Negative electrode for lithium secondary cell and method for...

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H01M 4/02 (2006.01) H01M 4/04 (2006.01) H01M 4/38 (2006.01) H01M 4/62 (2006.01) H01M 4/66 (2006.01) H01M 4/80 (2006.01) H01M 4/58 (2006.01) H01M 10/40 (2006.01)

Patent

CA 2420104

A negative electrode for a lithium secondary cell, characterized in that it is prepared by a method comprising providing a conductive metal foil having a surface roughness of 0.2 m or more as a collector and a mixture of active material particles containing silicon and/or a silicon alloy with a conductive metal powder and sintering the mixture on the surface of the collector; and a a lithium secondary cell comprising the negative electrode.

L'invention concerne une électrode négative destinée à un accumulateur au lithium. Cette électrode est caractérisée en ce qu'elle est préparée au moyen d'un procédé consistant à préparer une feuille métallique conductrice présentant une rugosité superficielle égale ou supérieure à 0,2 µm, constituant le collecteur, et un mélange de particules de matière active contenant du silicium et/ou un alliage de silicium et de poudre métallique conductrice, et à fritter ce mélange sur la surface du collecteur. L'invention concerne également un accumulateur au lithium comprenant cette électrode négative.

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