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Nickel-cobalt double hydroxide/NiCo<2>S<4> composite nanomaterial, preparation method therefor, and application of composite nanomaterial as electrode material of supercapacitor

A technology of composite nanomaterials and double hydroxides, applied in hybrid capacitor electrodes, hybrid/electric double layer capacitor manufacturing, nanotechnology, etc., can solve the problems of low capacitance and energy density, achieve good electrochemical performance, growth The effect of large degree of freedom and simple operation

Active Publication Date: 2016-09-21
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The current commercial supercapacitors are mainly carbon materials with high specific surface area. This material mainly stores electric energy based on the principle of electric double layer and has a very high cycle life. However, the capacitance and energy density are relatively low, which is still far from the requirements of practical applications. a certain distance

Method used

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  • Nickel-cobalt double hydroxide/NiCo&lt;2&gt;S&lt;4&gt; composite nanomaterial, preparation method therefor, and application of composite nanomaterial as electrode material of supercapacitor
  • Nickel-cobalt double hydroxide/NiCo&lt;2&gt;S&lt;4&gt; composite nanomaterial, preparation method therefor, and application of composite nanomaterial as electrode material of supercapacitor
  • Nickel-cobalt double hydroxide/NiCo&lt;2&gt;S&lt;4&gt; composite nanomaterial, preparation method therefor, and application of composite nanomaterial as electrode material of supercapacitor

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Embodiment 1

[0033] A kind of nickel-cobalt double hydroxide / NiCo 2 S 4 A method for preparing a composite nanomaterial, comprising the steps of:

[0034] A, cobalt chloride hexahydrate, nickel chloride hexahydrate and hexamethylenetetramine are dissolved in 50mL water respectively, the concentration of cobalt salt in the solution is 0.08 mole / liter, the concentration of nickel salt is 0.04 mole / liter, six The concentration of methylenetetramine is 0.24 mol / liter, and a small piece of clean foam nickel (2cm×3cm) is immersed in the mixed solution, and reacted for 8 hours at 100°C. After cooling, take out the foam nickel sheet, wash it, dry, and prepare A nickel foam sheet loaded with nickel-cobalt double hydroxide nanosheets was obtained;

[0035] B, the foamed nickel sheet that step A is loaded with nickel-cobalt double hydroxide nanosheet is put into autoclave, adds 25mL 0.17 mol / liter thioacetamide solution in the still, with autoclave airtight, heating To 107°C, react for 10 hours. ...

Embodiment 2

[0039] A kind of nickel-cobalt double hydroxide / NiCo 2 S 4 The preparation method of nanocomposite material, comprises the following steps:

[0040] A. Dissolve cobalt nitrate hexahydrate, nickel nitrate hexahydrate and hexamethylenetetramine in 50mL water respectively, the concentration of cobalt salt in the solution is 0.02 mol / liter, the concentration of nickel salt is 0.01 mol / liter, hexamethylene The concentration of base tetramine is 0.06 mol / liter. A small piece of clean foamed nickel (2cm×3cm) is immersed in the mixed solution and reacted for 4 hours at 140°C. After cooling, the foamed nickel piece is taken out, washed and dried to obtain a loaded Nickel foam sheets with nickel-cobalt double hydroxide nanosheets;

[0041] B, the foamed nickel sheet that the nickel-cobalt double hydroxide nanosheet that step A makes is loaded is put in autoclave, adds 25mL 0.1 mol / liter thioacetamide solution in the still, with autoclave airtight, heating to 110°C, and reacted for 5 ...

Embodiment 3

[0043] A kind of nickel-cobalt double hydroxide / NiCo 2 S 4 The preparation method of nanocomposite material, comprises the following steps:

[0044] A. Dissolve cobalt acetate tetrahydrate, nickel acetate tetrahydrate and hexamethylenetetramine in 50mL of water respectively, the concentration of cobalt salt in the solution is 0.2 mole / liter, the concentration of nickel salt is 0.1 mole / liter, hexamethylene The concentration of base tetramine is 0.6 mol / liter. A small piece of clean foamed nickel (2cm×3cm) is immersed in the mixed solution and reacted for 10 hours at 100°C. After cooling, take out the foamed nickel piece, wash it, and dry it to obtain a load. Nickel foam sheets with nickel-cobalt double hydroxide nanosheets;

[0045] B. Put the foamed nickel sheets loaded with nickel-cobalt double hydroxide nanosheets prepared in step A into an autoclave, add 25 mL of 1 mol / liter sodium sulfide solution in the autoclave, and heat the autoclave to 105 °C, react for 10 hours. ...

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Abstract

The invention discloses a nickel-cobalt double hydroxide / NiCo<2>S<4> composite nanomaterial, a preparation method therefor, and an application of the composite nanomaterial as an electrode material of a supercapacitor. Nickel-cobalt double hydroxide nanosheets are prepared firstly by a hydrothermal method; then smaller NiCo<2>S<4> nanosheets are formed on the surfaces of the nickel-cobalt double hydroxide nanosheets through a gaseous phase hydrothermal method; compared with other nanostructures, such as nanowires, nanoparticles and the like, when the NiCo<2>S<4> nanosheets are grown on the nickel-cobalt double hydroxide nanosheets, the mutual agglomeration of the nanosheets can be prevented, and the electrochemical activity of the nanosheets can be taken into full play; and meanwhile, when the composite material is applied as the electrode material of the supercapacitor, the composite material can be used as the electrode material of the pseudocapacitor, and has relatively high specific capacitance and rate charge-discharge property.

Description

technical field [0001] The present invention relates to a kind of nickel-cobalt double hydroxide / NiCo 2 S 4 Composite nanomaterials, their preparation methods and applications as supercapacitor electrode materials. Background technique [0002] In recent years, the development of supercapacitor technology has attracted widespread attention and has been successfully applied in consumer electronics products, energy transportation (electric vehicles, solar energy and wind energy storage), power compensation and other fields, and its market size is rapidly expanding. The development of supercapacitors began in the 1960s, and with the rise of hybrid electric vehicles in the 1990s, it received widespread attention and began to develop rapidly. The storage capacity of supercapacitors for electric energy is between traditional capacitors and secondary batteries. Compared with traditional capacitors, it has higher energy density; compared with secondary batteries, it has a wider op...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/86B82Y40/00B82Y30/00
CPCY02E60/13H01G11/30B82Y30/00B82Y40/00H01G11/86
Inventor 王正华罗乐
Owner ANHUI NORMAL UNIV
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