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A kind of graphene composite material modified electrode and preparation method thereof

A technology of composite materials and modified electrodes, applied in the direction of electrochemical variables of materials, etc., can solve the problems of different performances, etc., and achieve the effects of high power density, good electrocatalytic activity, and excellent stability.

Active Publication Date: 2021-03-19
HENAN UNIV OF URBAN CONSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Various doping materials have advantages and disadvantages for improving the performance of materials, and their performances are different. At present, there is no research on 3-(2-aminoethyl)pyridine or 4-(2-aminoethyl)pyridine as a doping material. Related reports on the influence of materials on the performance improvement of graphene composites

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  • A kind of graphene composite material modified electrode and preparation method thereof

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Embodiment 1

[0021] The preparation of embodiment 1 graphene oxide

[0022] The preparation method of graphene oxide is as follows: take 8g of graphite raw material, 20g of potassium nitrate, add 100ml of potassium hydroxide aqueous solution (mass concentration 30%) and place it in a closed container, replace the gas in the container with oxygen and fill it with oxygen until the pressure is 12MPa , react at a temperature of 400° C., take out the reaction product for solid-liquid separation after the reaction, and wash and dry the obtained solid phase to obtain a graphene oxide solid product.

Embodiment 2

[0024] A graphene composite material modified electrode, the graphene composite material is iron oxide-graphene-3-(2-aminoethyl)pyridine composite material.

[0025] The preparation method of the above-mentioned graphene composite material modified electrode is carried out according to the following steps:

[0026] (1) Dissolve 35mg of graphene oxide in 10mL of deionized water, and disperse evenly by ultrasonic to form a suspension;

[0027] (2) Mix 90 mg of ferric chloride with 80 mg of 3-(2-aminoethyl)pyridine, dissolve in 6 mL of deionized water, and stir evenly;

[0028] (3) Slowly add the mixed solution prepared in step (2) to the suspension prepared in step (1), and stir evenly to make a mixed solution;

[0029] (4) Put the mixed solution prepared in step (3) in a reaction kettle, and react at 175° C. for 9 hours. After the reaction, cool naturally to room temperature to obtain a hydrogel-like substance;

[0030] (5) The hydrogel-like substance was soaked in deionized ...

Embodiment 3

[0032] A graphene composite material modified electrode, the graphene composite material is iron oxide-graphene-4-(2-aminoethyl)pyridine composite material.

[0033] The preparation method of the above-mentioned graphene composite material modified electrode is carried out according to the following steps:

[0034] (1) Dissolve 35mg of graphene oxide in 10mL of deionized water, and disperse evenly by ultrasonic to form a suspension;

[0035] (2) Mix 90 mg of ferric chloride with 80 mg of 4-(2-aminoethyl)pyridine, dissolve in 6 mL of deionized water, and stir evenly;

[0036] (3) Slowly add the mixed solution prepared in step (2) to the suspension prepared in step (1), and stir evenly to make a mixed solution;

[0037] (4) Put the mixed solution prepared in step (3) in a reaction kettle, and react at 175° C. for 9 hours. After the reaction, cool naturally to room temperature to obtain a hydrogel-like substance;

[0038] (5) The hydrogel-like substance was soaked in deionized ...

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Abstract

The invention discloses a graphene composite material modified electrode and a preparation method thereof. The graphene composite material is an iron oxide-graphene-3-(2-aminoethyl)pyridine compositematerial or an iron oxide-graphene-4-(2-aminoethyl)pyridine composite material. According to the graphene composite material modified electrode prepared by the invention, the graphite oxide and ferricchloride are used as raw materials and the 3-(2-aminoethyl)pyridine or 4-(2-aminoethyl)pyridine is used as a dopant; and the prepared Fe-N-C material has the high electrocatalytic activity and excellent stability.

Description

technical field [0001] The invention belongs to the technical field of graphene composite material preparation and application, and in particular relates to a graphene composite material modified electrode and a preparation method thereof. Background technique [0002] Electrode materials, as the core components of capacitors and batteries, are still the focus of current research. The composite of graphene and pseudocapacitive iron oxide can improve the conductivity of the material, reduce the agglomeration of nano-iron oxide, etc., and then realize the synergy of materials through the complementary advantages of graphene and pseudocapacitive materials, thereby obtaining high conductivity. Electrode materials with high cycle stability, efficient, fast and stable energy storage. [0003] The specific surface area, pore structure, electrical conductivity, and surface properties of the material are the key factors affecting the supercapacitor, and these structural characterist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30
Inventor 李银峰刘伟李霞王朝勇陈湘刘丽华李航王智锟
Owner HENAN UNIV OF URBAN CONSTR