Foamed nickel self-supporting nickel nanotube super capacitor electrode material and preparation method thereof
A technology for supercapacitors and electrode materials, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors. cheap effect
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[0046] Example 1
[0047] The preparation method of the foamed nickel self-supporting nickel nanotube supercapacitor electrode material of this embodiment includes the following steps:
[0048] (1) Foam nickel pretreatment
[0049] Make 3×4cm 2 The nickel foam of specifications is first immersed in 3mol / L hydrochloric acid and ultrasonically cleaned for 15 minutes, then ultrasonically cleaned in absolute ethanol for at least three times, and finally cleaned in deionized water for 15 minutes. Take out the foamed nickel and place it in a drying oven at 70°C for 8 hours. spare.
[0050] (2) Preparation of zinc oxide nanorods
[0051] (i) Zinc oxide seed layer: Dissolve 0.01 mol of zinc acetate in 100 mL of anhydrous methanol, stir for 15 minutes, immerse the foamed nickel after step (1) pretreatment in it, continue to ultrasonically stir for 15 minutes, and then take it out and put it in a drying box 200 Heat at ℃ for 1h to obtain a zinc oxide seed layer with a thickness of about 5nm;
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Example Embodiment
[0062] Example 2
[0063] The preparation method of the foamed nickel self-supporting nickel nanotube supercapacitor electrode material of this embodiment includes the following steps:
[0064] (1) Foam nickel pretreatment: prepare 2.5×2.5cm 2 The nickel foam of specifications is first immersed in 3mol / L hydrochloric acid and ultrasonically cleaned for 15 minutes, then ultrasonically cleaned in absolute ethanol for at least three times, and finally cleaned in deionized water for 15 minutes. The nickel foam is taken out and placed in a drying oven at 70°C for 8 hours for use.
[0065] (2) Preparation of zinc oxide nanorods
[0066] Using a mixed aqueous solution containing 0.01 mol / L zinc nitrate and 0.05 mol / L ammonium nitrate as the electrolyte, using a three-electrode system, using the foamed nickel pretreated in step (1) as the working electrode, and the platinum electrode as the counter electrode, saturated Mercury electrode to reference electrode, at 70℃, 12.5mA / cm 2 Electrodepos...
Example Embodiment
[0076] Example 3
[0077] The preparation method of the foamed nickel self-supporting nickel nanotube supercapacitor electrode material of this embodiment includes the following steps:
[0078] (1) Foam nickel pretreatment: make 2×2cm 2 The nickel foam of specifications is first immersed in 3mol / L hydrochloric acid and ultrasonically cleaned for 15 minutes, then ultrasonically cleaned in anhydrous ethanol solution for at least three times, and finally cleaned in deionized water for 15 minutes. Finally, the foam nickel is taken out and placed in a drying oven at 70°C for 8 hours. spare.
[0079] (2) Preparation of zinc oxide nanorods
[0080] (i) Zinc oxide seed layer
[0081] Prepare 0.005mol / L zinc acetate absolute ethanol solution, stir until uniform, soak the foamed nickel treated in step (1) for 30min, and then anneal it in the air at 350℃ for 20min to obtain zinc oxide with a thickness of about 5nm Seed layer.
[0082] (ii) Put the foamed nickel with the seed layer grown in step (...
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