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A kind of preparation method of graphene/polyethylenedioxythiophene composite fiber assembly

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

Active Publication Date: 2021-08-06
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A kind of preparation method of graphene/polyethylenedioxythiophene composite fiber assembly
  • A kind of preparation method of graphene/polyethylenedioxythiophene composite fiber assembly
  • A kind of preparation method of graphene/polyethylenedioxythiophene composite fiber assembly

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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 2.0 mL of the above mixed solution, 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 3.0 hours. Cool to room temperature, take out the graphene / PEDOT:PSS gel fiber, soak with concentrated sulfuric aci...

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: use 325-mesh graphite powder as raw material to prepare graphene oxide according to the hummers method, and use a cell pulverizer to sonicate for 15.0 minutes to obtain graphene oxide with a small size (1.0-2.0 μm); (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 graphene ox...

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Abstract

A method for preparing a graphene / polyethylenedioxythiophene composite fiber assembly belongs to the field of materials and the field of electrochemistry. The composite material uses graphene oxide and PEDOT:PSS as raw materials, and co-assembles through hydrothermal reaction to form a double-network porous composite fiber. Compared with the prior art, the graphene / polyethylenedioxythiophene composite fiber assembly of the present invention fully considers the types of graphene precursors, and proposes a new design for the co-assembly of graphene and polyethylenedioxythiophene Based on this idea, the effective control of the porous microstructure and conductive properties of composite fibers has been realized. The composite fiber of the invention can be directly used as an electrode of a fiber supercapacitor, and can also be used as a highly conductive porous carrier to load other highly active materials. The method provided by the invention has the advantages of low cost, convenient operation, short production cycle and easy realization of industrialized 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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Patent Type & Authority Patents(China)
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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