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Cobalt hydroxide/rGO/nickel hydroxide sandwich-like flexible electrode material and preparation method thereof

A technology of nickel hydroxide and cobalt hydroxide, which is applied in the manufacture of hybrid/electric double layer capacitors and electrodes of hybrid capacitors, can solve the problems of limited application of electrode materials, low material utilization rate, poor rate performance, etc., and achieve easy industrialization. Promotion, excellent rate performance, and the effect of improving electrical conductivity

Active Publication Date: 2019-04-26
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to their low electrical conductivity, problems such as low material utilization and poor rate performance during high-current charging and discharging have limited the practical application of electrode materials.

Method used

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  • Cobalt hydroxide/rGO/nickel hydroxide sandwich-like flexible electrode material and preparation method thereof
  • Cobalt hydroxide/rGO/nickel hydroxide sandwich-like flexible electrode material and preparation method thereof

Examples

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Embodiment 1

[0027] The invention provides a preparation method of cobalt hydroxide / rGO / nickel hydroxide sandwich-shaped flexible electrode material, comprising the following steps:

[0028] S1: First, the carbon fiber cloth is ultrasonically cleaned by acetone, deionized water, and ethanol for 30 minutes, and then dried at 60°C for 25 hours;

[0029] S2: First mix deionized water, nickel chloride hexahydrate, urea, and ammonium fluoride in a mass ratio of 90:3:3:1, stir for 0.5 hours to form a uniform solution, and then pour the solution into the reaction In the kettle, put the carbon fiber cloth dried in step S1 into the reaction kettle, and react at 90°C for 9 hours; after the reaction, wait until the reaction kettle is cooled to room temperature, take out the carbon fiber cloth deposited with nickel hydroxide and wash it several times with deionized water , and finally dried at 60°C for 6 hours;

[0030] S3: Prepare a 0.2mg / L graphene oxide solution, and electrodeposit an rGO layer by...

Embodiment 2

[0035] The invention provides a preparation method of cobalt hydroxide / rGO / nickel hydroxide sandwich-shaped flexible electrode material, comprising the following steps:

[0036] S1: Firstly, the carbon fiber cloth is ultrasonically cleaned by acetone, deionized water, and ethanol for 30 minutes, and then dried at 55°C for 20 hours;

[0037] S2: First mix deionized water, nickel chloride hexahydrate, urea, and ammonium fluoride in a mass ratio of 90:3:3:1, stir for 0.5 hours to form a uniform solution, and then pour the solution into the reaction In the kettle, put the carbon fiber cloth dried in step S1 into the reaction kettle, and react at 100°C for 6 hours; after the reaction, wait for the reaction kettle to cool to room temperature, take out the carbon fiber cloth deposited with nickel hydroxide and wash it several times with deionized water , and finally dried at 60°C for 6 hours;

[0038] S3: Prepare a 0.3mg / L graphene oxide solution, and electrodeposit the rGO layer by...

Embodiment 3

[0043] The invention provides a preparation method of cobalt hydroxide / rGO / nickel hydroxide sandwich-shaped flexible electrode material, comprising the following steps:

[0044] S1: First, the carbon fiber cloth is ultrasonically cleaned by acetone, deionized water, and ethanol for 30 minutes, and then dried at 65°C for 30 hours;

[0045] S2: First mix deionized water, nickel chloride hexahydrate, urea, and ammonium fluoride in a mass ratio of 90:3:3:1, stir for 0.5 hours to form a uniform solution, and then pour the solution into the reaction In the still, put the carbon fiber cloth dried in step S1 into the reaction kettle, and react at 85°C for 5h; , and finally dried at 60°C for 6 hours;

[0046] S3: Prepare a 0.4 mg / L graphene oxide solution, and electrodeposit the rGO layer by cyclic voltammetry on the surface of the carbon fiber cloth deposited with nickel hydroxide after the drying treatment in step S2, wherein the electrodeposition voltage window is -1.2V, cycle 12 ...

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Abstract

The invention provides a preparation method of a cobalt hydroxide / rGO / nickel hydroxide sandwich-like flexible electrode material. The preparation method is characterized by comprising the following steps that S1, firstly, a carbon fiber cloth is subjected to ultrasonic cleaning sequentially through acetone, deionized water and ethanol and then dried; S2, the carbon fiber cloth dried in the step S1serves as a base, nickel hydroxide is deposited through a hydrothermal reaction method, and drying treatment is conducted; S3, the obtained carbon fiber cloth with the deposited nickel hydroxide in the step S2 serves as a base, rGO is deposited through an electrodeposition method, and drying treatment is conducted; and S4, the obtained carbon fiber cloth with the deposited rGO / nickel hydroxide inthe step S3 serves as a base, cobalt hydroxide is deposited through a hydrothermal reaction method, drying treatment is conducted, and the cobalt hydroxide / rGO / nickel hydroxide sandwich-like flexibleelectrode material is obtained. The sandwich-like flexible electrode material prepared through the method has excellent rate performance, in addition, the process is simple, the cost is low, and industrial popularization is easy.

Description

technical field [0001] The invention relates to the field of electrode material preparation, in particular to a method for preparing a cobalt hydroxide / rGO / nickel hydroxide sandwich-shaped flexible electrode material. Background technique [0002] In recent years, with the rapid development of flexible electronics science and the miniaturization technology of electronic products, wearable, foldable, flexible, and portable electronic devices have become more and more popular, and the development of light, thin, flexible, high-performance devices that can provide energy for them Energy storage devices have become a research hotspot in the current academic and industrial circles, and flexible supercapacitors are one of the most promising directions. Traditional fixed-shape batteries limit the development of flexible electronics. In addition, many small wearable smart devices and various micro-implanted devices require that functional devices can be used stably under various de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/36H01G11/86
CPCH01G11/24H01G11/30H01G11/36H01G11/86Y02E60/13
Inventor 陈德志潘梦华舒敏兴曾珍章志明权红英
Owner NANCHANG HANGKONG UNIVERSITY
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