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A kind of cobalt hydroxide/rgo/nickel hydroxide sandwich flexible electrode material and preparation method thereof

A technology of nickel hydroxide and cobalt hydroxide, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., 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 conductivity

Active Publication Date: 2020-07-24
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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  • A kind of cobalt hydroxide/rgo/nickel hydroxide sandwich flexible electrode material and preparation method thereof
  • A kind of cobalt hydroxide/rgo/nickel hydroxide sandwich flexible electrode material and preparation method thereof

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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 method for preparing a cobalt hydroxide / rGO / nickel hydroxide sandwich-shaped flexible electrode material, which is characterized in that it comprises the following steps: S1: First, the carbon fiber cloth is cleaned by acetone, deionized water and ethanol in sequence, Then carry out drying treatment; S2: use the carbon fiber cloth after drying treatment in step S1 as the base, deposit nickel hydroxide by hydrothermal reaction method, and perform drying treatment; S3: use the carbon fiber cloth deposited with nickel hydroxide obtained in step S2 as the base , deposit rGO by electrodeposition method, and perform drying treatment; S4: use the carbon fiber cloth deposited with rGO / nickel hydroxide obtained in step S3 as the substrate, deposit cobalt hydroxide by hydrothermal reaction method, and perform drying treatment to obtain hydrogen Cobalt oxide / rGO / nickel hydroxide sandwich-like flexible electrode material. The sandwich-shaped flexible electrode material prepared by the method provided by the invention has excellent rate performance, simple process, low cost, and easy industrial promotion.

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 Patents(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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