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Carbon quantum dot-polyaniline/carbon fiber integrated composite material and its preparation method and application

A technology of carbon quantum dots and composite materials, which is applied in the field of new polymer materials and new energy, can solve the problems of high resistance and poor cycle stability, achieve high conductivity, high stability, and reduce energy loss.

Active Publication Date: 2018-05-15
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when pure polyaniline is used as a supercapacitor electrode material, its own resistance is high, and because the molecular chain of polyaniline is damaged during the doping / dedoping process, the cycle stability is poor, so it is necessary to improve the polyaniline electrode material. conductivity

Method used

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  • Carbon quantum dot-polyaniline/carbon fiber integrated composite material and its preparation method and application
  • Carbon quantum dot-polyaniline/carbon fiber integrated composite material and its preparation method and application
  • Carbon quantum dot-polyaniline/carbon fiber integrated composite material and its preparation method and application

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Embodiment 1

[0035] The schematic diagram of the microstructure of the carbon quantum dot-polyaniline / carbon fiber integrated nano-composite material described in the present invention, please refer to the attached description for details. figure 1 . As shown in the figure, the carbon quantum dot-polyaniline / carbon fiber integrated composite material shows that polyaniline nanowires grow on the surface of carbon fibers and are connected to each other to form a grid structure. The diameter of polyaniline nanowires ranges from 80-160nm, and the length The range is 1.0-1.5 μm, and the surface of each nanowire has a large number of rough and small protrusions; carbon quantum dots are evenly distributed on the inner layer and surface of polyaniline nanowires, and the diameter of carbon quantum dots ranges from 5-7nm.

Embodiment 2

[0037] The preparation process flow diagram of the water-soluble carbon quantum dots described in the present invention, please refer to the attached description figure 2 , wherein, (A) is the preparation process flow diagram of preparing carbon quantum dots by electrochemical oxidation method, wherein, (1) potassium dihydrogen phosphate aqueous solution, (2) electrochemical workstation, (3) platinum plate electrode, (4) saturated Calomel electrode, (5) graphite rod, (6) water / dihydrogen phosphate ion; (B) carbon quantum dot suspension after ultrasonic treatment; (C) ultrafiltration membrane filtration treatment and phosphomolybdic acid surface modification After the agent reflux activation treatment, the obtained water-soluble carbon quantum dot solution; (D) transmission electron microscope image of the water-soluble carbon quantum dot.

[0038] Specific steps are as follows:

[0039] The light-assisted electrochemical oxidation method: the concentration range of the potas...

Embodiment 3

[0041] Firstly, the carbon fiber substrate is cleaned, and then the cleaned carbon fiber is used as the working electrode, the platinum sheet is used as the counter electrode, the saturated calomel electrode is used as the reference electrode, and aniline, sulfuric acid, and carbon quantum dots are used as the electrolyte solution. The chemical polymerization method forms seed crystal polymerization on the surface of carbon quantum dots, and conducts photoelectric polymerization reaction within a set potential range to form a polyaniline film with 3D grid nanowire characteristics, and prepares carbon quantum dots-polyaniline / carbon fiber integrated composite Material.

[0042] Specific steps are as follows:

[0043] The photoelectrochemical polymerization method of quantum dot hybridization: the electrolyte solution, the carbon quantum dot concentration range is 0.001M; the aniline concentration range is 0.1M, and the sulfuric acid concentration is 1.0M; the cyclic voltammetry...

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Abstract

The invention discloses a carbon quantum dots-polyaniline / carbon fiber integrated composite material, its preparation method and application. According to the invention, the polymerizable aniline monomer acts together with the conductive carbon quantum dots under an integrated reaction to form a carbon quantum dots-polyaniline integrated composite material. The carbon quantum dots-polyaniline nano-wire composite materials are directly grown on the surface of a carbon fiber's conductive substrate and are connected to each other to form a 3D mesh structure. The carbon quantum dots are evenly distributed in the inner surface of the polyaniline nanometer array, and the carbon quantum dots-polyaniline / carbon fiber integrated composite materials can be directly used as super capacitor's electrode materials free of non-adhesive agent to achieve the storage of electrochemical energy. The existence of carbon quantum dots not only improves the conductivity of polyaniline nanometer array material, but also provides favorable support for polyaniline molecules, strengthens the mechanical strength of polyaniline, slows down the damage degree of its main chain in a long cycle and enhances the cycle life of polyaniline electrode materials.

Description

technical field [0001] The invention relates to a carbon quantum dot-polyaniline / carbon fiber integrated composite material, a preparation method thereof, and an application of supercapacitor electrochemical energy storage, belonging to the field of new polymer materials and new energy sources. Background technique [0002] Facing problems such as the depletion of chemical energy, increasingly serious environmental pollution, and the intensifying greenhouse effect, the development of new energy development, energy saving, emission reduction, and environmental protection has become an extremely important and urgent issue for human beings. The new energy industry is playing an increasingly important role in the national economy. With the rapid development of wind power generation, photovoltaic power generation, mobile electronic equipment and other fields, the development of high-performance energy storage devices with high energy density, high power density and long cycle lif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/26H01G11/30H01G11/48H01G11/86
CPCY02E60/13
Inventor 谢一兵赵志超
Owner SOUTHEAST UNIV
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