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Preparation method of flexible fabric supercapacitor electrode material taking graphene/polypyrrole as active substance

A supercapacitor and active material technology, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, etc., can solve the problems of poor cycle performance of supercapacitors and attenuation of capacitance performance, so as to improve space utilization and reduce interface Impedance, the effect of improving utilization

Active Publication Date: 2020-03-27
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the molecular chain of polypyrrole is prone to expand or shrink during the charge and discharge process and be destroyed, the cycle performance of the supercapacitor becomes worse when polypyrrole is used as the electrode material, and the capacitance performance is significantly attenuated.

Method used

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  • Preparation method of flexible fabric supercapacitor electrode material taking graphene/polypyrrole as active substance
  • Preparation method of flexible fabric supercapacitor electrode material taking graphene/polypyrrole as active substance

Examples

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Embodiment 1

[0028] The preparation method of the flexible fabric supercapacitor electrode material using graphene / polypyrrole as the active material of the present embodiment, the steps are as follows:

[0029] (1) Prepare a glutaraldehyde aqueous solution with a concentration of 0.9%, adjust its pH value to 4.5 with hydrochloric acid, and make a carboxymethyl chitosan / viscose blended nonwoven with a carboxymethyl chitosan fiber content of 30% The cloth (2×4cm) was soaked in the glutaraldehyde aqueous solution for 5 minutes and then taken out, placed in an oven at 45° C. for 1.5 hours to cross-link and dry to obtain a cross-linked carboxymethyl chitosan / viscose blended non-woven fabric.

[0030] (2) Immerse the cross-linked carboxymethyl chitosan / viscose blended non-woven fabric into the graphene aqueous dispersion with a concentration of 1mg / ml, take it out after soaking for 2 minutes, and dry it in an oven at 50°C After 3 hours, the graphene / non-woven composite material was obtained aft...

Embodiment 2

[0035] The preparation method of the flexible fabric supercapacitor electrode material using graphene / polypyrrole as the active material of the present embodiment, the steps are as follows:

[0036] (1) Prepare a succinic dialdehyde aqueous solution with a concentration of 0.3%, adjust its pH value to 5 with hydrochloric acid, and make a carboxymethyl chitosan / viscose blended nonwoven with a carboxymethyl chitosan fiber content of 50% The cloth (2×4 cm) was immersed in the succinic dialdehyde aqueous solution for 8 minutes and then taken out, placed in an oven for cross-linking and drying at 60° C. for 1.0 hour to obtain a cross-linked carboxymethyl chitosan / viscose blended non-woven fabric.

[0037] (2) Immerse the cross-linked carboxymethyl chitosan / viscose blended non-woven fabric into the graphene aqueous dispersion with a concentration of 2mg / ml, take it out after soaking for 30 minutes, and dry it in an oven at 80°C After 1 hour, the graphene / non-woven composite material...

Embodiment 3

[0042] The preparation method of the flexible fabric supercapacitor electrode material using graphene / polypyrrole as the active material of the present embodiment, the steps are as follows:

[0043] (1) Prepare an aqueous solution of adipaldehyde with a concentration of 0.45%, adjust its pH value to 4.5 with hydrochloric acid, and prepare a carboxymethyl chitosan / viscose blended nonwoven with a carboxymethyl chitosan fiber content of 50% The cloth (2×4cm) was soaked in the adialdehyde aqueous solution for 5 minutes and then taken out, placed in an oven at 50° C. for cross-linking and drying for 1.2 hours to obtain a cross-linked carboxymethyl chitosan / viscose blended non-woven fabric.

[0044] (2) Immerse the cross-linked carboxymethyl chitosan / viscose blended non-woven fabric into the graphene aqueous dispersion with a concentration of 1.5mg / ml, take it out after soaking for 10 minutes, and place it in an oven at 60°C After drying for 2.5 hours, the graphene / non-woven fabric ...

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Abstract

The invention belongs to the technical field of supercapacitors, and particularly relates to a preparation method of a flexible fabric supercapacitor electrode material taking graphene / polypyrrole asan active substance. The preparation method comprises the following steps: firstly, carrying out swelling crosslinking on carboxymethyl chitosan / viscose blended non-woven fabric; preparing a graphene / non-woven fabric conductive material by adopting an impregnation-drying method, and polymerizing a pyrrole monomer onto the graphene / non-woven fabric conductive material by adopting an in-situ chemical oxidation polymerization method to obtain the flexible fabric supercapacitor electrode material taking graphene / polypyrrole as an active substance. A flexible substrate material adopted by the invention is carboxymethyl chitosan / viscose blended non-woven fabric; wherein carboxymethyl chitosan is a water-soluble polymer material, swelling of carboxymethyl chitosan in a cross-linking agent aqueous solution promotes increase of the specific surface area of the fabric, pores in the fabric can be filled with carboxymethyl chitosan, the space utilization rate of the fabric can be greatly increased, loading of a large number of electroactive substances is facilitated, and carboxymethyl chitosan is an ideal supporting material for the flexible electrode.

Description

technical field [0001] The invention belongs to the technical field of supercapacitors, in particular to a preparation method of a flexible fabric supercapacitor electrode material using graphene / polypyrrole as an active material. Background technique [0002] With the rapid development of the global economy and industrial technology, energy issues have become the focus of attention of countries all over the world, and the development of renewable energy conversion and storage devices is particularly critical. The development of high-performance energy devices to meet the future requirements of high energy density, high power density and long cycle life has always been a research hotspot and focus. Among them, supercapacitor is a new type of electrochemical energy storage device between traditional capacitors and batteries. It has the advantages of fast charge and discharge speed, long cycle life and environmental friendliness. It is considered to be an important choice for ...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/26H01G11/30H01G11/32H01G11/48H01G11/86
CPCH01G11/24H01G11/26H01G11/30H01G11/32H01G11/48H01G11/86Y02E60/13
Inventor 刘红燕潘玮刘斌国陈燕李英华崔铁兵
Owner ZHONGYUAN ENGINEERING COLLEGE
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