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Porous nickel carbide material, preparation method thereof and super capacitor prepared from porous nickel carbide material

A supercapacitor, nickel carbide technology, applied in chemical instruments and methods, hybrid capacitor electrodes, hybrid/electric double-layer capacitor manufacturing, etc., can solve the problems of low freezing point, dangerous operation, complexity, etc., achieve excellent rate performance, easy to enlarge Production, the effect of good specific capacity

Active Publication Date: 2019-11-12
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, sodium chloride aqueous solution has a low freezing point, and its solidification process requires assistance such as liquid nitrogen, and the operation is dangerous and complicated.

Method used

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  • Porous nickel carbide material, preparation method thereof and super capacitor prepared from porous nickel carbide material
  • Porous nickel carbide material, preparation method thereof and super capacitor prepared from porous nickel carbide material
  • Porous nickel carbide material, preparation method thereof and super capacitor prepared from porous nickel carbide material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This embodiment provides a method for preparing a porous nickel carbide material, and the preparation steps are as follows:

[0038] (1) Put 1 part of nickel nitrate, 2 parts of citric acid or its salt, and 1 part of sodium chloride in a beaker, add 86 parts of water and 10 parts of ethanol, stir to dissolve;

[0039] (2) Put the above solution in a 40°C constant temperature oil bath for complexation reaction, and slowly precipitate sodium chloride through solvent evaporation method to obtain a gel-state substance coated with sodium chloride;

[0040] (3) Place the above-mentioned beaker containing the gel-state substance in an oven at 80 °C to promote the further cross-linking reaction of citrate and nickel ions, and the decomposition of part of citrate to obtain a fluffy solid powder material;

[0041] (4) Put the above solid powder material in an atmosphere tube furnace at 250 ℃, and perform high-temperature annealing treatment for 1 h in an inert gas protection to pro...

Embodiment 2

[0045] This embodiment provides a method for preparing a porous nickel carbide material, and the preparation steps are as follows:

[0046] (1) Put 1 part of nickel nitrate, 1 part of nickel chloride, 1 part of citric acid, 1 part of sodium citrate, and 4 parts of sodium chloride in a beaker, add 80 parts of water and 12 parts of ethanol, stir to dissolve;

[0047] (2) Put the above solution in a constant temperature oil bath at 60°C for complexation reaction, and slowly precipitate sodium chloride through solvent volatilization method to obtain a gel-state substance coated with sodium chloride;

[0048] (3) Place the above-mentioned beaker containing the gel-state substance in an oven at 100 °C to promote the further cross-linking reaction of citrate and nickel ions, and the decomposition of part of citrate to obtain a fluffy solid powder material;

[0049] (4) Put the above solid powder material in a 300 °C atmosphere tube furnace, and perform high-temperature annealing trea...

Embodiment 3

[0053] This embodiment provides a method for preparing a porous nickel carbide material, and the preparation steps are as follows:

[0054] (1) Put 1 part of nickel nitrate, 1 part of nickel chloride, 1 part of nickel acetate, 0.5 part of citric acid, 0.5 part of sodium citrate, 0.5 part of ammonium citrate, 0.5 part of potassium citrate, and 8 parts of sodium chloride in In the beaker, add 79 parts of water and 12 parts of ethanol, stir to dissolve;

[0055] (2) Put the above solution in a constant temperature oil bath at 80°C for complexation reaction, and slowly precipitate sodium chloride through solvent evaporation method to obtain a gel-state substance coated with sodium chloride;

[0056] (3) Place the above-mentioned beaker containing the gel-state substance in an oven at 120 °C to promote the further cross-linking reaction of citrate and nickel ions, and the decomposition of part of citrate to obtain a fluffy solid powder material;

[0057] (4) Put the above solid po...

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Abstract

The invention provides a porous nickel carbide material, a preparation method thereof and a super capacitor prepared from the porous nickel carbide material. According to the preparation method of theporous nickel carbide material, nickel nitrate, nickel chloride, nickel sulfate, nickel acetate and other matter are adopted as nickel sources, citric acid and a citrate salt are taken as a complexing agent, sodium chloride is taken as a template, water, ethanol or a mixture of water and ethanol is taken as a solvent, a sol-gel method is adopted, and sodium chloride dissolution, crystallization and redissolution are combined, so that controllable preparation of the porous nickel carbide material is achieved, and further the performance of the super capacitor of the porous nickel carbide material is investigated. The super capacitor which is prepared by using the porous nickel carbide material as a positive electrode material has good specific capacity, multiplying power performance and excellent cycle stability, the super capacitor which is assembled based on the porous nickel carbide electrode material has device specific capacity of 103 F*g<-1> at a current density of 1 A*g<-1> anda capacity retention rate of 66.3% after 6000 circulation circles at 5 A*g<-1>.

Description

technical field [0001] The invention relates to the field of supercapacitor electrode materials, in particular to a porous nickel carbide material, a preparation method and a prepared supercapacitor. Background technique [0002] Porous micro-nano materials have the advantages of high specific surface area, abundant active sites, light weight, etc., and have been widely used in energy storage, photoelectric conversion, catalysis, sensors and other fields. Template method is a general strategy for the preparation of porous micro-nanomaterials. The template method is to use the spatial confinement characteristics of the template itself, and then realize the control of the synthesized nanomaterials, so as to obtain materials with excellent size, shape and structure. The template can be used to control the material when preparing the material, which makes the material preparation process easier and achieves the purpose of optimizing the physical and chemical properties of the m...

Claims

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Application Information

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IPC IPC(8): C01B32/914H01G11/86H01G11/30H01G11/24H01G11/26H01G11/84
CPCC01P2002/72C01P2004/03C01B32/914H01G11/24H01G11/26H01G11/30H01G11/84H01G11/86Y02E60/13
Inventor 卫武涛米立伟叶婉玉王静周坤崔世忠陈卫华
Owner ZHONGYUAN ENGINEERING COLLEGE
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