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Electrochemical behavior of plasma-fluorinated graphite for lithium ion batteries

hal.structure.identifierDepartment of Applied Chemistry
dc.contributor.authorNAKAJIMA, Tsuyoshi
hal.structure.identifierDepartment of Applied Chemistry
dc.contributor.authorGUPTA, Vinay
hal.structure.identifierDepartment of Applied Chemistry
dc.contributor.authorOHZAWA, Yoshimi
hal.structure.identifierDepartment of Polymer Chemistry
dc.contributor.authorKOH, Meiten
hal.structure.identifierDepartment of Polymer Chemistry
dc.contributor.authorSINGH, Ram Niwas
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorTRESSAUD, Alain
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDURAND, Etienne
dc.date.issued2002
dc.identifier.issn0378-7753
dc.description.abstractEnElectrochemical properties of plasma-fluorinated graphite samples have been investigated in 1 mol dm−3 LiClO4 ethylene carbonate (EC)/diethyl carbonate (DEC) solution at 25 °C. Fluorine contents in plasma-fluorinated graphite samples were in the range of 0-0.3 at.% by elemental analysis and surface fluorine concentrations obtained by X-ray photoelectron spectroscopy (XPS) were in the range of 3-12 at.%. Raman spectroscopy revealed that surface disordering of graphite was induced by plasma fluorination. Plasma treatment increased the surface areas of graphite samples by 26-55% and the pore volumes for the mesopores with diameters of 1.5-2 and 2-3 nm. Plasma-fluorinated graphites showed capacities higher than those of original graphites and even higher than the theoretical capacity of graphite, 372 mAh g−1, without any change of the profile of charge-discharge potential curves. The increments in the capacities were approximately 5, 10 and 15% for graphites with average particle diameters, 7, 25 and 40 μm, respectively. Furthermore, the coulombic efficiencies in first cycle were nearly the same as those for original graphites or higher by several percents.
dc.language.isoen
dc.publisherElsevier
dc.subject.enPlasma fluorination
dc.subject.enSurface modification
dc.subject.enGraphite electrode
dc.subject.enLithium ion battery
dc.title.enElectrochemical behavior of plasma-fluorinated graphite for lithium ion batteries
dc.typeArticle de revue
dc.identifier.doi10.1016/S0378-7753(01)00895-3
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of Power Sources
bordeaux.page108-114
bordeaux.volume104
bordeaux.issue1
bordeaux.peerReviewedoui
hal.identifierhal-00708244
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00708244v1
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