A kind of spherical polyaniline/graphene composite membrane material and its preparation method and application

A composite technology of spherical polyaniline and graphene, which is applied in the manufacture of hybrid/electric double layer capacitors, electrodes of hybrid capacitors, structural parts, etc. The effects of random stacking of sheets, enhanced ion penetration and charge transfer capabilities, and short process flow

Active Publication Date: 2021-11-19
中科广化(重庆)新材料研究院有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the van der Waals force between graphene sheets, it is easy to stack and aggregate, which affects the electrochemical performance of its composite materials.
Polyaniline is directly polymerized on the surface of graphene, and its structure and morphology are also difficult to control

Method used

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  • A kind of spherical polyaniline/graphene composite membrane material and its preparation method and application
  • A kind of spherical polyaniline/graphene composite membrane material and its preparation method and application
  • A kind of spherical polyaniline/graphene composite membrane material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] In an ice bath (5°C), add aniline, phenol, and sodium lauryl sulfate at a mass ratio of 1:10:0.01 to 0.1mol / L hydrochloric acid solution (the mass ratio of aniline to hydrochloric acid solution is 1:200) and mix and stir Dissolve, add oxidant ammonium persulfate (accounting for 100% of the mass of aniline), and react for 12 hours to obtain spherical polyaniline. Graphene oxide, spherical polyaniline and reducing agent ascorbic acid are added to the solvent (a mixture of water and ethanol with a mass ratio of 1:1) in a mass ratio of 100:10:10, wherein the mass ratio of solvent to graphene oxide is 100 : 1, Ultrasonic mixing for 1 hour, pour the dispersion obtained after mixing into a polytetrafluoroethylene mold, set the temperature at 60°C, and react for 2 hours to obtain a composite film. The added amount of spherical polyaniline accounted for 10% of graphene oxide. Using a three-electrode constant current charge and discharge test, the composite film has a specific m...

Embodiment 2

[0039] In an ice bath (3°C), add aniline, phenol, and sodium lauryl sulfate at a mass ratio of 1:5:0.05 to 0.1mol / L hydrochloric acid solution (the mass ratio of aniline to hydrochloric acid solution is 1:100) and stir to dissolve , adding the oxidant ammonium persulfate (accounting for 100% of the aniline mass), and reacting for 12 hours to obtain spherical polyaniline. Graphene oxide, spherical polyaniline and reducing agent ascorbic acid are added in the solvent (a mixture of water and ethanol with a mass ratio of 1:1) in a mass ratio of 100:20:10, wherein the mass ratio of solvent to graphene oxide is 100: 1. Ultrasonic mixing for 1 hour, pour the dispersion obtained after mixing into a polytetrafluoroethylene mold, set the temperature at 60°C, and react for 2 hours to obtain a composite film. The added amount of spherical polyaniline accounted for 20% of graphene oxide. Using a three-electrode constant current charge and discharge test, the composite film has a specific ...

Embodiment 3

[0041] In an ice bath (0°C), add aniline, phenol, and sodium dodecylsulfonate in a mass ratio of 1:2:0.02 to 0.1mol / L hydrochloric acid solution (the mass ratio of aniline to hydrochloric acid solution is 1:50) and mix and stir Dissolve, add oxidant ammonium persulfate (accounting for 100% of the mass of aniline), and react for 12 hours to obtain spherical polyaniline. Graphene oxide, spherical polyaniline and reducing agent ascorbic acid are added to the solvent (a mixture of water and ethanol with a mass ratio of 1:1) in a mass ratio of 100:30:10, wherein the mass ratio of solvent to graphene oxide is 100:1 , ultrasonically mixed for 1 hour, poured the mixed dispersion liquid into a polytetrafluoroethylene mold, set the temperature at 80°C, and reacted for 4 hours to obtain a composite film. The added amount of spherical polyaniline accounted for 30% of graphene oxide. Using a three-electrode constant current charge and discharge test, the composite film has a specific mass...

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Abstract

The invention discloses a spherical polyaniline / graphene composite membrane material, a preparation method and application thereof. First, prepare a three-dimensional spherical polyaniline by emulsion polymerization, then add graphene oxide, spherical polyaniline and reducing agent into the solvent at a mass ratio of 100:10 to 100:10 and mix them, and react at 60-100°C for 2- After 8 hours, a conductive composite film was obtained. The three-dimensional spherical polyaniline is used as the filler of graphene sheets, which increases the interlayer spacing of graphene, enhances ion penetration and charge transfer capabilities, and at the same time, as a pseudocapacitive material, it can improve the electrochemical performance of graphene and also make up for the shortcomings of polyaniline. The disadvantage of poor cycle performance of aniline electrode material itself. The invention simplifies the technological process, the content of the spherical polyaniline filler is adjustable, the distance between the graphene sheets is controllable, the random stacking of the sheets is reduced, and the electrochemical performance of the composite electrode is improved.

Description

technical field [0001] The invention belongs to the field of composite electrode materials, and in particular relates to a spherical polyaniline / graphene composite membrane material and a preparation method and application thereof. Background technique [0002] Polyaniline, a conductive polymer, is one of the most promising pseudocapacitive materials due to its simple synthesis, low cost, high conductivity, and high energy density. However, in practical applications, long-term charging and discharging lead to shrinkage and expansion of polyaniline molecules, thereby affecting its cycle life. To make up for this shortcoming, people often use electric double layer capacitor electrode materials for compounding. Electrode materials for electric double layer capacitors are mainly carbon materials, which have excellent physical and chemical stability and cycle stability. Among them, graphene has excellent conductivity and high specific surface area and is often used as an ideal ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/02C08K3/04C08J5/18C08G73/02H01G11/24H01G11/30H01G11/36H01G11/48H01G11/86H01M4/36H01M4/583H01M4/60
CPCC08G73/0266C08J5/18C08J2379/02C08K3/042H01G11/24H01G11/30H01G11/36H01G11/48H01G11/86H01M4/366H01M4/583H01M4/606Y02E60/10
Inventor 吕满庚杜祥祥吕茂萍刘迎春姚飒吴昆史珺
Owner 中科广化(重庆)新材料研究院有限公司
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