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Preparation method of mesoporous and micropore carbon aerogel

A technology of airgel and microporous carbon, applied in hybrid capacitor electrodes, nano-carbon, etc., can solve the problems of low specific capacity and rate performance, small specific surface area of ​​carbon aerogel, etc.

Inactive Publication Date: 2019-10-25
庞定根
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem mainly solved by the present invention is aimed at the charcoal aerogel prepared from resorcinol / formaldehyde as the raw material for the common charcoal aerogel at present. The defects of small specific surface area, low specific capacity and low rate performance of the gel provide a preparation method for mesoporous carbon aerogel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0031] Preparation of pretreatment solution:

[0032] Take the pine bark and put it into a jet mill to pulverize for 20min to obtain the pine bark powder. The pine bark powder and the sodium hydroxide solution with a mass fraction of 30% are mixed in a mass ratio of 1:10 and then put into an ultrasonic vibrator. 28kHz frequency ultrasonic oscillation treatment for 1h to obtain the pretreatment solution;

[0033] Preparation of Cooked Products:

[0034] Put the above-mentioned pretreatment liquid into a high-pressure reactor, and cook under high-temperature and high-pressure cooking at a pressure of 0.5 MPa and a temperature of 160°C for 10 hours. Adjust the pH to neutral to obtain a cooked product;

[0035] Preparation of the preform:

[0036]According to the mass ratio of 2:1:20, mix phenol with the above-mentioned cooking product and deionized water and add them into the conical flask with vent tube and stirrer, and then add 0.5% phenol mass hydroxide to the conical flask...

example 2

[0044] Preparation of pretreatment solution:

[0045] Take the pine bark and put it into an airflow mill and pulverize it for 25min to obtain the pine bark powder. The pine bark powder and the mass fraction of 30% sodium hydroxide solution are mixed in a mass ratio of 1:10 and then put into an ultrasonic vibrator. 29kHz frequency ultrasonic oscillation treatment for 2h to obtain the pretreatment solution;

[0046] Preparation of Cooked Products:

[0047] Put the above-mentioned pretreatment liquid into a high-pressure reactor, and cook it under high temperature and high pressure for 11 hours at a pressure of 0.6MPa and a temperature of 170°C. Adjust the pH to neutral to obtain a cooked product;

[0048] Preparation of the preform:

[0049] According to the mass ratio of 2:1:20, mix phenol with the above-mentioned cooking product and deionized water and add them into the conical flask with vent tube and stirrer, and then add 0.5% phenol mass hydroxide to the conical flask. ...

example 3

[0057] Preparation of pretreatment solution:

[0058] Take the pine bark and put it into an airflow mill and pulverize it for 30min to obtain the pine bark powder. The pine bark powder and the mass fraction of 30% sodium hydroxide solution are mixed in a mass ratio of 1:10 and then put into an ultrasonic oscillator. 30kHz frequency ultrasonic oscillation treatment for 2h to obtain the pretreatment solution;

[0059] Preparation of Cooked Products:

[0060] Put the above-mentioned pretreatment liquid into a high-pressure reactor, cook at a high temperature and high pressure for 12 hours under the conditions of a pressure of 0.7 MPa and a temperature of 180 ° C, and after the cooking is completed, naturally cool to room temperature, and use 0.5 mol / L of hydrochloric acid Adjust the pH to neutral to obtain a cooked product;

[0061] Preparation of the preform:

[0062] According to the mass ratio of 2:1:20, mix phenol with the above-mentioned cooking product and deionized wate...

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Abstract

The invention relates to a preparation method of mesoporous and micropore carbon aerogel, and belongs to the technical field of capacitor material preparation. The preparation method comprises the steps that firstly, pine bark powder rich in lignin and cellulose is used as a raw material, and is blended with lye and a mixed solution is ultrasonically treated, and then put into a high-pressure reactor to react to obtain a stewing product, subsequently, phenol, the stewing product and formaldehyde are mixed to react to obtain a pre-prepared liquid, a pretreated gel is obtained through a heatingreaction, carbonizing is conducted after supercritical drying, and finally the mesoporous and micropore carbon aerogel is prepared. The mesoporous and micropore carbon aerogel prepared by the preparation method has the large specific capacity and specific surface area, the pore size is mainly distributed near mesoporous and the micropores, the rate capability is excellent, and wide application prospects are achieved.

Description

technical field [0001] The invention relates to a method for preparing mesomicroporous carbon airgel, which belongs to the technical field of capacitor material preparation. Background technique [0002] The rapid development of the world economy and the rapid consumption of energy make people put forward higher requirements for energy storage devices, which brings greater opportunities and challenges to the development of supercapacitors. Supercapacitors have the characteristics of large specific energy and high specific power, but specific application fields have different requirements for specific energy and specific power of capacitors. [0003] The electrode material is the key to the performance improvement of supercapacitors. To obtain high power performance, the diffusion resistance of ions in the electrolyte in the electrode material must be small. The conductivity of the aqueous electrolyte is much higher than that of the organic electrolyte, and it can obtain exc...

Claims

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Application Information

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IPC IPC(8): C01B32/15C08J9/28C08L61/14C08G8/28H01G11/24H01G11/36H01G11/34H01G11/44
CPCC01B32/15C08G8/28C08J9/28C08J2205/026C08J2361/14H01G11/24H01G11/34H01G11/36H01G11/44Y02E60/13
Inventor 庞定根
Owner 庞定根
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