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Reactivity of TiH2 hydride with lithium ion: Evidence for a new conversion mechanism

hal.structure.identifierLaboratoire réactivité et chimie des solides - UMR CNRS 7314 UPJV [LRCS]
dc.contributor.authorOUMELLAL, Y.
hal.structure.identifierLaboratoire réactivité et chimie des solides - UMR CNRS 7314 UPJV [LRCS]
dc.contributor.authorZAIDI, Warda
hal.structure.identifierLaboratoire réactivité et chimie des solides - UMR CNRS 7314 UPJV [LRCS]
dc.contributor.authorBONNET, Jean-Pierre
hal.structure.identifierInstitut de Chimie et des Matériaux Paris-Est [ICMPE]
dc.contributor.authorCUEVAS, Fermin
hal.structure.identifierInstitut de Chimie et des Matériaux Paris-Est [ICMPE]
dc.contributor.authorLATROCHE, Michel
hal.structure.identifierInstitut de Chimie et des Matériaux Paris-Est [ICMPE]
dc.contributor.authorZHANG, Junxian
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorBOBET, Jean-Louis
hal.structure.identifierLaboratoire réactivité et chimie des solides - UMR CNRS 7314 UPJV [LRCS]
dc.contributor.authorROUGIER, Aline
hal.structure.identifierLaboratoire réactivité et chimie des solides - UMR CNRS 7314 UPJV [LRCS]
dc.contributor.authorAYMARD, Luc
dc.date.issued2012
dc.identifier.issn0360-3199
dc.description.abstractEnThe electrochemical reactivity of the face centered cubic (fcc) TiH2hydride with lithium ion was studied. A full discharge capacity of 1072 mAh/g at an average potential of 0.2 V can be achieved when the TiH2hydride electrode is ground with 10wt% of carbon. From X-ray diffraction (XRD) characterization of the electrodes, dehydrogenation of the titanium hydride via an electrochemical process occurs following different reaction steps. From 0 to 0.34 Li, an fcc δ-TiH2−x solid solution is formed according to the reaction δ-TiH2 (fcc) + 0.34 Li → δ TiH1.66 (fcc) + 0.34 LiH. Pursuing the dehydrogenation process from 0.34 to 1, the cubic solid solution δ-TiH2−x reacts with lithium ion and transforms partially in a distorted face centered orthorhombic phase δ-TiH (fco). At this stage, the absence of hexagonal close-packed (hcp) α-Ti formation is attributed to the peritectic transformation: hcp α-Ti(H) + fcc δ-TiH2−x → δ-TiH. From 1 to 2 Li, a usual conversionmechanism is observed leading to the formation of hcp α-Ti and LiH according to the reaction δ-TiH2−x (fcc) ↔ δ-TiH (fco) + Li → α-Ti (hcp) + LiH.
dc.language.isoen
dc.publisherElsevier
dc.subject.enTitanium hydrides
dc.subject.enConversion reactions
dc.subject.enLithium-ion batteries
dc.title.enReactivity of TiH2 hydride with lithium ion: Evidence for a new conversion mechanism
dc.typeArticle de revue
dc.identifier.doi10.1016/j.ijhydene.2012.01.107
dc.subject.halChimie/Matériaux
bordeaux.journalInternational Journal of Hydrogen Energy
bordeaux.page7831-7835
bordeaux.volume37
bordeaux.issue9
bordeaux.peerReviewedoui
hal.identifierhal-00702374
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00702374v1
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