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Tannic acid-polypyrrole-graphene oxide composite gel and preparation method and application thereof

A graphene composite and tannic acid technology, which is applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., to achieve the effects of improving electrochemical performance, improving agglomeration, and strengthening interaction

Active Publication Date: 2021-02-12
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the combination of polypyrrole and graphene oxide still faces some key problems

Method used

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  • Tannic acid-polypyrrole-graphene oxide composite gel and preparation method and application thereof
  • Tannic acid-polypyrrole-graphene oxide composite gel and preparation method and application thereof
  • Tannic acid-polypyrrole-graphene oxide composite gel and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of tannic acid-polypyrrole-graphene oxide composite gel, comprising the steps of:

[0031] 1) Take 4 mg of tannic acid to prepare an aqueous solution of tannic acid with a concentration of 0.3 wt%, then add 33.5 mg of pyrrole and stir for 10 min at 4° C., add 6 mg of graphene oxide and continue stirring for 10 min, and mix well to obtain tannic acid- Pyrrole-graphene oxide blend;

[0032] 2) Dissolve 0.1g of ferric chloride in 5ml of deionized water and add it to the tannic acid-pyrrole-graphene oxide blend obtained in step 1), and then stand at 10°C for 24h to obtain tannic acid- Polypyrrole-graphene oxide composite gel.

[0033] The tannic acid-polypyrrole-graphene oxide composite gel obtained in this embodiment is as follows: figure 1 .

[0034] The tannic acid-polypyrrole-graphene oxide composite gel prepared in this example was tested for electrochemical performance. The test instrument was Chenhua Electrochemical Workstation CHI900C, and th...

Embodiment 2

[0037] A preparation method of tannic acid-polypyrrole-graphene oxide composite gel, comprising the steps of:

[0038] 1) Take 4 mg of tannic acid to prepare an aqueous solution of tannic acid with a concentration of 0.3 wt%, then add 33.5 mg of pyrrole and stir for 30 min at 0° C., add 2 mg of graphene oxide and continue stirring for 30 min, and mix well to obtain tannic acid- Pyrrole-graphene oxide blend;

[0039] 2) Dissolve 0.1g of ferric chloride in 5ml of deionized water and add it to the tannic acid-pyrrole-graphene oxide blend obtained in step 1), and then stand at 15°C for 26h to obtain tannic acid- Polypyrrole-graphene oxide composite gel.

[0040] The tannic acid-polypyrrole-graphene oxide composite gel prepared in this example was tested for electrochemical performance. The test instrument was Chenhua Electrochemical Workstation CHI900C, and the test was carried out in sodium sulfate electrolyte. According to the capacitance calculation formula, in When the curre...

Embodiment 3

[0042] A preparation method of tannic acid-polypyrrole-graphene oxide composite gel, comprising the steps of:

[0043] 1) Take 4 mg of tannic acid to prepare an aqueous solution of tannic acid with a concentration of 0.3 wt%, then add 33.5 mg of pyrrole and stir for 20 min at 3° C., add 4 mg of graphene oxide and continue stirring for 20 min, and mix well to obtain tannic acid- Pyrrole-graphene oxide blend;

[0044] 2) Dissolve 0.1g of ferric chloride in 5ml of deionized water and add it to the tannic acid-pyrrole-graphene oxide blend obtained in step 1), and then stand at 10°C for 28h to obtain tannic acid- Polypyrrole-graphene oxide composite gel.

[0045] The tannic acid-polypyrrole-graphene oxide composite gel prepared in this example was tested for electrochemical performance. The test instrument was Chenhua Electrochemical Workstation CHI900C, and the test was carried out in sodium sulfate electrolyte. According to the capacitance calculation formula, in When the curre...

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Abstract

The invention discloses a preparation method of tannic acid-polypyrrole-graphene oxide composite gel, which comprises: adding pyrrole to a tannic acid aqueous solution, carrying out a stirring treatment at a temperature of 0-4 DEG C, adding graphene oxide, carrying out a secondary stirring to obtain a tannic acid-pyrrole-graphene oxide blended solution, then adding an iron salt aqueous solution into the blended solution obtained in the step 1), and carrying out standing treatment to obtain the tannic acid polypyrrole graphene oxide composite gel electrode material. The preparation method provided by the invention is simple, does not need complex equipment or organic solvents, does not pollute the environment, adopts easily available raw materials, can meet different application requirements, and is convenient to popularize, and the obtained composite electrode material can be used for preparing a supercapacitor and shows excellent specific capacitance and cycling stability.

Description

technical field [0001] The invention belongs to the technical field of polymer functional materials, and in particular relates to a tannic acid-polypyrrole-graphene oxide composite gel and a preparation method and application thereof. Background technique [0002] Conductive polymer hydrogel has become a very important class of smart soft materials in various advanced applications. The three-dimensional structure of hydrogel increases the specific surface area of ​​the material, which is conducive to the full combination with the electrolyte, thereby improving the specific surface area of ​​the material. capacitance. Conductive hydrogels with good electrochemical properties have become promising materials in wearable devices or implantable sensors. However, many existing hydrogel materials are limited in practical use. [0003] Among various conductive polymer materials, polypyrrole has the advantages of simple preparation, low cost, and stable performance. Combining polyp...

Claims

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Application Information

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IPC IPC(8): C08J3/24C08J3/075C08L79/04C08K3/04C08K5/1545C08G73/06H01G11/24H01G11/48H01G11/84
CPCC08J3/24C08J3/075C08G73/0611H01G11/84H01G11/24H01G11/48C08J2379/04C08K3/042C08K5/1545Y02E60/13
Inventor 李亮肖代君邓勇刘玉兰喻湘华
Owner WUHAN INSTITUTE OF TECHNOLOGY
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