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Preparation method and application of polyaniline nanowire array/three-dimensional graphene

A nanowire array and graphene technology, applied in the field of materials, can solve the problem of low specific capacitance, achieve excellent mechanical properties, and increase the effect of contact area

Inactive Publication Date: 2019-08-16
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the electric double layer mechanism of graphene itself, its specific capacitance is low. In order to further increase the specific capacitance, we combined three-dimensional graphene with polyaniline

Method used

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  • Preparation method and application of polyaniline nanowire array/three-dimensional graphene
  • Preparation method and application of polyaniline nanowire array/three-dimensional graphene

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Embodiment 1

[0028] The preparation method of polyaniline nanowire array / three-dimensional graphene comprises the following steps:

[0029] Step 1: Fill a circular ceramic mold (2cm in diameter and 1cm in height) with 1.0g of nickel nanowires and place it in the center of a high-temperature tube furnace, and then place it in the H 2 Heating to 900~1100℃ under the airflow of / Ar, and annealing for 10~20min to obtain a three-dimensional nickel template, and then pass CH 4 After 10 to 20 minutes of air, the sample was placed in H 2 Cool to room temperature at a rate of 80-100°C / min under Ar airflow to obtain a three-dimensional nickel sample with graphene deposited on the surface;

[0030] The second step: put the above sample into 3-5mol / L hydrochloric acid to etch the nickel template to obtain three-dimensional graphene;

[0031] Step 3: Soak the three-dimensional graphene prepared above in concentrated nitric acid for 12-24 hours;

[0032] Step 4: Soak the three-dimensional graphene in ...

Embodiment 2

[0034] The preparation method of polyaniline nanowire array / three-dimensional graphene comprises the following steps:

[0035] Step 1: Fill a circular ceramic mold (2cm in diameter and 1cm in height) with 1.0g of nickel nanowires and place it in the center of a high-temperature tube furnace, and then place it in the H 2 Heating to 1000~1100℃ under the airflow of / Ar, and annealing for 15~20min to obtain a three-dimensional nickel template, and then pass CH 4 After 15 to 20 minutes of air, the sample was placed in H 2 Cool to room temperature at a rate of 90-100°C / min under Ar flow to obtain a three-dimensional nickel sample with graphene deposited on the surface;

[0036] The second step: put the above sample into 4-5mol / L hydrochloric acid to etch the nickel template to obtain three-dimensional graphene;

[0037] Step 3: Soak the three-dimensional graphene prepared above in concentrated nitric acid for 16-24 hours;

[0038] Step 4: soak the three-dimensional graphene in 1m...

Embodiment 3

[0040] The preparation method of polyaniline nanowire array / three-dimensional graphene comprises the following steps:

[0041] Step 1: Fill a circular ceramic mold (2cm in diameter and 1cm in height) with 1.0g of nickel nanowires and place it in the center of a high-temperature tube furnace, and then place it in the H 2 Heating to 1050-1100°C under the airflow of / Ar, and annealing for 18-20min to obtain a three-dimensional nickel template, and then pass CH 4 After 18-20min in the air, put the sample in H 2 Cool to room temperature at a rate of 95-100°C / min under Ar flow to obtain a three-dimensional nickel sample with graphene deposited on the surface;

[0042] The second step: put the above sample into 4.5-5mol / L hydrochloric acid to etch the nickel template to obtain three-dimensional graphene;

[0043] Step 3: Soak the three-dimensional graphene prepared above in concentrated nitric acid for 20-24 hours;

[0044] Step 4: soak the three-dimensional graphene in 1mol / L sul...

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Abstract

The invention belongs to the technical field of materials and discloses a preparation method and application of a polyaniline nanowire array / three-dimensional graphene. The method comprises the step of preparing a three-dimensional graphene with nickel nanowires as a template by the chemical vapor deposition technology, then improving the hydrophilicity of the three-dimensional graphene by concentrated nitric acid, and finally growing the polyaniline nanowire array on the surface of the three-dimensional graphene by a method aniline monomer in-situ polymerization. The obtained polyaniline nanowire array / three-dimensional graphene has the characteristics of small pore size, high strength and high conductance and has a high specific capacitance of 818 F / g at a current density of 1 A / g as a supercapacitor electrode material. After the assembly of a symmetrical supercapacitor, the capacitance retention still can reach 85% after 5000 times of charge and discharge cycles at the current density of 1 A / g.

Description

technical field [0001] The invention belongs to the technical field of materials, and relates to the preparation and application of a polyaniline nanowire array / three-dimensional graphene. Background technique [0002] Supercapacitors, also known as electrochemical capacitors, have the characteristics of long cycle life, fast charge and discharge speed, and high power density. Three-dimensional graphene has a porous structure, which has a large specific surface area, and at the same time avoids the problem of graphene agglomeration, and is an excellent electrode material for supercapacitors. At present, part of the three-dimensional graphene prepared is made of graphene oxide as a raw material, and the three-dimensional graphene hydrogel is prepared by the hydrothermal method, which has good mechanical properties, but there are a lot of defects; the other part mainly uses nickel foam as a template, using Three-dimensional graphene prepared by chemical vapor deposition techn...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/36H01G11/44H01G11/48H01G11/86
CPCH01G11/24H01G11/30H01G11/36H01G11/44H01G11/48H01G11/86Y02E60/13
Inventor 岳红彦张腾高鑫陈宏涛吴鹏飞郭鑫睿
Owner HARBIN UNIV OF SCI & TECH
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