▎ 摘　　要

NOVELTY - Preparing three-dimensional porous nitrogen doped graphene/nickel hydroxide electrode material, comprises e.g. (i) placing thick alloy foil in dilute hydrochloric acid solution, subjecting to chemical de-alloying treatment to obtain nano-porous copper, then washing, and (ii) calcining the nano porous copper, cooling, immersing the calcined nano porous copper in etching solution, etching, then washing to obtain self-supporting three dimensional porous nitrogen doped graphene thin film (I), and (iii) preparing mixed solution, placing graphene thin film (I), allowing to stand, heating, reacting. USE - The nickel hydroxide electrode material is useful for preparing super capacitor electrode (claimed). DETAILED DESCRIPTION - Preparing three-dimensional porous nitrogen doped graphene/nickel hydroxide electrode material, comprises (i) placing 80-120 mu m thick alloy foil in 0.01-0.3M dilute hydrochloric acid solution at room temperature, where the amount of copper and manganese is 30% and 70% respectively, then subjecting to chemical de-alloying treatment for 20-120 minutes to obtain nano-porous copper, washing with deionized water, then washing with absolute ethanol, and vacuum drying the washed nano porous copper foil at room temperature, and (ii) placing the nano porous copper in a quartz boat, placing the quartz boat in an outer area of furnace of the reaction tube, introducing argon gas and hydrogen gas, where the flow rate of argon gas and hydrogen gas is 500:200, then heating the furnace to 700-1000 degrees C, moving quickly the boat to the constant temperature area in middle of the reaction tube, calcining for 1-3 hours, inletting acetylene, ammonia gas, hydrogen gas and argon gas at a flow ratio of 1-50:5-50:500:200, calcining for 1-5 minutes, after calcination, moving quickly the boat from the constant temperature area in middle of the reaction tube to outside of the furnace, cooling quickly the sample to room temperature under argon gas atmosphere, taking out the sample from the tubular furnace, immersing the calcined nano porous copper in etching solution containing ferric chloride, hydrochloric acid and water in a molar ratio of 10 g:10 ml:100 ml, and etching for 10-24 hour, taking out the copper sample, sequentially washing the copper sample with deionized water and alcohol, then drying to obtain self-supporting three dimensional porous nitrogen doped graphene thin film (I), and (iii) preparing mixed solution using nickel chloride hexahydrate, urea and water in a molar ratio of 0.5-0.7 g:1.1-1.3 g:70-90 ml, transferring the mixed solution into polytetrafluoroethylene liner reaction kettle, placing the graphene thin film (I), allowing to stand for 1-3 hours, heating to 70-120 degrees C in a vacuum drying box, reacting for 4-20 hours, cooling the reaction kettle to room temperature, taking out the self supporting film (I) from the reaction kettle, then washing with deionized water and alcohol, and drying.