Spherical polyaniline/graphene composite film material as well as preparation method and application thereof

A composite technology of spherical polyaniline and graphene, which is applied in the manufacture of hybrid/electric double layer capacitors, electrodes of hybrid capacitors, electrical components, etc. Random stacking of sheets, enhanced ion penetration and charge transfer capabilities, and enhanced electrochemical performance

Active Publication Date: 2019-07-23
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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  • Spherical polyaniline/graphene composite film material as well as preparation method and application thereof
  • Spherical polyaniline/graphene composite film material as well as preparation method and application thereof
  • Spherical polyaniline/graphene composite film material as well as preparation method and application thereof

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 film material as well as a preparation method and application thereof. The preparation method comprises the steps: firstly, preparingthree-dimensional spherical polyaniline through an emulsion polymerication method; then adding oxidized graphene, the spherical polyaniline and a reducing agent into a solvent according to the mass ratio of 100 to (10 to 100) to 10, mixing and reacting for 2 to 8 hours under 60 to 100 DEG C to obtain a conductive composite film. The three-dimensional spherical polyaniline is utilized as a fillerof graphene layers, so that the distance among the graphene layers is improved, and ion penetration and charge transfer capacity are enhanced; meanwhile, the three-dimensional spherical polyaniline can serve as a faradaic pseudocapacitance material to improve electrochemical performance of the graphene and also can overcome the defect that self circulation performance of a polyaniline electrode material is poor. According to the preparation method disclosed by the invention, a technological process is simplified, the content of the spherical polyaniline filler is adjustable, the distance of the graphene layers is controllable, random pile of the layers is reduced, and electrochemical performance of a combined 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 Applications(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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