Preparation method of nickel ferrite microsphere supercapacitor electrode material

The invention relates to a preparation method of a nickel ferrite microsphere supercapacitor electrode material. The preparation method comprises the following steps: weighing nickel salt and ferric salt, and adding the weighed nickel salt and ferric salt into deionized water for dissolving; mixing urea and ammonium fluoride, adding a mixture into solvent, keeping the molar ratio of the nickel salt to the ferric salt to the urea to the ammonium fluoride at 1 to 2 to (18 to 36) to (9 to 24), continuously stirring to form a clear solution, then transferring the clear solution into a reaction kettle, and placing the reaction kettle in a drying oven for performing a thermostatic reaction; naturally cooling to room temperature after completing a hydrothermal process to obtain a reaction product; performing suction filtration, precipitation, washing and drying to obtain hollow NiFe2O4 microspheres with the diameter being 2 to 3 mum finally; making NiFe2O4 microsphere materials into an electrode by a rolling method,