Patent ID: 6489060
Filing Date: 2002-12-03
Classification: C01G,C01P,H01M,Y02E,Y02P,Y10T

Abstract:
A non-aqueous rechargeable lithium manganese oxide battery having reduced capacity fade rate during cycling at elevated temperature, said battery comprising:a lithium manganese oxide spinel structure compound cathode, a lithium insertion compound anode, a separator, and a non-aqueous electrolyte including a lithium salt dissolved in a non-aqueous solvent, wherein: the spinel structure compound is coated with the decomposition products of one or more compounds of foreign metals with atomic number greater than 11 that reduce the capacity fade rate of the battery during cycling at elevated temperature, wherein said decomposition products are formed by heating a mixture of said spinel structure compound and said foreign metal compounds at a temperature at which said foreign metal compounds decompose to coat the surface of said spinel structure compound without entering the bulk of the spinel structure or extracting lithium therefrom.