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Reduced graphene oxide/conductive polymer composite gel and preparation method thereof

A technology of conductive polymer and composite gel, applied in the direction of hybrid capacitor electrodes, etc., can solve the problems of poor dispersion of graphene and conductive polymer, poor electrochemical performance, etc., and achieves improved electrical performance, low cost, and preparation method. simple effect

Pending Publication Date: 2021-10-22
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a reduced graphene oxide / conductive polymer composite gel and a preparation method thereof, which solves the problem of poor dispersion of graphene and conductive polymer in the existing composite gel, which leads to electrochemical poor performance problem

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  • Reduced graphene oxide/conductive polymer composite gel and preparation method thereof
  • Reduced graphene oxide/conductive polymer composite gel and preparation method thereof

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preparation example Construction

[0030] In order to further solve the above problems, combined with figure 1 As shown, the embodiment of the present invention provides a method for preparing a reduced graphene oxide / conductive polymer composite gel, comprising the following steps:

[0031] S1, adjust the pH value of the dopamine hydrochloride solution to 8-9, and record it as solution A;

[0032] S2. Add the conductive polymer to the graphene oxide aqueous dispersion, stir and ultrasonically treat it to make it evenly dispersed, and record it as solution B;

[0033] S3. Add solution A to solution B, stir evenly, and carry out hydrothermal reaction, take out the product, wash it with deionized water, freeze-dry, and obtain the reduced graphene oxide / conductive polymer composite gel.

[0034] In the present invention, by adding dopamine hydrochloride solution, under alkaline conditions, dopamine is coated on the surface of graphene oxide and conductive polymers, and self-polymerizes into polydopamine, which pr...

Embodiment 1

[0047] This embodiment provides a method for preparing a reduced graphene oxide / conductive polymer composite gel, which specifically includes the following steps:

[0048] 1) Adjust the pH value of the 2 mg / mL dopamine hydrochloride solution to 8 with a trihydroxymethane solution, and record it as solution A;

[0049] 2) Take 10 mL of graphene oxide aqueous dispersion with a concentration of 2 mg / mL, add 5 mg of polyaniline into it, stir for 10 min, and ultrasonically disperse it for 20 min to make it uniformly dispersed, and record it as solution B;

[0050] 3) Add 2mL of solution A to solution B, stir for 10min, then conduct low-temperature hydrothermal reaction at 95°C for 10h, take out the product, wash it with deionized water, and freeze-dry to obtain reduced graphene oxide / conductive polymer Composite gel.

[0051] The invention adopts low-temperature hydrothermal reaction to synthesize the gel, which greatly reduces energy loss, and the experiment process is relatively...

Embodiment 2

[0055] This embodiment provides a method for preparing a reduced graphene oxide / conductive polymer composite gel, which differs from Example 1 in that:

[0056] In step 1), the pH value of the 2 mg / mL dopamine hydrochloride solution was adjusted to 8.5 with trimethylol methane solution, which was designated as solution A;

[0057] In step 2), take 10 mL of graphene oxide aqueous dispersion with a concentration of 2 mg / mL, add 10 mg of polyaniline into it, stir for 15 min, and ultrasonically 10 min to make it uniformly dispersed, and record it as solution B;

[0058] All the other steps and parameters are the same as in Example 1.

[0059] The reduced graphene oxide / conductive polymer composite gel prepared in Example 2 is electrochemically tested, and the test conditions are: 1m H 2 SO 4 The solution is the electrolyte, the silver chloride electrode is the reference electrode, the platinum electrode is the counter electrode, and the sheet pressed from the reduced graphene ox...

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Abstract

The invention provides reduced graphene oxide / conductive polymer composite gel and a preparation method thereof. The preparation method comprises the following steps: S1, adjusting the pH value of a dopamine hydrochloride solution to 8-9, and marking the dopamine hydrochloride solution as a solution A; S2, adding conductive macromolecules into the graphene oxide aqueous dispersion, stirring and carrying out ultrasonic treatment to uniformly disperse the conductive macromolecules, and marking the conductive macromolecules as a solution B; and S3, adding the solution A into the solution B, uniformly stirring, carrying out hydrothermal reaction, taking out a product, washing with deionized water, and freeze-drying to obtain the reduced graphene oxide / conductive polymer composite gel. According to the invention, the dopamine is coated on the surfaces of the graphene oxide and the conductive polymer and is self-polymerized into polydopamine, so that the mutual dispersion of the graphene oxide and the conductive polymer is promoted, and the electrical properties of the composite gel are improved; in addition, the electrochemical properties of the composite gel can be regulated and controlled by controlling the ratio of the components.

Description

technical field [0001] The invention relates to the technical field of conductive polymers, in particular to a reduced graphene oxide / conductive polymer composite gel and a preparation method thereof. Background technique [0002] In recent years, due to the rapid development of smart portable electronics, electric vehicles, and clean environment awareness, the demand for high-energy, sustainable, and environmentally friendly electrochemical energy storage devices has greatly increased. Due to advancements in machine learning, artificial intelligence, IoT and functionality of these smart devices, their power consumption has increased many times over. To meet the demand for energy storage in the emerging field of smart electronics, it is necessary to design and develop efficient high-energy flexible electrode materials. The conductive polymer hydrogel has become a very widely used intelligent soft material. Since the three-dimensional structure of the hydrogel increases its...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30
CPCH01G11/30
Inventor 余祥乐李亮刘玉兰刘辉黄华波喻湘华
Owner WUHAN INSTITUTE OF TECHNOLOGY
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