Nonaqueous electrolyte secondary battery

Details Nonaqueous electrolyte secondary battery Nonaqueous electrolyte secondary battery

H - Electricity

01

M

H01M 10/26 (2006.01) H01M 4/52 (2006.01)

Patent

CA 2525923

A nonaqueous electrolyte secondary battery including a negative electrode containing a graphite material as the negative active material,a positive electrode containing lithium cobalt oxide as a main component of the positive active material and a nonaqueous electrolyte solution, the battery being characterized in that the lithium cobalt oxide contains a group IVA element and a group IIA element of the periodic table, the nonaqueous electrolyte solution contains 0.2 - 1.5 % by weight of a sulfonyl-containing compound and preferably further contains 0.5 - 4 % by weight of vinylene carbonate.

Une batterie secondaire à Electrolyte non aqueux composEe d'une Electrode nEgative contenant un matEriau de graphite comme matEriau actif d'Electrode nEgative, d'une Electrode positive principalement constituEe de cobaltate de lithium comme matEriau actif d'Electrode positive et d'une solution d'Electrolyte non aqueux, se caractErise en ce que le cobaltate de lithium contient un ElEment du groupe IVA et un ElEment du groupe IIA du tableau pEriodique, et en ce que la solution d'Electrolyte non aqueux contient de 0,2 A 1,5 % en poids d'un composE possédant un groupe sulfonyle et aussi, de prEfErence, 0,54 % en poids de carbonate de vinylEne.

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