Nonaqueous lithium secondary battery

H - Electricity – 01 – M

Patent

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H01M 4/133 (2010.01) H01M 4/583 (2010.01)

Patent

CA 2423043

A nonaqueous lithium secondary battery comprising a positive electrode, a negative electrode, and a nonaqueous electrolyte, wherein: 1) the positive electrode comprises a porous carbonaceous material whose BET specific surface area is at least 500 m2/g, or a mixture of a porous carbonaceous material whose BET specific surface area is at least 500 m2/g and a material capable of electrochemically occluding and releasing lithium; and 2) the negative electrode comprises a carbonaceous material whose BET specific surface area is 20 to 1000 m2/g.

L'invention concerne une cellule secondaire de lithium non aqueux comprenant une électrode positive, une électrode négative et un électrolyte non aqueux, se caractérisant en ce que 1) l'électrode positive comprend un matériau carboné poreux présentant une zone de surface spécifique par la méthode BET de 500 m<2>/g ou plus, ou comprend un mélange d'un matériau carboné poreux présentant une zone de surface spécifique par la méthode BET de 500 m<2>/g ou plus et d'un matériau pouvant retenir et libérer du lithium de manière électrochimique, et (2) l'électrode négative comprend un matériau carboné présentant une zone de surface spécifique par la méthode BET de 20 à 1000 m<2>/g.

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