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Control of the LiFePO4 electrochemical properties using low-cost iron precursor in a melt process

hal.structure.identifierDepartment of Chemistry
dc.contributor.authorTALEBI-ESFANDARANI, M.
hal.structure.identifierDepartment of Chemistry
dc.contributor.authorROUSSELOT, S.
hal.structure.identifierDepartment of Chemistry
dc.contributor.authorGAUTHIER, Michel
hal.structure.identifierDepartment of Chemical Engineering
dc.contributor.authorSAURIOL, P.
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDUTTINE, Mathieu
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorWATTIAUX, Alain
hal.structure.identifierUniversity of Western Ontario [UWO]
dc.contributor.authorLIU, Y.
hal.structure.identifierUniversity of Western Ontario [UWO]
dc.contributor.authorSUN, A.
hal.structure.identifierJohnson Matthey Battery Materials Ltd.
dc.contributor.authorLIANG, G.
hal.structure.identifierDepartment of Chemistry
dc.contributor.authorDOLLÉ, Michael
dc.date.issued2016
dc.identifier.issn1432-8488
dc.description.abstractEnLiFePO4 was prepared from low-cost iron ore concentrate (containing 4.48 wt.% SiO2 and MgO, CaO and Al2O3 below 0.5 wt.% as contaminant) using a melt synthesis. X-ray diffraction (XRD) refinement associated with Mössbauer spectroscopy and scanning electron microscopy-energy dispersive spectroscopy (SEM-EDX) analyses are used to track the location of Si in the material. It is shown that the iron content in the melt can be used as a means to control the doping rate of elements from iron ore concentrate (IOC) precursor according to the formula (Li1 − zAz)(Fe1 − yMy)(P1 − xSix)O4. Electrochemical behavior of the material is affected by the doping of LiFePO4. While capacity is decreased in doped material, the cycling stability is much improved. When dopants are out of LiFePO4 structure, capacity retention dramatically drops as well as capacity due to the gravimetric impact of impurity phases. A trade-off between high capacity and best cycling performance is necessary. For instance, slight lack of iron in the melt (6 % deficiency) leads to a capacity only 2 % lower than that of pure Fe2O3-based material for the same stoichiometry and fairly good capacity retention.
dc.language.isoen
dc.publisherSpringer Verlag
dc.subject.enLiFePO4
dc.subject.enMelt synthesisIron
dc.subject.enIron ore concentrate
dc.subject.enCompositions
dc.subject.enImpurities
dc.title.enControl of the LiFePO4 electrochemical properties using low-cost iron precursor in a melt process
dc.typeArticle de revue
dc.identifier.doi10.1007/s10008-016-3324-2
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of Solid State Electrochemistry
bordeaux.page3481–3490
bordeaux.volume20
bordeaux.issue12
bordeaux.peerReviewedoui
hal.identifierhal-01415409
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01415409v1
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