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Preparation of GrapheneConducting Polymer Composite Electrode Materials by Mechanochemical Polymerization

A conductive polymer and mechanochemical technology, applied in the field of graphene/conductive polymer composite electrode materials prepared by mechanochemical polymerization, can solve the problem of poor dispersion of graphene and polyaniline, affecting the electrochemical performance of composite materials, and easy regeneration of graphene. Agglomeration and other problems, to achieve the effects of excellent electrochemical performance, controllable loading content, and stable product quality

Inactive Publication Date: 2019-01-11
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has the advantage of no need for subsequent reduction of graphene, but it is not simple and efficient, and graphene is easy to re-aggregate during the preparation process, resulting in poor dispersion of graphene and polyaniline, which affects the electrochemical performance of the composite material

Method used

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  • Preparation of GrapheneConducting Polymer Composite Electrode Materials by Mechanochemical Polymerization
  • Preparation of GrapheneConducting Polymer Composite Electrode Materials by Mechanochemical Polymerization

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Experimental program
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Embodiment 1

[0022] In the first embodiment, the graphene / polyaniline composite electrode material was prepared by mechanochemical polymerization.

[0023] Preparation:

[0024] (1) Add 0.2 g of natural graphite with a size of 50 mesh and 9.8 g of aniline into 100 mL of 10 wt.% dilute hydrochloric acid aqueous solution as liquid A.

[0025] (2) Dissolve 25 g of ammonium persulfate, 0.1 g of sodium lignosulfonate, and 1 mL of ethanol in 100 mL of deionized water, as liquid B.

[0026] (3) Liquid A and liquid B were mixed uniformly and then transferred to a ball milling reactor, and reacted by mechanical ball milling at 300 rpm for 4 hours to obtain mixture C.

[0027] (4) Mixture C was washed and filtered with 100 mL deionized water to obtain solid D.

[0028] (5) The solid D was washed and filtered with 100 mL of ethanol, and vacuum-dried at 60° C. to obtain a graphene / polyaniline composite electrode material.

[0029] Performance Characterization:

[0030] The resulting graphene / polya...

Embodiment 2

[0033] In the second embodiment, the graphene / polypyrrole composite electrode material is prepared by mechanochemical polymerization, which specifically includes the following steps:

[0034] (1) Take 0.5 g of flake graphite with a size of 200 mesh and 9.5 g of pyrrole, add it to 100 mL of ethanol aqueous solution (volume ratio 1:1), stir for 10 min and mix evenly, as liquid A.

[0035] (2) Dissolve 33 g of ferric chloride and 0.1 g of polyvinyl alcohol in 100 mL of ethanol aqueous solution (volume ratio 1:1) as liquid B.

[0036] (3) Liquid A and liquid B were mixed uniformly and then transferred to a sand mill reactor, and mixture C was obtained after continuous sand mill reaction at 2000 rpm for 6 hours.

[0037] (4) The mixture C was washed several times with deionized water and filtered to obtain solid D.

[0038](5) The solid D was washed and filtered again with 300ml of ethanol, and vacuum-dried at 60° C. to obtain a graphene / polypyrrole composite electrode material. ...

Embodiment 3

[0040] In this embodiment three, the graphene / polyaniline / polypyrrole composite electrode material is prepared by mechanochemical polymerization, which specifically includes the following steps:

[0041] (1) Add 0.6g of expanded graphite, 4.3g of aniline, 4.3g of pyrrole, 2g of polyvinylpyrrolidone, and 1.0g of phytic acid into 100mL of ethanol aqueous solution (volume ratio 2:1), stir for 20min, and use it as liquid A.

[0042] (2) Take 8.6g of ferric chloride and dissolve it in 100mL of ethanol aqueous solution (volume ratio 2:1) as liquid B.

[0043] (3) After mixing liquid A and liquid B evenly, use a high-speed shear disperser to react at 25,000 rpm for 2 hours to obtain mixture C, and control the temperature to <50°C.

[0044] (4) The mixture C was repeatedly washed with deionized water and filtered to obtain solid D.

[0045] (5) The solid D was washed with ethanol, filtered, and vacuum-dried at 60° C. to obtain a graphene / polyaniline / polypyrrole composite electrode ma...

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Abstract

The invention provides preparation of grapheneconducting polymer composite electrode materials by mechanochemical polymerization. Grapheneconductive polymer composite electrode material with excellent performance can be obtained by in-situ polymerization of monomer on the surface of graphene and peeling off graphene into graphene by one-step reaction of mechanochemistry. The method specifically comprises the following steps adding a mixed solution containing graphite and conductive polymer monomer into a mechanochemical reactor, and obtaining a grapheneconductive polymer composite electrode material through one-step mechanochemical in-situ polymerization reaction. The results show the the conductive polymer is distributed uniformly on the surface of graphene, the loading content is controllable, the defect degree of graphene is little, the conductivity is high, and the electrochemical performance is excellent, so it can be used as the electrode material of supercapacitor with high performance.

Description

technical field [0001] The invention belongs to the field of composite material preparation, and in particular relates to the preparation of graphene / conductive polymer composite electrode materials by mechanochemical polymerization. technical background [0002] Due to the rapid consumption of fossil energy such as petroleum and the resulting environmental pollution, new green energy storage devices such as supercapacitors have attracted widespread attention due to their high energy conversion efficiency, high power density and energy density, and long cycle life. Conductive polymer materials such as polyaniline, polypyrrole, and polythiophene are not only cheap, but also can undergo continuous and reversible faradaic redox reactions, thus having a large specific capacity. However, the low conductivity and poor cycle stability of pure conductive polymer materials affect its electrochemical performance. At present, most of the comprehensive properties of conductive polymers...

Claims

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Application Information

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IPC IPC(8): H01G11/30H01G11/36H01G11/48H01G11/24H01G11/86
CPCH01G11/24H01G11/30H01G11/36H01G11/48H01G11/86Y02E60/13
Inventor 杨应奎王相刚邱胜强何承恩崔逊
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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