Patent ID: 6287726
Filing Date: 2001-09-11
Classification: H01M,Y02E

Abstract:
A method for producing a nickel positive electrode for alkaline storage batteries comprising particles of a nickel hydroxide material, a coating layer which comprises a compound of cobalt with a mean valence over 2 and which coats said particles, and a compound of at least one metallic element selected from the group consisting of Y and Yb, comprising the steps of:adding an aqueous solution containing a cobalt ion and an ion of at least one element selected from the group consisting of Y and Yb to an aqueous dispersion of particles of a nickel hydroxide material under a pH condition adjusted with an alkaline aqueous solution to obtain an active material in which said particles of nickel hydroxide material are coated with a coating layer comprising said cobalt compound and said compound of said at least one metallic element, andheating said active material in the presence of both oxygen and an alkaline aqueous solution.