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Preparation and application of polyaniline nanowire/three-dimensional porous graphene electrode material

A graphene electrode and three-dimensional porous technology, which is applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve problems such as poor structural stability, achieve low cost, prevent electrode materials from collapsing, and increase specific surface area and active sites point effect

Active Publication Date: 2020-07-31
GUIZHOU MEILING POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to solve the above-mentioned technical problems, the present invention aims at the defects of polyaniline and graphene materials and the deficiencies of the prior art. The present invention proposes the preparation and application of polyaniline nanowire / three-dimensional porous graphene electrode materials, using nickel mesh as the base, Using the hydrothermal method to efficiently prepare three-dimensional graphene materials with good conductivity and high specific surface area, combined with a specific preparation method, the two-dimensional graphene is constructed into a three-dimensional network graphene; and then using a simple and controllable electroplating method, Polyaniline nanowires / three-dimensional porous graphene composite electrode material was constructed by heat treatment and freeze-drying technology, which effectively solved the problem of graphene agglomeration and poor structural stability of polyaniline, and prepared polyaniline nanowires / three-dimensional porous graphite olefin electrode material

Method used

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  • Preparation and application of polyaniline nanowire/three-dimensional porous graphene electrode material
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  • Preparation and application of polyaniline nanowire/three-dimensional porous graphene electrode material

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Embodiment 1

[0051] A preparation method of polyaniline nanowire / three-dimensional porous graphene electrode material, comprising the steps of:

[0052] (1) Hydrothermal reaction: Cut the foamed nickel sheet into 1cm×1cm as the substrate, put the foamed nickel sheet and 0.01moL / l graphene oxide aqueous solution 20mL together in a 50mL hydrothermal reaction kettle, and control the hydrothermal reaction temperature The temperature is 100°C, and the reaction time is 5h. After the reaction, the nickel-based three-dimensional graphene is placed in a vacuum drying environment at 80°C and dried for use;

[0053] (2) Electroplating: Dissolve 2g of aniline monomer into 100mL of dilute sulfuric acid with a mass concentration of 20%, and prepare an aniline electroplating solution; a three-electrode system is adopted, with nickel-based three-dimensional graphene as the working electrode, and Ag / AgCl as the counter electrode. The Pt electrode was used as a reference electrode, and was electroplated at ...

Embodiment 2

[0058] A preparation method of polyaniline nanowire / three-dimensional porous graphene electrode material, comprising the steps of:

[0059] (1) Hydrothermal reaction: Cut the foamed nickel sheet into 1cm×1cm as the substrate, put the foamed nickel sheet and 0.5mol / l graphene oxide aqueous solution 20mL together in a 50mL hydrothermal reaction kettle, and control the hydrothermal reaction temperature The temperature is 150°C, and the reaction time is 3h. After the reaction, the nickel-based three-dimensional graphene is placed in a vacuum drying environment of 80°C and dried for use;

[0060] (2) Electroplating: Dissolve 5g of aniline monomer into 100mL of dilute sulfuric acid with a mass concentration of 20%, and prepare an aniline electroplating solution; adopt a three-electrode system, nickel-based three-dimensional graphene is the working electrode, and Ag / AgCl is the counter electrode. The Pt electrode was used as a reference electrode, and was electroplated at a constant ...

Embodiment 3

[0065] A preparation method of polyaniline nanowire / three-dimensional porous graphene electrode material, comprising the steps of:

[0066] (1) Hydrothermal reaction: Cut the foamed nickel sheet into 1cm×1cm as the substrate, place the foamed nickel sheet and 1moL / l graphene oxide aqueous solution 20mL together in a 50mL hydrothermal reaction kettle, and control the hydrothermal reaction temperature. 300°C, the reaction time is 0.5h. After the reaction, the nickel-based three-dimensional graphene is dried in a vacuum drying environment at 80°C for use;

[0067] (2) Electroplating: Dissolve 8g of aniline monomer into 100mL of dilute sulfuric acid with a mass concentration of 20%, and prepare an aniline electroplating solution; adopt a three-electrode system, nickel-based three-dimensional graphene is the working electrode, and Ag / AgCl is the counter electrode. The Pt electrode was used as a reference electrode, and was electroplated at a constant voltage of 0.6V for 10 minutes ...

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Abstract

The invention belongs to the technical field of energy storage materials. The invention particularly relates to preparation and application of a polyaniline nanowire / three-dimensional porous grapheneelectrode material. According to the electrode material, foamed nickel is used as a template; graphene oxide is used as a raw material; nickel-based three-dimensional graphene is prepared through a hydrothermal reaction; nickel-based three-dimensional graphene is taked as a conductive substrate; polyaniline nanowires are loaded by an electroplating method; the polyaniline nanowire / nickel-based three-dimensional graphene composite material is prepared; the polyaniline nanowire / three-dimensional porous graphene electrode material is prepared through a chemical impregnation method, heat treatment, acid pickling nickel removal and freeze drying; and the polyaniline nanowire / three-dimensional porous graphene electrode material is used for preparing a supercapacitor. The prepared electrode material has high specific capacitance, energy density and power density.

Description

technical field [0001] The invention belongs to the technical field of energy storage materials, and specifically relates to the preparation and application of polyaniline nanowire / three-dimensional porous graphene electrode materials. Background technique [0002] As a new type of energy storage device, supercapacitor has ultra-high power density, generally power density > 105W / kg, ultra-high power output in a short time, good reversibility, fast charge and discharge performance (<60s ), excellent cycle life (>105 times), wide working range (-70 ~ 40 ℃) and other advantages. Graphene has high conductivity (conductivity up to 106S / m), large specific surface area (theoretical specific surface area is 2630m 2 / g), the interlayer structure is rich, and its theoretical specific capacitance can reach 550F / g. However, due to the excellent characteristics of graphene, it is very easy to agglomerate graphene due to the π-π bond between graphene sheets during the process, ...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/36H01G11/48H01G11/86
CPCH01G11/30H01G11/48H01G11/36H01G11/24H01G11/86Y02E60/13
Inventor 廖敏会康树森王储陈晓涛刘江涛石斌陈铤
Owner GUIZHOU MEILING POWER SUPPLY CO LTD
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