Functionalized graphene oxide/poly(3,4-ethylene dioxythiophene) composite material and preparation method thereof

A technology of ethylenedioxythiophene and composite materials, applied in the direction of hybrid capacitor electrodes, etc., can solve the problems of interfacial recombination, poor cycle stability, poor specific capacity, etc., and achieve the effect of solving uneven recombination

Active Publication Date: 2019-09-17
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems such as interfacial recombination, poor specific capacity and poor cycle stability of existing composite materials composed of carbon materials and conductive polymers used in supercapacitor electrode materials, the purpose of the present invention is to provide a Functionalized graphene oxide / poly(3,4-ethylenedioxythiophene) composite material and its preparation method, the composite material prepared by the present invention not only makes the interface composite uniform, but also has higher specific capacity and cycle stability

Method used

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  • Functionalized graphene oxide/poly(3,4-ethylene dioxythiophene) composite material and preparation method thereof
  • Functionalized graphene oxide/poly(3,4-ethylene dioxythiophene) composite material and preparation method thereof
  • Functionalized graphene oxide/poly(3,4-ethylene dioxythiophene) composite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0033] (1) Preparation of functionalized graphene oxide GO-TAA

[0034] Weigh 0.1g of graphene oxide (GO) and 1.05g of 2-thiopheneacetic acid into a 250mL round bottom flask, add 100mL of anhydrous dimethyl sulfoxide (DMSO) for ultrasonic oscillation for 1h, and then add 0.1g of p-toluene Sulfonamide. Bubble nitrogen at a large flow rate for 10 minutes, then heat to 150°C and stir the reaction under continuous bubbling. The water produced by the esterification reaction will be separated from DMSO in the form of an azeotrope until no new one is formed in the water separator. Liquid, the reaction stopped, the reaction 7.5h. The reacted mixture was washed with methanol by centrifugation to remove unreacted 2-thiopheneacetic acid. Finally, the product was vacuum-dried at 60°C for 24 hours to obtain functionalized graphene oxide, which was named GO-TAA. For its scanning electron micrograph, see figure 1 In (a) and (b), the infrared spectrogram see figure 2 .

[0035] (2) Prep...

Embodiment 2

[0041] Electrochemical performance test:

[0042] (1) Electrochemical performance test of composite GO-TAA-PEDOT

[0043] Preparation of the working electrode: Mix and stir GO-TAA-PEDOT, acetylene black (conductive agent) and polytetrafluoroethylene (binder) in a mass ratio of 8:1:1 to make it a good ductile of mixed materials. Then use a pestle to press and roll it into a sheet-like material with a thickness of about 200 μm, and dry it in a vacuum oven at 60° C. for 24 hours before use. During the test, it is pressed against the platinum sheet with a pressure of 20MPa.

[0044] (2) Electrochemical performance test of composite GO / PEDOT

[0045] Preparation of the working electrode: GO / PEDOT, acetylene black (conductive agent) and polytetrafluoroethylene (binder) were mixed and stirred at a mass ratio of 8:1:1 to make it a mixture with good ductility Material. Then use a pestle to press and roll it into a sheet-like material with a thickness of about 200 μm, and dry it in...

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Abstract

The invention discloses a functionalized graphene oxide/poly(3,4-ethylene dioxythiophene) composite material and a preparation method thereof. The composite material of the invention is prepared by the method comprising the following steps of: (1) adding graphene oxide, 2-thiophene acetic acid, and p-toluenesulfonic acid amide to a solvent, performing ultrasonic oscillation, and then performing an esterification reaction under the protection of nitrogen to obtain functionalization graphene oxide GO-TAA; (2) adding the GO-TAA and the 3,4-ethylene dioxythiophene to an acetonitrile solution, performing a ultrasonic treatment for 30 minutes, then dropwise adding an anhydrous ferric chloride solution dissolved in nitromethane, stirring the mixture at room temperature for reaction, washing and drying a product to obtain the composite material GO-TAA-PEDOT. The composite material prepared by the method not only makes an interface uniformly composite, but also has high specific capacity and cycle stability.

Description

technical field [0001] The invention belongs to the technical field of electrode material manufacture, and in particular relates to a functionalized graphene oxide / poly(3,4-ethylenedioxythiophene) composite material and a preparation method thereof. Background technique [0002] Graphene oxide (GO) is an intermediate formed by chemical oxidation of graphene, which can be regarded as a derivative of graphene. The difference between graphene oxide and graphene is that all graphene is sp 2 Hybrid carbon atoms, but graphene oxide contains a large number of oxygen-containing groups and defects. Oxygen-containing functional groups on the plane and edge can combine graphene oxide with other materials in the form of covalent, non-covalent or ionic bonds to prepare composite materials with specific and excellent properties. The oxygen-containing groups on the surface of graphene oxide are mainly hydroxyl, epoxy, aldehyde and carboxyl. The existence of these groups provides the pos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/36H01G11/48
CPCH01G11/30H01G11/36H01G11/48Y02E60/13
Inventor 刘军磊张凯立张诚许若腾罗俊涛
Owner ZHEJIANG UNIV OF TECH
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