Binder for batteries and electrode compositions and...

Details Binder for batteries and electrode compositions and... Binder for batteries and electrode compositions and...

C - Chemistry, Metallurgy

08

L

C08L 27/00 (2006.01) C08F 259/08 (2006.01) C08L 81/00 (2006.01) H01M 4/62 (2006.01)

Patent

CA 2179392

A binder for use in batteries which is in the form of an aqueous or nonaqueous dispersion or a powder comprising core-shell composite fine particles 0.05 to 1 µ m in mean particle size and each having a core of a fibrillating polytetrafluoroethylene and a shell of a nonfibrillating polymer, the composite fine particles having a core-to-shell ratio by weight of 98:2 to 50:50, and electrode compositions and batteries incorporating the binder.

L'invention concerne un liant pour piles, comprenant une dispersion aqueuse ou non aqueuse ou une poudre constituée de particules composites fines à noyau et coquille, d'un diamètre moyen de 0,5- mu m et composées d'un polytétrafluoroethylène formant des fibrilles, constituant le noyau de ces particules, et d'un polymère ne formant pas de fibrilles, constituant la coquille de ces particules, le rapport en poids du noyau à la coquille pouvant aller de 98:2 à 50:50.

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