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Surface structure and electrochemical characteristics of plasma-fluorinated petroleum cokes for lithium ion battery

hal.structure.identifierDepartment of Applied Chemistry
dc.contributor.authorNAKAJIMA, Tsuyoshi
hal.structure.identifierDepartment of Applied Chemistry
dc.contributor.authorSHIBATA, Seiko
hal.structure.identifierDepartment of Applied Chemistry
dc.contributor.authorNAGA, Kazuhisa
hal.structure.identifierDepartment of Applied Chemistry
dc.contributor.authorOHZAWA, Yoshimi
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
hal.structure.identifierLaboratoire Colloïdes et Matériaux Divisés [LCMD]
dc.contributor.authorGROULT, Henri
hal.structure.identifierCentre de Recherche sur la Matière Divisée [CRMD]
dc.contributor.authorWARMONT, Fabienne
dc.date.issued2007
dc.identifier.issn0378-7753
dc.description.abstractEnPlasma-fluorination of petroleum coke and those heat-treated at 1860, 2300 and 2800 °C (abbreviated to PC, PC1860, PC2300 and PC2800) was conducted for 15, 30 and 60 min using CF4 gas at 90 °C. Fluorine contents obtained by elemental analysis were negligible except PC fluorinated for 60 min (0.7 at.%). Fluorine concentration on the surface decreased with increasing heat-treatment temperature of petroleum coke, i.e. from PC to PC2800 when plasma-fluorination was made for 30 and 60 min. Transmission electron microscopic observation revealed that the closed edges of PC2800 were destroyed and opened by plasma-treatment. Plasma-fluorination increased surface disorder of heat-treated petroleum cokes, however, slightly reduced surface areas. These surface structure changes increased first coulombic efficiencies of PC2300 and PC2800 by 6–8 and 8–10% at both 60 and 150 mA g−1, respectively.
dc.language.isoen
dc.publisherElsevier
dc.subject.enPlasma-fluorination
dc.subject.enSurface modification
dc.subject.enCarbon anode
dc.subject.enLithium ion battery
dc.title.enSurface structure and electrochemical characteristics of plasma-fluorinated petroleum cokes for lithium ion battery
dc.typeArticle de revue
dc.identifier.doi10.1016/j.jpowsour.2007.03.008
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of Power Sources
bordeaux.page265-271
bordeaux.volume168
bordeaux.issue1
bordeaux.peerReviewedoui
hal.identifierhal-00150404
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00150404v1
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