NOVELTY - The method comprises mixing a nickel hydroxide powder with a first alkali metal hydroxide and a cobalt salt solution at a temperature of 40-60 degrees C to form nickel hydroxide particles coated with a cobalt compound (1 wt.%), mixing a hydroxide solution and a strong oxidizing agent such as persulfate as a salt with the nickel hydroxide particles at a temperature of 120-125 degrees C for a period of 5-200 minutes to produce a modified nickel hydroxide, separating the modified nickel hydroxide from a mixture, and preparing an electrode mixture as a paste comprising the modified nickel hydroxide.    USE - The method is useful for making positive nickel hydroxide electrodes for a rechargeable battery including a nickel-metal hydride battery, a nickel-cadmium battery, nickel-zinc battery and power cell, where the battery is useful for hybrid electric vehicles, power tools, lawn and gardening tools.    ADVANTAGE - The method is capable of effectively making the positive electrodes with high reliability and performance, improved charge acceptance and reduced oxygen evolution thus enhancing charge and discharge capabilities, Amp hour capacities, power and energy densities, battery cycle characteristic, service life, mechanical stability and cell-to-cell uniformity of the battery and minimizing internal resistance and hydrogen gassing of the battery.    DETAILED DESCRIPTION - The method comprises mixing a nickel hydroxide powder with a first alkali metal hydroxide and a cobalt salt solution at a temperature of 40-60 degrees C to form nickel hydroxide particles coated with a cobalt compound (1 wt.%), mixing a hydroxide solution and a strong oxidizing agent such as persulfate as a salt with the nickel hydroxide particles at a temperature of 120-125 degrees C for a period of 5-200 minutes to produce a modified nickel hydroxide, separating the modified nickel hydroxide from a mixture, preparing an electrode mixture as a paste comprising the modified nickel hydroxide and cobalt metal, and incorporating the electrode mixture into a positive electrode. The step of separating the modified nickel hydroxide comprises washing the modified nickel hydroxide, drying the modified nickel hydroxide, filtering the modified nickel hydroxide, and washing the filtered modified nickel hydroxide. The positive electrode comprises the modified nickel hydroxide (60-95 wt.%) and cobalt (10 wt.%).    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic cross-sectional view of a nickel zinc battery cell.    Cylindrical assembly (301)    Negative collector disk (303)    Positive collector disk (305)    Tab (307)    Cap. (309)