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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

Inactive Publication Date: 2020-01-24
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In previous studies, although the test performance of gold and platinum electrodes is very good, the cost is too high and it is not suitable for large-scale promotion. The stability of nickel as a single metal is only inferior to that of platinum and gold, and it conducts electricity at the same time. The performance is also excellent, and the price is low, it is a good choice

Method used

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  • Foamed nickel self-supporting nickel nanotube super capacitor electrode material and preparation method thereof
  • Foamed nickel self-supporting nickel nanotube super capacitor electrode material and preparation method thereof
  • Foamed nickel self-supporting nickel nanotube super capacitor electrode material and preparation method thereof

Examples

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Embodiment 1

[0047] A kind of preparation method of nickel foam self-supporting nickel nanotube supercapacitor electrode material of the present embodiment, the steps are as follows:

[0048] (1) Foam nickel pretreatment

[0049] Prepare 3×4cm 2 The standard nickel foam is firstly soaked 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, and the nickel foam is taken out and placed in a drying oven for 8 hours at 70°C. spare.

[0050] (2) Preparation of zinc oxide nanorods

[0051] (i) Zinc oxide seed layer: Dissolve 0.01mol of zinc acetate in 100mL of anhydrous methanol, stir for 15min, then immerse the foamed nickel pretreated in step (1), continue ultrasonic stirring for 15min, then take it out and put it in a drying oven at 200 ℃ heating for 1h to obtain a zinc oxide seed layer with a thickness of about 5nm;

[0052] (ii) Zinc oxide gro...

Embodiment 2

[0063] A kind of preparation method of nickel foam self-supporting nickel nanotube supercapacitor electrode material of the present embodiment, the steps are as follows:

[0064] (1) Foam nickel pretreatment: 2.5×2.5cm 2 The standard nickel foam is first soaked 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, and the nickel foam is taken out and dried at 70°C for 8 hours for later use.

[0065] (2) Preparation of zinc oxide nanorods

[0066] With the mixed aqueous solution containing 0.01mol / L zinc nitrate and 0.05mol / L ammonium nitrate as the electrolyte, a three-electrode system is adopted, the foamed nickel after step (1) pretreatment is used as the working electrode, and the platinum electrode is used as the counter electrode. Mercury electrode to reference electrode, at 70°C, 12.5mA / cm 2 Electrodeposition at a constant te...

Embodiment 3

[0077] A kind of preparation method of nickel foam self-supporting nickel nanotube supercapacitor electrode material of the present embodiment, the steps are as follows:

[0078] (1) Foam nickel pretreatment: make 2×2cm 2 The standard nickel foam is first soaked in 3mol / L hydrochloric acid and ultrasonically cleaned for 15 minutes, then ultrasonically cleaned in absolute ethanol solution for at least three times, and finally cleaned in deionized water for 15 minutes, and finally the foam nickel is taken out and dried at 70°C for 8 hours. spare.

[0079] (2) Preparation of zinc oxide nanorods

[0080] (i) ZnO seed layer

[0081] Prepare 0.005mol / L zinc acetate absolute ethanol solution, stir until uniform, soak the nickel foam treated in step (1) for 30 minutes, and then anneal at 350°C in air for 20 minutes to obtain zinc oxide with a thickness of about 5nm seed layer.

[0082] (ii) step (i) is vertically placed in 0.025mol / L zinc nitrate, 0.025mol / L hexamethylenetetramine...

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Abstract

The invention relates to a preparation method of a foamed nickel self-supporting nickel nanotube super capacitor electrode material, which comprises the following steps: pre-treating foamed nickel; growing zinc oxide nanorods on the surface of the pretreated foamed nickel by adopting a hydrothermal method or an electro-deposition method; electrically depositing an elemental nickel layer on the surface of the zinc oxide nanorods to obtain a zinc oxide@nickel core-shell structure; and finally, calcining and etching the zinc oxide@nickel core-shell structure. The preparation process is convenient, simple, green, environmentally friendly and low in cost. The problem that materials contain too many impurities and the operation is complex in a traditional process is solved. A super capacitor energy storage material containing novel nickel nanotubes is constructed from another direction. In addition, the nickel nanotubes are grown on the surface of the foamed nickel to serve as a self-supporting electrode material with good conductivity and a stable structure, the hollow tubular structure can provide a larger specific surface area, and the charge-discharge cycling stability of a whole capacitor is ensured while the conductivity is improved.

Description

technical field [0001] The invention relates to the field of supercapacitor electrode materials, in particular to a nickel foam self-supporting nickel nanotube supercapacitor electrode material and a preparation method thereof. [0002] technical background [0003] A supercapacitor is a new type of energy storage device between traditional capacitors and rechargeable batteries. It not only has the characteristics of fast charging and discharging of capacitors, but also has the energy storage characteristics of batteries. Compared with traditional capacitors: (1) high power density; (2) long cycle life; (3) wide operating temperature limit; (4) maintenance-free; (5) green and environmental protection. Its application is mainly in high-power pulse applications and instantaneous power maintenance, while it can charge and discharge quickly and maintain stability. [0004] The superior performance of supercapacitors depends entirely on the choice of electrode materials. In prev...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/46H01G11/86
CPCH01G11/30H01G11/46H01G11/86Y02E60/13
Inventor 王浩季杰万厚钊汪汉斌张军
Owner HUBEI UNIV
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