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Preparation method and application of three-dimensional carbon aerogel with porous tube wall nanotubes

A carbon aerogel and nanotube technology, applied in the field of carbon materials, can solve the problems of non-uniformity, pores as small as sub-nanometers, pores as large as tens of nanometers or even hundreds of nanometers, and weak pore size controllability. , to achieve the effect of large specific surface area, broad application prospects and excellent fast charging performance

Active Publication Date: 2018-06-15
HARBIN INST OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the controllability of this method to the pore size is weak, and the pore size distribution of the obtained porous carbon material is not uniform, ranging from sub-nanometer pores to tens of nanometers or even hundreds of nanometers. The effect on capacitive performance is critical

Method used

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  • Preparation method and application of three-dimensional carbon aerogel with porous tube wall nanotubes
  • Preparation method and application of three-dimensional carbon aerogel with porous tube wall nanotubes
  • Preparation method and application of three-dimensional carbon aerogel with porous tube wall nanotubes

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Embodiment 1

[0035] This embodiment provides a method for preparing a three-dimensional carbon aerogel with porous tube-walled nanotubes, and the method is implemented according to the following steps:

[0036] 1. Preparation of silver nanowires:

[0037] Using 150mL of ethylene glycol as the reducing agent, 6.9 mg of sodium chloride as the initiator, and under the action of 1.36g of polyvinylpyrrolidone, 1.02g of silver nitrate was heated at 160°C for 6 hours by hydrothermal method, and then the product was centrifugally cleaned. obtain silver nanowires;

[0038] 2. Preparation of silver nanowire / polypyrrole three-dimensional porous airgel:

[0039] Take 1 mL of pyrrole monomer and add it into a mixed solution of 150 mL of ethanol and deionized water (the volume ratio of the two is 1:1) containing 1 g of silver nanowires under stirring, and use 1.23 g of silver nitrate as the oxidant to polymerize the pyrrole monomer For polypyrrole, obtain a three-dimensional hydrogel of silver nanowir...

Embodiment 2

[0046] This embodiment provides a method for preparing a three-dimensional carbon aerogel with porous tube-walled nanotubes, and the method is implemented according to the following steps:

[0047] 1. Preparation of silver nanowires:

[0048] Using 150mL of ethylene glycol as a reducing agent, 6.9g of sodium chloride as an initiator, and under the action of 1.36g of polyvinylpyrrolidone, 1.02g of silver nitrate was heated at 160°C for 6h by hydrothermal method, and then the product was centrifugally cleaned. obtain silver nanowires;

[0049] 2. Preparation of silver nanowire / polypyrrole three-dimensional porous airgel:

[0050] Take 2 mL of pyrrole monomer and add it into a mixed solution of 150 mL of ethanol and deionized water (the volume ratio of the two is 1:1) containing 1 g of silver nanowires under stirring, and use 2.46 g of silver nitrate as the oxidant to polymerize the pyrrole monomer For polypyrrole, obtain a three-dimensional hydrogel of silver nanowires / polypyr...

Embodiment 3

[0056] This embodiment provides a method for preparing a three-dimensional carbon aerogel with porous tube-walled nanotubes, and the method is implemented according to the following steps:

[0057] 1. Preparation of silver nanowires:

[0058] Using 150mL of ethylene glycol as the reducing agent, 6.9 mg of sodium chloride as the initiator, and under the action of 1.36g of polyvinylpyrrolidone, 1.02g of silver nitrate was heated at 160°C for 6h by hydrothermal method, and then the product was centrifugally washed to obtain silver nanowires;

[0059] 2. Preparation of silver nanowire / polypyrrole three-dimensional porous airgel:

[0060] Take 0.5 mL of pyrrole monomer and add it into a mixed solution of 150 mL of ethanol and deionized water (the volume ratio of the two is 1:1) containing 1 g of silver nanowires under stirring, and use 0.615 g of silver nitrate as the oxidant to make the pyrrole monomer Polymerize into polypyrrole to obtain a three-dimensional hydrogel of silver ...

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Abstract

The invention discloses a preparation method and an application of three-dimensional carbon aerogel with porous tube wall nanotubes. The preparation method comprises the following steps of 1, preparing silver nanowire / polypyrrole three-dimensional porous aerogel; 2, preparing three-dimensional hollow polypyrrole nanotube aerogel; and 3, preparing the three-dimensional carbon aerogel with porous tube wall nanotubes. By adoption of the method, the tube walls of the compact hollow nanometer carbon tubes can be formed into a porous structure through air etching, and the hole diameters can be effectively controlled to be within several nanometers, so that the quick charging problem in the porous carbon material can be overcome obviously; the porous carbon nanomaterial prepared in the inventionis of a three-dimensional self-supported network structure, and has a relatively large specific surface area; and when the three-dimensional carbon aerogel with porous tube wall nanotubes prepared inthe invention is used as an electrode material of a supercapacitor, the three-dimensional carbon aerogel has excellent quick charging performance, so that the three-dimensional carbon aerogel has wideapplication prospect in the field of energy.

Description

technical field [0001] The invention belongs to the technical field of carbon materials, and relates to a method for preparing a three-dimensional carbon airgel with porous tube wall nanotubes and its application in supercapacitors. Background technique [0002] In recent years, with the development of modern life, people's demand for energy has gradually increased, and energy issues have also received extensive attention. Among them, fast charging is of great significance in actual production and life. Supercapacitor is an energy storage device between traditional capacitors and secondary batteries. It has high power density and good cycle life. It can be used in conjunction with secondary batteries to meet the energy needs of modern life. Supercapacitors are mainly divided into two types: electric double-layer capacitors and pseudocapacitors. Among them, electric double-layer capacitors are charged and discharged by rapid adsorption and desorption of positive and negative ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/36H01G11/24H01G11/86
CPCY02E60/13H01G11/36H01G11/24H01G11/86
Inventor 赵雯琦李宜彬曹安源赫晓东
Owner HARBIN INST OF TECH
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