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Three-dimensional graphene/conductive polypyrrole/conductive MOF composite electrode material and preparation method thereof

A composite electrode and graphene technology, which is applied in the manufacture of hybrid/electric double-layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of electrochemical performance attenuation and achieve high energy density, excellent cycle stability, and simple preparation process.

Pending Publication Date: 2022-05-17
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a preparation method of a three-dimensional graphene / conductive polypyrrole / conductive MOF composite electrode material, to solve the electrochemical performance attenuation of the composite electrode material due to volume expansion / shrinkage of the conductive polymer during the charging and discharging process question

Method used

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  • Three-dimensional graphene/conductive polypyrrole/conductive MOF composite electrode material and preparation method thereof
  • Three-dimensional graphene/conductive polypyrrole/conductive MOF composite electrode material and preparation method thereof
  • Three-dimensional graphene/conductive polypyrrole/conductive MOF composite electrode material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Graphene oxide was prepared by the improved Hummers method. Weigh 0.4 g of graphene oxide and dissolve it in 20 ml of distilled water, and stir evenly to obtain a graphene oxide solution.

[0025] (2) Add 1.4mL of phytic acid to the graphene oxide solution prepared in step (1), add 1.4mL of freshly steamed pyrrole monomer under full stirring, and mechanically stir for 5min until the pyrrole monomer is completely uniformly dispersed, then add 30mL ammonium persulfate solution. Stir evenly for 12 hours, wash and dry.

[0026] (3) Weigh 0.04 g of the composite material prepared in step (2), dissolve it in 20 ml of distilled water, and stir evenly.

[0027] (4) Weigh 0.1mmolNi(NO 3 ) 2 6H 2 O was dissolved in 10ml of water, slowly poured into the solution prepared in step (3), and stirred for 2h. Washing, drying and drying to obtain polypyrrole@3D graphene / conductive MOF composite material.

Embodiment 2

[0029] (1) Graphene oxide was prepared by the improved Hummers method. Weigh 0.4 g of graphene oxide and dissolve it in 20 ml of distilled water, and stir evenly to obtain a graphene oxide solution.

[0030] (2) Add 2.8mL of phytic acid to the graphene oxide solution prepared in step (1), add 1.4mL of freshly steamed pyrrole monomer under full stirring, and mechanically stir for 5min until the pyrrole monomer is completely uniformly dispersed, then add 30mL ammonium persulfate solution. Stir evenly for 12 hours, wash and dry.

[0031] (3) Weigh 0.04 g of the composite material prepared in step (2), dissolve it in 20 ml of distilled water, and stir evenly.

[0032] (4) Weigh 0.1mmolNi(NO 3 ) 2 6H 2 O was dissolved in 10ml of water, slowly poured into the solution prepared in step (3), and stirred for 2h. Washing, drying and drying to obtain polypyrrole@3D graphene / conductive MOF composite material.

Embodiment 3

[0034] (1) Graphene oxide was prepared by the improved Hummers method. Weigh 0.4 g of graphene oxide and dissolve it in 20 ml of distilled water, and stir evenly to obtain a graphene oxide solution.

[0035] (2) Add 3.6mL of phytic acid to the graphene oxide solution prepared in step (1), add 1.4mL of freshly steamed pyrrole monomer under full stirring, and mechanically stir for 5min until the pyrrole monomer is completely uniformly dispersed, then add 30mL ammonium persulfate solution. Stir evenly for 12 hours, wash and dry.

[0036] (3) Weigh 0.04 g of the composite material prepared in step (2), dissolve it in 20 ml of distilled water, and stir evenly.

[0037] (4) Weigh 0.1mmolNi(NO 3 ) 2 6H 2 O was dissolved in 10ml of water, slowly poured into the solution prepared in step (3), and stirred for 2h. Washing, drying and drying to obtain polypyrrole@3D graphene / conductive MOF composite material.

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Abstract

The invention discloses a three-dimensional graphene / conductive polypyrrole / conductive MOF composite electrode material and a preparation method thereof. The preparation method comprises the following steps: preparing graphene oxide by taking crystalline flake graphite as a raw material, adsorbing pyrrole molecules on the surface of the graphene oxide by utilizing an electrostatic attraction effect between oxygen-containing groups on the surface of the graphene oxide and-NH groups in the pyrrole molecules, and then synthesizing the graphene oxide / polypyrrole composite material by adopting an in-situ polymerization method. Adding a solution containing metal ions into a solution of the graphene oxide / conductive polypyrrole composite material to prepare a graphene oxide / polypyrrole / conductive MOF composite material; and reducing the graphene oxide to prepare the three-dimensional graphene / conductive polypyrrole / conductive MOF composite material. The method is simple in preparation process, environmentally friendly and reliable, and the prepared composite material has a regular space structure, high power density, high energy density and excellent cycle stability, is an ideal supercapacitor electrode material, and is especially suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of supercapacitors of novel energy and environmental protection materials, and specifically relates to a three-dimensional graphene / conductive polypyrrole / conductive MOF composite electrode material and a preparation method thereof Background technique [0002] Due to the rapid increase of global fossil fuel energy consumption and world population explosion, human beings have a growing demand for energy, and there is an urgent need to develop clean, low-cost, compact and efficient alternative energy sources. In recent years, supercapacitors have been considered as the most promising energy storage devices due to their fast charge and discharge rates, long cycle life, and good stability. A supercapacitor is mainly composed of a cathode, an anode, an electrolyte, and a diaphragm. Generally, according to different charge storage mechanisms, they are divided into electric double layer capacitors and pseudocapacitors. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/26H01G11/36H01G11/48H01G11/30
CPCH01G11/86H01G11/24H01G11/26H01G11/36H01G11/48H01G11/30Y02E60/13
Inventor 樊新赵若妤
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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