A kind of electrochemical preparation method of nickel/nickel hydroxide energy storage electrode material
A technology of nickel hydroxide and energy storage electrodes, applied in the manufacture of hybrid/electric double layer capacitors, nanotechnology for materials and surface science, hybrid capacitor electrodes, etc., can solve problems such as small specific surface area and low conductivity, Achieve the effects of large volume ratio capacitance, low cost, good cycle stability and rate performance
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Embodiment 1
[0025] The preparation method steps of nickel / nickel hydroxide energy storage electrode material in this example are as follows:
[0026] Step 1: Dissolve nickel chloride hexahydrate and sodium hydroxide in ethylene glycol respectively, until completely dissolved to form a solution, mix 100 mL of nickel chloride hexahydrate solution of 0.02 mol / L with sodium hydroxide solution of 0.5 mol / L 100mL was mixed evenly, and 20mL of 85% hydrazine hydrate was added, stirred and mixed evenly, transferred to a water bath reaction pot, and reacted in a water bath under a magnetic field of 0.6T, and kept at 75°C for 0.5h. After the reaction is finished, the reactants are cleaned to obtain nickel nanowires.
[0027] Step 2, ultrasonically disperse the above-mentioned nickel nanowires in ethanol, vacuum filter to obtain a fluffy nickel nanowire film, and press at 10 MPa for 1 min to obtain a dense nickel nanowire film.
[0028] Step 3, cut the above film into a size of 0.5×0.5cm 2 In the t...
Embodiment 2
[0034] Step 1, dissolving nickel chloride hexahydrate and sodium hydroxide in ethylene glycol respectively, until completely dissolved to form a solution, 50 mL of nickel chloride hexahydrate solution of 0.005 mol / L and sodium hydroxide solution of 0.02 mol / L Mix 50 mL evenly, add 10 mL of 85% hydrazine hydrate, stir and mix evenly, transfer to a water bath reaction pot, perform water bath reaction under a 0.4T magnetic field, and keep warm at 80°C for 0.5h. After the reaction is finished, the reactants are cleaned to obtain nickel nanowires.
[0035] Step 2, ultrasonically disperse the above-mentioned nickel nanowires in ethanol, vacuum filter and then dry naturally for 10 minutes, the filter membrane falls off to obtain a fluffy nickel nanowire film, and press at 8 MPa for 5 minutes to obtain a dense nickel nanowire film.
[0036] Step 3, cut the above film into a size of 0.5×0.5cm 2 In the three-electrode system, the thin film is used as the working electrode, mercury / merc...
Embodiment 3
[0038] Step 1: Dissolve nickel chloride hexahydrate and sodium hydroxide in ethylene glycol respectively, until completely dissolved to form a solution, mix 50mL of nickel chloride hexahydrate solution with 0.01mol / L nickel hydroxide solution with 0.1mo / L 100mL was mixed evenly, and 15mL of hydrazine hydrate was added, stirred and mixed evenly, transferred to a water bath reaction pot, and reacted in a water bath under a magnetic field of 0.4T, and kept at 70°C for 1h. After the reaction is finished, the reactants are cleaned to obtain nickel nanowires.
[0039] Step 2, ultrasonically disperse the above-mentioned nickel nanowires in ethanol, vacuum filter to obtain a fluffy nickel nanowire film, and press at 10 MPa for 2 minutes to obtain a dense nickel nanowire film.
[0040] Step 3, cut the above film into a size of 1×1cm 2 In the three-electrode system, the thin film is used as the working electrode, mercury / mercuric oxide is used as the reference electrode, and the platin...
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