Method of producing cathode active material for non-aqueous electrolyte secondary battery

摘要

In producing a cathode active material for a non-aqueous electrolyte secondary battery, an hydroxide or an oxyhydroxide of a 3d transition metal, e.g., MnOOH is exposed to an atmosphere of saturated water vapor containing alkali metal ions in a water mist preferably in a pressurized condition, so that the water mist substitutes the alkali metal ions for protons contained in the hydroxide or the oxyhydroxide.