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Reversible oxygen participation to the redox processes revealed for Li1.20Mn0.54Co0.13Ni0.13O2

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
hal.structure.identifierToyota Motor Europe NV/SA
dc.contributor.authorKOGA, Hideyuki
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCROGUENNEC, Laurence
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.authorDOUHIL, Kaïs
hal.structure.identifierSynchrotron SOLEIL [SSOLEIL]
dc.contributor.authorBELIN, Stéphanie
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
hal.structure.identifierInstitut des Sciences Moléculaires [ISM]
dc.contributor.authorBOURGEOIS, Lydie
hal.structure.identifierInstitut Laue-Langevin [ILL]
dc.contributor.authorSUARD, Emmanuelle
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorWEILL, François
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDELMAS, Claude
dc.date.issued2013
dc.identifier.issn0013-4651
dc.description.abstractEnMaterials prepared by chemical Li deintercalation with NO2BF4 from Li1.20Mn0.54Co0.13Ni0.13O2 and chemical Li reinsertion with LiI show very similar chemical composition, oxidation state of each transition metal ion, structural properties and electrochemical performance to those of the material recovered after the 1st electrochemical cycle. Investigations combining redox titration, magnetic measurement, neutron diffraction and chemical analyzes reveal that uncommon redox processes are involved during the first charge at high voltage and explain the charge overcapacity and large reversible discharge capacity obtained for this material. This further assesses our proposal that oxygen, in addition to nickel and cobalt, participates to the redox processes in charge: within the bulk oxygen is oxidized without oxygen loss, whereas at the surface oxygen is oxidized to O2 and irreversibly lost from the structure. During the subsequent discharge, in addition to nickel, cobalt and oxygen, manganese is also slightly involved in the redox processes (reduction) to compensate for the initial surface oxygen loss.
dc.language.isoen
dc.publisherElectrochemical Society
dc.subject.enSolid solution
dc.subject.enLithium
dc.subject.enBatteries
dc.subject.enRedox process
dc.subject.enIntercalation compounds
dc.title.enReversible oxygen participation to the redox processes revealed for Li1.20Mn0.54Co0.13Ni0.13O2
dc.typeArticle de revue
dc.identifier.doi10.1149/2.038306jes
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of The Electrochemical Society
bordeaux.pageA786-A792
bordeaux.volume160
bordeaux.issue6
bordeaux.peerReviewedoui
hal.identifierhal-00807341
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00807341v1
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