Nonaqueous electrolyte secondary battery

Details Nonaqueous electrolyte secondary battery Nonaqueous electrolyte secondary battery

H - Electricity

01

M

H01M 10/0566 (2010.01) H01M 4/131 (2010.01) H01M 4/505 (2010.01) H01M 10/058 (2010.01) H01M 10/38 (2006.01)

Patent

CA 2521166

A nonaqueous electrolyte secondary battery which has a positive electrode containing lithium cobalt oxide as a positive active material, a negative electrode containing a graphite material and a nonaqueous electrolyte solution containing ethylene carbonate as a solvent and which is charged with an end-of-charge voltage of at least 4.3 V. Characteristically, the battery uses,as the positive active material,lithium cobalt oxide obtained by firing a mixture of a lithium salt, tricobalt tetraoxide (Co3O4) and a zirconium compound and having particle surfaces onto which the zirconium compound adheres.

L'invention concerne une batterie secondaire à électrolyte non aqueuse comprenant une tension finale de charge supérieure ou égale à 4,3V, comprenant une électrode positive contenant du cobaltate de lithium utilisé en tant que matériau actif de l'électrode positive, et une électrode négative contenant un matériau en graphite, et une solution électrolytique non aqueuse contenant un éthylène carbonate utilisé en tant que solvant. Ladite batterie est caractérisée par le fait que le cobaltate de lithium obtenu par la mise à feu d'un mélange d'un sel de lithium, d'un tricobalte tetroxyde (Co3O4) et d'un composé de zirconium, dont la surface particulaire contient un composé de zirconium, est utilisé en tant que matériau actif de l'électrode positive.

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