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A preparation method of supercapacitor composite electrode material based on nickel foam

A supercapacitor and composite electrode technology, which is applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve the problems of excessive capacitance attenuation and limit the practical application of energy storage devices, and achieve simple methods, maintain transmission, and combine firm effect

Active Publication Date: 2020-08-28
东莞市新熠杰电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But because Co 3 o 4 When in contact with the electrolyte, the active sites are fully exposed, resulting in too fast capacitance decay, limiting its practical application in energy storage devices

Method used

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  • A preparation method of supercapacitor composite electrode material based on nickel foam
  • A preparation method of supercapacitor composite electrode material based on nickel foam
  • A preparation method of supercapacitor composite electrode material based on nickel foam

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A kind of preparation and performance research of cobalt tetroxide / nickel sulfide composite electrode material based on nickel foam, comprising the following steps:

[0027] (1) Dissolve cobalt chloride hexahydrate, ammonium fluoride and urea in 70mL deionized water, the quality of cobalt salt in the solution is 1.75g, the quality of ammonium fluoride is 0.7g, the quality of urea is 2.8g, stir and dissolve Obtain dispersion 1;

[0028] (2) Transfer the dispersion liquid 1 configured in step (1) to the reaction kettle, put foamed nickel (2×3cm 2 ), hydrothermal reaction at 110°C for 6h. The resulting Co on Ni foam based 3 o 4 The precursor was washed three times with deionized water and ethanol, and dried at 60 °C for 6 h;

[0029] (3) Co 3 o 4 The precursor is heat-treated in air for 4 hours at a temperature of 450°C to obtain the Co 3 o 4 electrode material;

[0030] (4) Weigh nickel acetate, thiourea and glutathione, dissolve them in 20mL deionized water, whe...

Embodiment 2

[0033] A kind of preparation and performance research of cobalt tetroxide / nickel sulfide composite electrode material based on nickel foam, comprising the following steps:

[0034] (1) Cobalt chloride hexahydrate, ammonium fluoride and urea are dissolved in 70mL ethanol, the quality of cobalt salt in the solution is 1.75g, the quality of ammonium fluoride is 0.7g, the quality of urea is 2.8g, stir and dissolve to obtain Dispersion 1;

[0035] (2) Transfer the dispersion liquid 1 configured in step (1) to the reaction kettle, put foamed nickel (2×3cm 2 ), hydrothermal reaction at 110°C for 6h. The resulting Co on Ni foam based 3 o 4 The precursor was washed three times with deionized water and ethanol, and dried at 60 °C for 6 h;

[0036] (3) Co 3 o 4 The precursor is heat-treated in air for 4 hours at a temperature of 450°C to obtain the Co 3 o 4 electrode material;

[0037] (4) Weigh nickel acetate, thiourea and glutathione, dissolve them in 20mL deionized water, where...

Embodiment 3

[0041] A kind of preparation and performance research of cobalt tetroxide / nickel sulfide composite electrode material based on nickel foam, comprising the following steps:

[0042] (1) Dissolve cobalt chloride hexahydrate, ammonium fluoride and urea in 70mL deionized water / ethanol mixed solution (the volume ratio of deionized water to ethanol is 1:1), the mass of cobalt salt in the solution is 2.4g, The mass of ammonium fluoride is 0.8g, the mass of urea is 3.2g, stir and dissolve to obtain dispersion 1;

[0043] (2) Transfer the dispersion liquid 1 configured in step (1) to the reaction kettle, put foamed nickel (2×3cm 2 ), hydrothermal reaction at 150°C for 5h. The resulting Co on Ni foam based 3 o 4 The precursor was washed three times with deionized water and ethanol, and dried at 60 °C for 6 h;

[0044] (3) Co 3 o 4 The precursor was heat-treated in air for 2.5 hours at a temperature of 300°C to obtain the Co 3 o 4 electrode material;

[0045] (4) Weigh nickel ac...

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Abstract

The invention belongs to the technical field of preparation of supercapacitor composite electrode materials, and in particular relates to a preparation method of the supercapacitor composite electrodematerial based on foamed nickel. The method comprises the steps of weighing nickel salts, thiourea and glutathione, adding the same into a solvent, and stirring to be uniformly dispersed; further adding Co3O4 electrode material based on the foamed nickel, and heating by water for 8-16h at the temperature of 120-200 DEG C; separately washing acquired products by water and alcohol for three times;and drying to acquire the cobaltosic oxide / nickel sulfide composite electrode material sing the foamed nickel as a substrate. In the preparation method provided by the invention, the thiourea is usedas a sulfur source, and the precipitant method is simple, convenient and relatively small in pollution. The glutathione is used as a reducing agent, so that the original solid micro beams can be converted into hollow micro beams, and the transmission of electrons and ions can be effectively kept. The Nis acquired by the hydrothermal method is more firmly combined with the Co3O4.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrode materials for supercapacitors, and in particular relates to the preparation of a nickel foam-based cobalt tetroxide / nickel sulfide composite electrode material and research on its excellent electrochemical performance. Background technique [0002] Supercapacitor, as a new type of energy storage and conversion device, mainly relies on redox pseudocapacitance and electric double layer to store electric energy. The power density and longer cycle life are expected to be widely used in various fields such as national defense, machinery, and daily life. Therefore, it is of great significance to accelerate the development of supercapacitors. [0003] Currently, the materials used for supercapacitors mainly include carbon-based materials (activated carbon, carbon nanotubes, carbon aerogels, graphene), transition metal hydroxides or oxides, and conductive polymers. In recent years, Co ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/26H01G11/30H01G11/46H01G11/86
CPCH01G11/26H01G11/30H01G11/46H01G11/86Y02E60/13
Inventor 陈敏全威姜德立孟素慈齐越王银涛
Owner 东莞市新熠杰电子科技有限公司