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Preparation method of graphene/polyethylenedioxythiophene composite fiber assembly body

A technology of ethylenedioxythiophene and composite fibers, applied in the field of materials, can solve the problems that conventional materials cannot meet people's needs, and achieve the effects of short production cycle, convenient operation and improved diffusion

Active Publication Date: 2019-08-02
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the existing technology and solving the problem that conventional materials cannot meet people's needs, the present invention provides a preparation method of graphene / polyethylenedioxythiophene composite fiber assembly

Method used

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  • Preparation method of graphene/polyethylenedioxythiophene composite fiber assembly body
  • Preparation method of graphene/polyethylenedioxythiophene composite fiber assembly body
  • Preparation method of graphene/polyethylenedioxythiophene composite fiber assembly body

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Experimental program
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Effect test

Embodiment 1

[0027] (1) Preparation of graphene precursor: using 325 mesh graphite powder as raw material, graphene oxide was prepared according to the Hummers method. Add 10.0mL hydrogen peroxide (30.0%) to 100.0mL 2.0mg / ml graphene oxide aqueous solution, stir vigorously, and react at 100.0°C for 4.0h to obtain graphene oxide nanosieve; (2) graphene / polyethylenedioxythiophene Preparation of (PEDOT) composite fiber assembly: uniformly mix graphene oxide nanosieve, PEDOT:PSS and sodium ascorbate, wherein the concentration of graphene oxide is 3.0mg / mL, the mass ratio of graphene oxide to PEDOT:PSS, sodium ascorbate All are 1:1. Add 150.0uL of 1.0M sulfuric acid to 2.0mL of the above mixture, shake vigorously until the solution gels, use a vacuum pump to remove air bubbles, inject the gelled mixture into the capillary, and conduct a hydrothermal reaction at 90.0°C for 3.0h. Cool to room temperature, take out the graphene / PEDOT:PSS gel fiber, soak with concentrated sulfuric acid to remove m...

Embodiment 2

[0030](1) Graphene precursor preparation: with 12000 order graphite powders as raw material, according to the Hummers method, the graphene oxide of high oxidation, small size (1.0-2.0 μm) is obtained; (2) Graphene / polyethylenedioxythiophene ( Preparation of PEDOT) composite fiber assembly: the above-mentioned small-sized high graphene oxide and PEDOT:PSS were uniformly mixed, wherein the concentration of graphene oxide was 9.0 mg / mL, and the mass ratio of graphene oxide to PEDOT:PSS was 2:1. Add 100.0uL of 2.0M sulfuric acid to 2.0mL of the above mixture, shake vigorously until the solution gels, use a vacuum pump to remove air bubbles, inject the gelled mixture into a capillary, and conduct a hydrothermal reaction at 100.0°C for 6.0h. Cool to room temperature, take out the graphene oxide / PEDOT:PSS gel fiber; soak with concentrated sulfuric acid to remove most of the PSS, then wash with deionized water to obtain the graphene oxide / PEDOT gel fiber; soak the obtained composite fi...

Embodiment 3

[0033] (1) Preparation of graphene precursor: using 325 mesh graphite powder as raw material, graphene oxide was prepared according to the Hummers method, and a small size (1.0-2.0 μm) graphene oxide was obtained by ultrasonication for 15.0 minutes using a cell pulverizer; (2) Graphite Preparation of ene / polyethylenedioxythiophene (PEDOT) composite fiber assembly: uniformly mix the above-mentioned small-sized graphene and PEDOT:PSS, wherein the concentration of graphene oxide is 8.0mg / mL, and the concentration of graphene oxide and PEDOT:PSS The mass ratio is 1:2. Add 350.0uL of 0.5M sulfuric acid to 2.0mL of the above mixture, shake vigorously until the solution gels, use a vacuum pump to remove air bubbles, inject the gelled mixture into the capillary, and conduct a hydrothermal reaction at 70.0°C for 5.0h. Cool to room temperature, take out graphene oxide / PEDOT:PSS gel fiber; Soak with concentrated sulfuric acid to remove most of PSS, wash with deionized water again, obtain...

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Abstract

The invention relates to a preparation method of a graphene / polyethylenedioxythiophene composite fiber assembly body, and belongs to the fields of materials and electrochemistry. The composite material takes oxidized graphene and PEDOT:PSS as raw materials, and the raw materials are assembled into a dual-network porous composite fiber by hydrothermal reaction. Compared with the prior art, types ofgraphene precursors of the graphene / polyethylenedioxythiophene composite fiber assembly body are taken into full considerwtion, the new ideal of assembling graphene and polyethylenedioxythiophene together is provided, and the composite fiber porous microstructure and conductive characteristics are regulated effectively. The composite fiber can be directly used as an electrode of fiber super capacitor, as well as a high conductive porous carrier to bear other high-activity materials. The method is low inc cost, convenient to operate, short in production period and easy to realize industrial production.

Description

technical field [0001] The invention belongs to the field of materials and electrochemistry, and relates to a supercapacitor composite fiber electrode material, and more specifically to a preparation method of a graphene / polyethylenedioxythiophene composite fiber assembly. Background technique [0002] The rapid development of wearable electronics and portable electronic devices has promoted the development of corresponding energy storage devices in the direction of miniaturization, flexibility, light weight, high energy density and power density. Compared with traditional capacitors, all-solid fiber supercapacitors have attracted extensive attention from researchers at home and abroad due to their excellent electrochemical properties, flexibility, weaving, light weight, and environmental friendliness. Currently, the low energy density limits the further development of fiber capacitors. Electrode material is the determining factor of capacitive performance. [0003] Graphe...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/36H01G11/48H01G11/86
CPCH01G11/24H01G11/30H01G11/36H01G11/48H01G11/86Y02E60/13
Inventor 周琴琴腾威利王金淑杜玉成李洪义胡鹏吴俊书李永利
Owner BEIJING UNIV OF TECH
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