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Zinc cobaltate nanorod/foam nickel composite electrode, preparation method thereof and application thereof

A composite electrode and nickel foam technology, used in capacitor electrodes, circuits, capacitors, etc., can solve the problems of single electrode structure, metal current collector and material conductivity, poor contact, small electrode damage surface area, etc., to increase the contact area, Conducive to the cycle performance, the production process is simple and easy to implement

Inactive Publication Date: 2012-09-12
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although supercapacitors have a high power density, it is not difficult to find in the research that the capacitance and energy density of supercapacitors are extremely low under high power conditions. The reason is that the electrode itself has a single structure and the conductivity of metal current collectors and materials , poor contact, small surface area due to large damage to electrodes during charging and discharging, etc., which greatly restricts its greater development in the future of electric vehicles

Method used

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  • Zinc cobaltate nanorod/foam nickel composite electrode, preparation method thereof and application thereof
  • Zinc cobaltate nanorod/foam nickel composite electrode, preparation method thereof and application thereof
  • Zinc cobaltate nanorod/foam nickel composite electrode, preparation method thereof and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] ① Dissolve zinc nitrate and cobalt nitrate in deionized water at a concentration of 0.017 mol / L and 0.033 mol / L at room temperature through thorough stirring to make solution A, and mix 3 to 4 pieces of cut foam Nickel sheet (such as figure 1 shown) soaked in the solution;

[0029] ② Dissolve oxalic acid in deionized water at a concentration of 0.3 mol / L by fully stirring at room temperature to make solution B; (the medicines used are all purchased directly, and the volume ratio of solutions A and B is 3:2)

[0030] ③ Add solution A and nickel foam into a three-necked flask, heat in a reflux reactor until the temperature stabilizes at 80°C, and stir at an appropriate speed;

[0031] ④ Add the oxalic acid solution with a concentration of 0.2mol / L dropwise into the flask, and react at 80°C for 2 hours; Nickel sheets grow nanostructure precursors.

[0032] ⑤Take out the nickel sheet, wash and dry it, and put it into the muffle furnace for calcination. Annealed at 300°C...

Embodiment 2

[0034] ① Dissolve zinc nitrate and cobalt nitrate in deionized water at a concentration of 0.008 mol / L and 0.017 mol / L at room temperature through thorough stirring to make solution A, and mix 3 to 4 pieces of cut foam The nickel sheet is soaked in the solution;

[0035] ② Dissolve oxalic acid in deionized water at a concentration of 0.3 mol / L by fully stirring at room temperature to make solution B; (the medicines used are all purchased directly, and the volume ratio of solutions A and B is 3:2)

[0036] ③Add solution A and nickel foam into a three-necked flask, heat in a reflux reactor until the temperature stabilizes at 120°C, and stir at an appropriate speed;

[0037] ④ Add the oxalic acid solution with a concentration of 0.2mol / L into the flask dropwise and react at 120°C for 2 hours; the purpose of the oxalic acid solution is to make the reaction solution acidic. Nickel sheets grow nanostructure precursors.

[0038] ⑤Take out the nickel sheet, wash and dry it, and put ...

Embodiment 3

[0040] ① Dissolve zinc nitrate and cobalt nitrate in deionized water at a concentration of 0.034 mol / L and 0.066 mol / L at room temperature through thorough stirring to make solution A, and mix 3 to 4 pieces of cut foam The nickel sheet is soaked in the solution;

[0041] ② Dissolve oxalic acid in deionized water at a concentration of 0.3 mol / L by fully stirring at room temperature to make solution B; (the medicines used are all purchased directly, and the volume ratio of solutions A and B is 3:2)

[0042] ③Put solution A and nickel foam into a three-necked flask, heat in a reflux reactor until the temperature stabilizes at 150°C, and stir at an appropriate speed;

[0043] ④ Add the oxalic acid solution with a concentration of 0.2mol / L into the flask dropwise, and react at 150°C for 2 hours; Nickel sheets grow nanostructure precursors.

[0044] ⑤Take out the nickel sheet, wash and dry it, and put it into the muffle furnace for calcination. Annealed at 300°C for 120 minutes. ...

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Abstract

The invention provides a zinc cobaltate nanorod / foam nickel composite electrode, a preparation method thereof and application thereof. According to the method, a foam nickel plate is immersed in a mixed solution of zinc nitrate and cobalt nitrate, heating and heat preservation are carried out in order, an oxalic acid solution is added dropwise, reaction is carried out until the foam nickel grows a nanostructured precursor, the foam nickel is removed, and cleaning, drying and calcining are carried out in order to obtain the zinc cobaltate nanorod / foam nickel composite electrode. The composite electrode has properties of one-dimensional zinc cobaltate nano material with a large specific surface area and porous foam nickel, a contact area with an electrolyte is effectively increased, the electrode material is more fully involved in an electrochemical reaction, the composite electrode obtained through the reaction has a good electrochemical property and is applied in a super capacitor, the performance of a present capacitor is greatly raised, production process is simple, and the electrode is easy to be applied to the actual mass production.

Description

technical field [0001] The invention belongs to the field of new-generation energy storage, and in particular relates to a high-capacity supercapacitor with zinc cobaltate nanorod / foam nickel composite structure. Background technique [0002] With the rapid development of communication, electronic equipment, automobile industry and space technology, the problem of international energy shortage has become increasingly prominent, and all countries are stepping up the development and research of new energy. In the field of next-generation energy storage, supercapacitors and lithium-ion batteries are indispensable components, and are rapidly being widely used in mobile phones, notebook computers and military equipment. The ever-expanding field of electric vehicles will bring more benefits to supercapacitors. Big room for development. Compared with lithium-ion batteries, supercapacitors have huge advantages and outstanding characteristics in terms of power that other energy stor...

Claims

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Application Information

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IPC IPC(8): H01G9/04H01G9/042
CPCY02E60/13
Inventor 陈娣刘彬沈国震刘伯阳
Owner HUAZHONG UNIV OF SCI & TECH
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