Patent ID: 6090506
Filing Date: 2000-07-18
Classification: C01G,H01M,Y02E

Abstract:
A nonaqueous secondary battery comprising a sheet-shaped positive electrode having at least one layer containing a lithium-containing transition metal compound as a positive electrode material, a sheet-shaped negative electrode having at least one layer containing a negative electrode material capable of intercalating and deintercalating a lithium ion, a porous separator comprising polyolefines and a nonaqueous electrolyte containing a lithium salt, wherein at least one of said sheet-shaped negative electrode and said sheet-shaped positive electrode comprises three or more layers applied to one side of a current collector and the two layers furthest from said current collector each contain an insulating solid fine particle which doesn't substantially intercalate and deintercalate a lithium ion, wherein said two layers furthest from the current collector have different contents of the insulating solid fine particle which does not substantially intercalate and deintercalate a lithium ion and the content of the insulating solid fine particle in the outermost layer is 5% lower than that in the adjacent layer.