Electrode material for supercapacitor and preparation method and application thereof

A technology for supercapacitors and electrode materials, applied in the direction of hybrid capacitor electrodes, etc., can solve the problems of agglomeration, unfavorable use of supercapacitor materials, and high cost, and achieve the effects of low resistivity, multiple reactive sites, and easy operation.

Active Publication Date: 2020-08-14
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the specific capacitance of supercapacitors can be improved by combining highly conductive materials with active materials, the cost is too high and agglomeration often occurs during the preparation process, which is not conducive to the use of supercapacitor materials.

Method used

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  • Electrode material for supercapacitor and preparation method and application thereof
  • Electrode material for supercapacitor and preparation method and application thereof
  • Electrode material for supercapacitor and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A method for preparing electrode materials for supercapacitors includes the following steps:

[0039] (1) Pretreatment of foamed copper: Cut the foamed copper into 1cm*3cm, put the foamed copper into 1mol / L hydrochloric acid and sonicate for 10 minutes, take it out and wash it with deionized water several times, and then put it in acetone for 3 minutes of sonication. Finally, the foamed copper was sonicated 2-3 times with absolute ethanol and deionized water, and dried in a vacuum drying oven at 50°C;

[0040] (2) Put the pretreated foamed copper in a uniform mixed solution of 16mL of sodium hydroxide (10mol / L) and 44mL of ammonium persulfate (0.9mol / L), react for 20 minutes, and then use anhydrous ethanol and Deionized water was sonicated for 2-3 times and dried in a drying box at 50°C to obtain a copper hydroxide nanowire precursor material based on foamed copper.

[0041] (3) Place the prepared copper hydroxide nanowire precursor based on foamed copper in a mixed solution ...

Embodiment 2

[0050] A method for preparing electrode materials for supercapacitors includes the following steps:

[0051] (1) Pretreatment of foamed copper: Cut the foamed copper into 3cm*4cm, put the foamed copper into 1mol / L hydrochloric acid and sonicate for 10 minutes, take it out and wash it with deionized water several times, and then put it in acetone and sonicate for 3 minutes. Finally, the foamed copper was sonicated 2-3 times with absolute ethanol and deionized water, and dried in a vacuum drying oven at 50°C;

[0052] (2) Put the pretreated foamed copper in a homogeneous mixed solution of 16mL of sodium hydroxide (10mol / L) and 44mL of ammonium persulfate (0.9mol / L), react for 20 minutes, and then use absolute ethanol. Ultrasound with deionized water for 2-3 times, and dry in a drying box at 50°C to obtain a copper hydroxide nanowire precursor material based on foamed copper.

[0053] (3) Place the prepared copper hydroxide nanowire precursor based on foamed copper in a mixed solution ...

Embodiment 3

[0056] A method for preparing electrode materials for supercapacitors includes the following steps:

[0057] (1) Pretreatment of foamed copper: Cut the foamed copper into 1cm*3cm, put the foamed copper into 1mol / L hydrochloric acid and sonicate for 10 minutes, take it out and wash it with deionized water several times, and then put it in acetone for 3 minutes of sonication. Finally, the foamed copper was sonicated 2-3 times with absolute ethanol and deionized water, and dried in a vacuum drying oven at 50°C;

[0058] (2) Place the pretreated foamed copper in a homogeneous mixed solution of 16mL of sodium hydroxide (10mol / L) and 44mL of ammonium persulfate (0.9mol / L), react for 20 minutes, and then use anhydrous ethanol and Deionized water was sonicated for 2-3 times and dried in a drying box at 50°C to obtain a copper hydroxide nanowire precursor material based on foamed copper.

[0059] (3) Place the prepared copper hydroxide nanowire precursor based on foamed copper in a mixed sol...

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Abstract

The invention relates to an electrode material for a supercapacitor and a preparation method and application of the electrode material. A wet chemical method is used for forming uniform copper hydroxide nanowires on the surface of foamy copper, then the copper hydroxide nanowires are used as a matrix and a copper source, and copper-doped nickel-cobalt bimetal sulfide is formed through a two-step hydrothermal method; the foamy copper is used as a rapid channel for electron transmission, so that the charge transmission rate of a current collector and an active material is improved, and the electrode material has relatively high charge transmission efficiency; the active material uniformly coats the copper hydroxide nanowire through the hydrothermal method, so that the mechanical stability ofthe electrode material is remarkably improved, and the cycle service life of the electrode material is remarkably prolonged.

Description

Technical field [0001] The invention belongs to the field of supercapacitor electrode materials, and particularly relates to an electrode material for supercapacitors and a preparation method and application thereof. Background technique [0002] With the rapid advancement of science and technology caused by the rapid development of science and technology, various new electronic technology products and environmentally friendly vehicles have quickly entered people’s daily lives. Therefore, there is an urgent need to meet people’s daily use with high Power energy density, long cycle life and energy storage devices that can quickly serve as points are being studied. Supercapacitor is a new type of energy storage device between secondary battery and conventional capacitor. It has the dual functions of battery and capacitor. It has instantaneous large current discharge, fast charge and discharge speed, long service life, environmental protection, and performance. Features such as exc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/26H01G11/30H01G11/46
CPCH01G11/24H01G11/26H01G11/30H01G11/46Y02E60/13
Inventor 朱挺刘亚东曾伟
Owner CENT SOUTH UNIV
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