Preparation method of cobalt oxide coated nickel hydroxide composite material for alkaline rechargeable battery

[0025] Example 1 Preparation of Cobalt Oxide Coated Nickel Hydroxide Composite Material for Alkaline Secondary Battery

[0026] (1) Preparation of spherical nickel hydroxide precursor doped with yttrium

[0027] Nickel chloride, cobalt sulfate and yttrium sulfate are according to nickel, cobalt, yttrium molar ratio: nickel 90%, cobalt 7%, yttrium 3% are mixed uniformly the salt solution of the nickel cobalt yttrium of preparation 1 mol / liter, preparation concentration is 3 - Potassium hydroxide solution of 5 mol / liter, and the complexing agent for preparing ammonia concentration of 15% ammonia water, and simultaneously injected into the reaction kettle with stirring and dispersing function for chemical precipitation, wherein the flow rate of the salt solution is 3ml / min , the flow rate of potassium hydroxide is 6ml / min, the flow rate of ammonia solution is 3ml / min, the conditions for controlling the chemical reaction are that the pH is in the range of 11-13, and the temperatur...

[0032] Example 2 Preparation of Cobalt Oxide Coated Nickel Hydroxide Composite Material for Alkaline Secondary Battery

[0033] (1) Preparation of spherical nickel hydroxide precursor doped with yttrium

[0034] Nickel chloride, cobalt sulfate and yttrium sulfate are according to nickel, cobalt, yttrium molar ratio: nickel 95%, cobalt 3%, yttrium 2%, mix the salt solution of nickel cobalt yttrium of 2 mol / liter evenly, preparation concentration is 3 - Potassium hydroxide solution of 5 mol / liter, and the complexing agent for preparing ammonia concentration of 25% ammonia water, and simultaneously injected into the reaction kettle with stirring and dispersing function for chemical precipitation, wherein the flow rate of the salt solution is 5ml / min , the flow rate of potassium hydroxide is 8ml / min, the flow rate of ammonia solution is 5ml / min, the conditions for controlling the chemical reaction are that the pH is in the range of 11-13, and the temperature is at 70°C. Wash unti...