Rechargeable lithium battery using separator partially...

Details Rechargeable lithium battery using separator partially... Rechargeable lithium battery using separator partially...

H - Electricity

01

M

H01M 2/14 (2006.01)

Patent

CA 2527639

Disclosed are a separator for a battery, which is coated with a gel polymer over 40-60% of total separator area, and a rechargeable lithium battery using the separator. The separator partially coated with a gel polymer reduces the battery resistance so that the battery power can be improved. Additionally, the separator increases electrolyte impregnation rate and provides uniform electrolyte impregnation, thereby improving the life, capacity and high-rate discharge property of a battery. Further, the separator permits electrode reactions to be performed uniformly, thereby preventing lithium precipitation and improving the battery safety.

L'invention concerne un séparateur de batterie revêtu d'un polymère gel au-dessus de 40-60 % de sa surface totale, ainsi qu'une batterie au lithium rechargeable mettant en application ce séparateur. Ce séparateur revêtu partiellement par un gel polymère limite la résistance de la batterie, de façon à pouvoir en améliorer la puissance. De plus, le séparateur augmente la vitesse d'imprégnation de l'électrolyte et permet d'obtenir une imprégnation électrolytique uniforme ce qui permet d'améliorer la durée de vie, la capacité et les propriétés de décharge rapide de cette batterie. Ce séparateur permet également aux électrodes de produire des réactions uniformes, ce qui empêche la précipitation du lithium et augmente la sécurité de la batterie.

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