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Synthesis, structure, and electrochemical properties of LiFeV2O7

hal.structure.identifierLaboratory of Chemistry and Electrochemistry of Solids
dc.contributor.authorBENABED, Yasmine
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCASTRO, Laurent
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.authorDARRIET, Jacques
hal.structure.identifierLaboratory of Chemistry and Electrochemistry of Solids
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDOLLÉ, Mickaël
dc.date.issued2017-11-02
dc.identifier.issn0897-4756
dc.description.abstractEnThe structure of a novel compound, LiFeV2O7, has been determined from single-crystal X-ray diffraction data. The phase crystallizes in the non-centrosymmetric monoclinic Cc space group. The structure can be described as a layered type compound alternating (Li,Fe)–O sheets and V–O chains that are perpendicular to the [101] direction. Within the (Li,Fe)–O sheets, “hexagonal” holes are formed and assembled into tunnels running parallel to the [201] direction and hosting the vanadium atoms. Original (V4O14)8– strings are observed within the structure in association with well-known (V2O7)4– pyrovanadate units. Both units alternate parallel to the [−101] direction. LiFeV2O7 displays a reversible insertion–deinsertion mechanism for Li+ ions. The theoretical capacity for the insertion of one Li+ into LiFeV2O7 reaches 97 mAh/g. When the compound is cycled between 3.50 and 2.35 V versus Li+/Li, the electrochemical curve displays an initial capacity of 100 mAh/g, with 85% of this capacity retained after 60 cycles. No evidence of the formation of Fe4+ upon oxidation to a high voltage was observed. LiFeV2O7 represents the first reported phase in the Li2O–Fe2O3–V2O5 ternary diagram with electrochemical activities.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.title.enSynthesis, structure, and electrochemical properties of LiFeV2O7
dc.typeArticle de revue
dc.identifier.doi10.1021/acs.chemmater.7b03271
dc.subject.halChimie/Matériaux
bordeaux.journalChemistry of Materials
bordeaux.page9292-9299
bordeaux.volume29
bordeaux.issue21
bordeaux.peerReviewedoui
hal.identifierhal-02570003
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02570003v1
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