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Preparation method of quaternary carbon fiber cloth/graphene/tricobalt tetraoxide/polyaniline composite electrode material

A technology of cobalt tetroxide and carbon fiber cloth, which is used in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, etc., can solve the problems of low energy density, poor electrical conductivity, limited specific capacitance, etc. Easy-to-operate effects

Inactive Publication Date: 2017-03-22
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a two-dimensional carbon material, graphene has the advantages of high specific surface area, high electrical conductivity, and excellent electrochemical and mechanical properties, but its specific capacitance is limited and its energy density is low.
As a transition metal oxide, tricobalt tetroxide has a theoretical specific capacitance as high as 3560F / g, but poor conductivity
As a conductive polymer, polyaniline has the advantages of high theoretical specific capacitance, strong conductivity, easy synthesis, and environmental friendliness, but its stability is poor.

Method used

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  • Preparation method of quaternary carbon fiber cloth/graphene/tricobalt tetraoxide/polyaniline composite electrode material

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Embodiment 1

[0033] A preparation method of quaternary carbon fiber cloth / graphene / cobalt tetroxide / polyaniline composite electrode material, comprising the following steps:

[0034] Step 1. Take the carbon fiber cloth and ultrasonically clean it in absolute ethanol for 20 minutes, then rinse it with deionized water for 3 times, and then put it in a vacuum drying oven to dry at 60°C for 8 hours for later use;

[0035] Step 2. Take 1 mg / mL graphene oxide dispersion as the electrochemical deposition solution. In the three-electrode electrochemical workstation system, use carbon fiber cloth as the substrate (working electrode), Pt sheet as the counter electrode, and Ag / AgCl electrode As a reference electrode, by cyclic voltammetry, react for 10 cycles at a voltage range of -1.4-0.6V, and deposit graphene oxide on carbon fiber cloth to obtain a carbon fiber cloth / graphene composite;

[0036] Step three, the CoCl 2 , ammonium fluoride, urea and water are formulated into a uniform solution in t...

Embodiment 2

[0040] A preparation method of quaternary carbon fiber cloth / graphene / cobalt tetroxide / polyaniline composite electrode material, comprising the following steps:

[0041] Step 1. Take the carbon fiber cloth and ultrasonically clean it in absolute ethanol for 20 minutes, then rinse it with deionized water for 3 times, and then put it in a vacuum drying oven to dry at 60°C for 8 hours for later use;

[0042] Step 2. Take 3 mg / mL graphene oxide dispersion as the electrochemical deposition solution. In the three-electrode electrochemical workstation system, use carbon fiber cloth as the substrate (working electrode), Pt sheet as the counter electrode, and Ag / AgCl electrode As a reference electrode, by cyclic voltammetry, react for 9 cycles in the voltage range of -1.4-0.6V, deposit graphene oxide on carbon fiber cloth, and obtain carbon fiber cloth / graphene composite;

[0043] Step three, the CoCl 2 , ammonium fluoride, urea and water are formulated into a uniform solution in the ...

Embodiment 3

[0047] A preparation method of quaternary carbon fiber cloth / graphene / cobalt tetroxide / polyaniline composite electrode material, comprising the following steps:

[0048] Step 1. Take the carbon fiber cloth and ultrasonically clean it in absolute ethanol for 20 minutes, then rinse it with deionized water for 3 times, and then put it in a vacuum drying oven to dry at 60°C for 8 hours for later use;

[0049] Step 2. Take 5 mg / mL graphene oxide dispersion as the electrochemical deposition solution. In the three-electrode electrochemical workstation system, the carbon fiber cloth is used as the substrate (working electrode), the Pt sheet is used as the counter electrode, and the Ag / AgCl electrode is As a reference electrode, by cyclic voltammetry, 8 cycles were reacted at a voltage range of -1.4-0.6V, and graphene oxide was deposited on carbon fiber cloth to obtain a carbon fiber cloth / graphene composite;

[0050] Step three, the CoCl 2 , ammonium fluoride, urea and water are form...

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Abstract

The invention discloses a preparation method of a quaternary carbon fiber cloth / graphene / tricobalt tetraoxide / polyaniline composite electrode material. The method comprises the following process steps of firstly depositing graphene on carbon fiber cloth by taking the carbon fiber cloth as a substrate through an electrodeposition method; synthesizing a regular tricobalt tetraoxide nanowire on the carbon fiber cloth / graphene through a hydrothermal-pyrolysis method; and finally coating the surface of the tricobalt tetraoxide nanowire with a layer of conductive polyaniline through an electric polymerization method to obtain the quaternary carbon fiber cloth / graphene / tricobalt tetraoxide / polyaniline composite electrode material. The preparation method has the advantages that (1) the method is simple, easy to operate and good in repeatability; (2) the reaction time is shortened, the reaction energy is saved and the work efficiency is improved; and (3) the capacitance performance of the composite electrode material is improved by using a synergistic effect of an electric double-layer capacitor and a faraday capacitor, and the composite electrode material has a wide application prospect in the aspect of a super-capacitor electrode material.

Description

technical field [0001] The invention belongs to the field of supercapacitor electrode materials, and in particular relates to a preparation method of a quaternary carbon fiber cloth / graphene / cobalt tetroxide / polyaniline composite electrode material. Background technique [0002] As a new type of electrochemical energy storage element, supercapacitors have emerged at the historic moment due to their characteristics of fast charge and discharge, good voltage memory, high power output, long cycle life and wide working temperature limit. Electrode material is an important part of supercapacitor, and its performance plays a vital role in the capacitance of the whole supercapacitor. As a two-dimensional carbon material, graphene has the advantages of high specific surface area, high electrical conductivity, and excellent electrochemical and mechanical properties, but its specific capacitance is limited and its energy density is low. As a transition metal oxide, tricobalt tetroxid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/36H01G11/40H01G11/46H01G11/48H01G11/86
CPCY02E60/13H01G11/24H01G11/30H01G11/36H01G11/40H01G11/46H01G11/48H01G11/86
Inventor 戴亚堂王伟张海英张欢鲁静华蒲琳钰
Owner SOUTHWEAT UNIV OF SCI & TECH
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