Methods for preparing composition, sheet comprising the...

C - Chemistry – Metallurgy – 08 – J

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C08J 3/03 (2006.01) C08J 3/09 (2006.01) C08J 5/18 (2006.01) C08K 3/04 (2006.01) H01M 4/88 (2006.01)

Patent

CA 2738409

Methods for preparing an electrode comprise: providing a mixture of carbon particles and a solvent and shearing the mixture to form a dispersion of the carbon particles in the solvent; adding non-fribrillaied poly(tetrafluoroethylene) to the dispersion to provide a resultant mixture and shearing the resultant mixture until at least a portion of the poly(tetrafluoroethylene) has been fibrillated; processing the resultant mixture into a sheet; and attaching the sheet onto a current collector. Methods for preparing sheet for the electrode and composition for the sheet are also provided.

L'invention porte sur des procédés de préparation d'une électrode qui comportent : lutilisation d'un mélange de particules de carbone et d'un solvant et le cisaillement du mélange pour obtenir une dispersion des particules de carbone dans le solvant; l'ajout de poly(tétrafluoroéthylène) non fibrillé à la dispersion pour obtenir ainsi un mélange et le cisaillement du mélange ainsi obtenu jusqu'à fibrillation d'au moins une partie du poly(tétrafluoroéthylène); le traitement du mélange ainsi obtenu sous forme de feuille, puis la fixation de la feuille sur un collecteur de courant. L'invention porte également sur des procédés de préparation d'une feuille pour l'électrode et d'une composition pour la feuille.

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