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Graphene-polypyrrole nanoparticle composite film electrode and preparation method thereof

A polypyrrole nano-particle composite technology, which is applied in the field of electrochemical energy storage, can solve the problems of affecting electrochemical performance, poor conductivity of metal oxides, poor mechanical properties of graphene hydrogel film electrodes, etc., and achieve good mechanical properties and The effect of electrochemical performance, simple preparation method, and easy large-scale preparation

Active Publication Date: 2016-07-27
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, due to the poor mechanical properties of graphene hydrogel film electrodes, there are great limitations in practical applications.
The conductivity of metal oxides is relatively poor, which inevitably affects their electrochemical performance as electrodes for supercapacitors.

Method used

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  • Graphene-polypyrrole nanoparticle composite film electrode and preparation method thereof
  • Graphene-polypyrrole nanoparticle composite film electrode and preparation method thereof
  • Graphene-polypyrrole nanoparticle composite film electrode and preparation method thereof

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Embodiment A1

[0023] In a preferred embodiment of the present invention, the preparation of the reduced graphene oxide solution in step A can be achieved by the following steps: Weigh 600 mg of graphene oxide prepared by the Hummers method and disperse it in deionized water, add 1.5 g of dodecyl Sodium benzenesulfonate was used as a surfactant, and the graphene oxide dispersion was obtained by ultrasonication for 1 h; 3 mL of 85% hydrazine hydrate was added, and the oil bath was heated to 100 ° C, and the reduced graphene oxide dispersion was obtained after 12 h of reaction. The concentration of the reduced graphene oxide dispersion obtained in this example can be adjusted to 0.6 mg / mL by further adding deionized water.

Embodiment B1

[0025] In a preferred embodiment of the present invention, the preparation of polypyrrole nanoparticles in step B can be achieved through the following steps: 0.676gFeCl 3 ·6H 2 O was dissolved in 50 mL of water, 0.818 g of methyl orange was added, stirred for 0.5 h, 0.168 g of pyrrole monomer was added, stirred at room temperature for 24 h, solid-liquid separation, and vacuum-dried at 60°C for 24 h to obtain polypyrrole nanoparticle solid powder.

Embodiment C1

[0027] In a preferred embodiment of the present invention, the preparation of the graphene-polypyrrole nanoparticle composite film in step C can be achieved by the following steps: take the above-mentioned reduced graphene oxide dispersion 45mL, add 3mg of the above-mentioned polypyrrole nanoparticles, ultrasonic 0.5 h, filter under reduced pressure, dry naturally, and remove the filter membrane to obtain a graphene-polypyrrole nanoparticle composite film.

[0028] The graphene-polypyrrole nanoparticle composite film that present embodiment obtains contains the polypyrrole nanoparticle of 10wt%, and thickness is 39.4 μm, and area density is 2.96mg / cm 2 . Electrochemical tests were carried out under the three-electrode system, and the maximum area specific capacitance of the graphene-polypyrrole nanoparticle composite film electrode was 232mF / cm 2 , the maximum volume specific capacitance is 58.7F / cm 3 .

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Abstract

The invention provides a graphene-polypyrrole nanoparticle composite film electrode, which is formed by compounding graphene and polypyrrole nanoparticles, wherein the polypyrrole nanoparticles are methyl orange-doped polypyrrole nanoparticles; and the sizes are 50-200nm. The composite film electrode has flexibility, good mechanical property and electrochemical properties, relatively high area capacitance value and volumetric capacitance value and excellent cycling stability and chemical stability. Compared with other film electrodes, the composite film electrode provided by the invention is simple in preparation method and easy to operate; and large-scale and large-area preparation is easy to implement. Adjustment and control on the mechanical property and the electrochemical properties of the graphene-polypyrrole nanoparticle composite film electrode can be achieved through adjustment on the content of the polypyrrole nanoparticles and the thickness of a film; and the composite film electrode has a broad application prospect in the field of energy storage of super capacitors.

Description

technical field [0001] The invention relates to the field of electrochemical energy storage, in particular to a graphene-polypyrrole nanoparticle composite film electrode and a preparation method thereof. Background technique [0002] Graphene has high electrical and thermal conductivity, fast electron mobility, high specific surface area, excellent chemical stability and mechanical properties, making it one of the ideal energy storage materials, widely used in lithium batteries and supercapacitors. Based on the principle of electric double layer, graphene sheets can charge and discharge quickly, have good capacitive performance, especially have extremely high power density, and can meet the requirements of supercapacitors for high power density. [0003] Due to the π-π stacking effect between the layers of graphene nanosheets, the parallel stacking structure leads to a decrease in the specific surface area of ​​graphene, which greatly limits the energy storage performance o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/24H01G11/30H01G11/32H01G11/48H01G11/86
CPCY02E60/13H01G11/24H01G11/30H01G11/32H01G11/48H01G11/86
Inventor 胡南滔杨超张丽玲杨志张亚非
Owner SHANGHAI JIAO TONG UNIV
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