
hal.structure.identifierChemical Sciences and Engineering
dc.contributor.authorGERALD, Rex E.
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorPENIN, Nicolas
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorLABRUGERE, Christine
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDEMOURGUES, Alain
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorTRESSAUD, Alain
hal.structure.identifierChemical Sciences and Engineering
dc.contributor.authorAMINE, Khalil
dc.date.issued2011
dc.identifier.issn0002-7863
dc.description.abstractEnThe electrochemical reaction of lithium with a vacancy-containing titanium hydroxyfluoride was studied. On the basis of pair distribution function analysis, NMR, and X-ray photoelectron spectroscopy, we propose that the material undergoes partitioning upon initial discharge to form a nanostructured composite containing crystalline Li(x)TiO(2), surrounded by a Ti(0) and LiF layer. The Ti(0) is reoxidized upon reversible charging to an amorphous TiF(3) phase via a conversion reaction. The crystalline Li(x)TiO(2) is involved in an insertion reaction. The resulting composite electrode, Ti(0)-LiF/Li(x)TiO(2) ⇔ TiF(3)/ Li(y)TiO(2), allows reaction of more than one Li per Ti, providing a route to higher capacities while improving the energy efficiency compared to pure conversion chemistries.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.title.enDual lithium insertion and conversion mechanisms in a titanium-based mixed-anion nanocomposite
dc.typeArticle de revue
dc.identifier.doi10.1021/ja204284h
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of the American Chemical Society
bordeaux.page13240-13243
bordeaux.volume133
bordeaux.issue34
bordeaux.peerReviewedoui
hal.identifierhal-00626975
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00626975v1
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