MANUFACTURE OF PASTE TYPE CADMIUM NEGATIVE ELECTRODE

摘要

PURPOSE:To increase oxygen gas absorbing capability in a paste type cadmium negative electrode and to shorten charging time by conducting nickel plating on the surface of the paste type cadmium in a nickel plating bath containing phosphate. CONSTITUTION:A plate coated with active material paste comprising cadmium oxide or cadmium hydroxide is nickel-plated in a nickel plating bath containing phosphate. The conductive layer of nickel metal is formed on the surface of the plate without forming nickel hydroxide which is an impurity. Since the increase in self-discharge caused by the nickel hydroxide is prevented, a paste type cadmium negative electrode having good oxygen gas absorbing efficiency can be obtained.