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A kind of nickel-cobalt double hydroxide/nico2s4 composite nanomaterial, its preparation method and its application as supercapacitor electrode material

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, and operate Simple, easy-to-scale effects

Active Publication Date: 2018-04-13
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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  • A kind of nickel-cobalt double hydroxide/nico2s4 composite nanomaterial, its preparation method and its application as supercapacitor electrode material
  • A kind of nickel-cobalt double hydroxide/nico2s4 composite nanomaterial, its preparation method and its application as supercapacitor electrode material
  • A kind of nickel-cobalt double hydroxide/nico2s4 composite nanomaterial, its preparation method and its application as supercapacitor electrode material

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Effect test

Embodiment 1

[0033] A 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. A small piece of clean nickel foam (2cm×3cm) is immersed in the mixed solution and reacted for 8 hours at 100°C. After cooling, take out the nickel foam sheet, wash it, dry it, and prepare it. A nickel foam sheet loaded with nickel-cobalt double hydroxide nanosheets was obtained;

[0035] B, put the nickel-cobalt double hydroxide nanosheet foam nickel sheet that step A made into the autoclave, add 25mL 0.17 mol / liter thioacetamide solution in the autoclave, seal the autoclave, and heat To 107°C, react for 10 hours. After the reaction...

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 nickel foam (2cm×3cm) is immersed in the mixed solution and reacted at 140°C for 4 hours. After cooling, take out the foam nickel piece, wash it, and dry it to obtain a loaded Nickel foam sheets with nickel-cobalt double hydroxide nanosheets;

[0041] B. Put the nickel-cobalt double hydroxide nanosheet foam nickel sheet loaded in step A into an autoclave, add 25 mL of 0.1 mol / liter thioacetamide solution in the autoclave, seal the autoclave, and heat to 110°C, and reacted for 5 hours. After the reac...

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 25mL 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 / NiCo2S4 composite nanomaterial, its preparation method and its application as a supercapacitor electrode material; the nickel-cobalt double hydroxide nanosheet is firstly prepared by a hydrothermal method, and then Smaller NiCo2S4 nanosheets are formed on the surface of nickel-cobalt double hydroxide nanosheets by gas-phase hydrothermal method. Compared with other nanostructures such as nanowires and nanoparticles, NiCo2S4 nanosheets grow on nickel-cobalt double hydroxide On the nanosheets, it can prevent the agglomeration of the nanosheets, which is conducive to giving full play to its electrochemical activity; when the composite material is used as a supercapacitor electrode material, it can be used as a pseudocapacitive electrode material with high specific capacitance and rate Charge and discharge performance.

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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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/30H01G11/86B82Y40/00B82Y30/00
CPCY02E60/13
Inventor 王正华罗乐
Owner ANHUI NORMAL UNIV
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