Preparation method and application of oxygen-containing porous carbon aerogel

An aerogel and porous carbon technology, which is applied in the preparation/purification of carbon, hybrid capacitor electrodes, etc., to achieve the effects of large comparative area, improved wettability, and short production cycle

Active Publication Date: 2019-08-20
ENERGY RESOURCES INST HEBEI ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are no reports of carbon aerogels with pseudocapacitive properties in the prior art.

Method used

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  • Preparation method and application of oxygen-containing porous carbon aerogel
  • Preparation method and application of oxygen-containing porous carbon aerogel
  • Preparation method and application of oxygen-containing porous carbon aerogel

Examples

Experimental program
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Effect test

Embodiment 1

[0033] A preparation method of oxygen-containing porous carbon airgel, specifically comprising the steps of:

[0034] (1) Preparation of basic porous carbon airgel

[0035] Mix polyhydroxybenzene and formaldehyde at a molar ratio of 1:2, add deionized water to prepare a reaction solution with a mass fraction of 45%, mix the reaction solution evenly, seal it, and keep it warm at 50°C for 15 hours to fully react to obtain a Hydroquinone-phloroglucinol-formaldehyde organic wet gel, the polyhydroxybenzene is a mixture of phloroglucinol and resorcinol with a molar ratio of 7:1, and the organic wet gel is directly put into freeze-drying In the box, dry at -80±5°C for one day to obtain organic aerogels, and then carbonize under vacuum conditions. During the carbonization process, nitrogen gas is continuously fed at a rate of 20mL / min. Raise the temperature to 900±5°C and keep it for 3 hours, and then slowly lower it to room temperature to obtain a black carbon aerogel;

[0036] (2)...

Embodiment 2

[0040] A preparation method of oxygen-containing porous carbon airgel, specifically comprising the steps of:

[0041] (1) Preparation of basic porous carbon airgel

[0042] Mix polyhydroxybenzene and formaldehyde at a molar ratio of 1:2, add deionized water to prepare a reaction solution with a mass fraction of 45%, mix the reaction solution evenly, seal it, and keep it warm at 60°C for 12 hours to fully react to obtain a Hydroquinone-phloroglucinol-formaldehyde organic wet gel, the polyhydroxybenzene is a mixture of phloroglucinol and resorcinol with a molar ratio of 7:1, and the organic wet gel is directly put into freeze-drying In the box, dry at -80±5°C for one day to obtain organic aerogels, and then carbonize under vacuum conditions. During the carbonization process, nitrogen gas is continuously fed at a rate of 20mL / min. Raise the temperature to 900±5°C and keep it for 3 hours, and then slowly lower it to room temperature to obtain a black carbon aerogel;

[0043] (2)...

Embodiment 3

[0047] A preparation method of oxygen-containing porous carbon airgel, specifically comprising the steps of:

[0048] (1) Preparation of basic porous carbon airgel

[0049] Mix polyhydroxybenzene and formaldehyde at a molar ratio of 1:2, add deionized water to prepare a reaction solution with a mass fraction of 45%, mix the reaction solution evenly, seal it, and keep it warm at 50°C for 15 hours to fully react to obtain a Hydroquinone-phloroglucinol-formaldehyde organic wet gel, the polyhydroxybenzene is a mixture of phloroglucinol and resorcinol with a molar ratio of 7:1, and the organic wet gel is directly put into freeze-drying In the box, dry at -80±5°C for one day to obtain organic aerogels, and then carbonize under vacuum conditions. During the carbonization process, nitrogen gas is continuously fed at a rate of 20mL / min. Raise the temperature to 900±5°C and keep it for 3 hours, and then slowly lower it to room temperature to obtain a black carbon aerogel;

[0050] (2)...

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Abstract

The invention relates to a preparation method of oxygen-containing porous carbon aerogel, comprising the following steps: obtaining porous carbon aerogel through a conventional method, dispersing theporous carbon aerogel material in an aqueous solution of H2O2 and FeCl3 according to the concentration of 0.2-0.3 mg/ml with the molar ratio of H2O2 to FeCl3 being 1:1-1:4, uniformly stirring and mixing, adjusting pH to 2-4 by using a NaOH solution, treating by a plasma technology, carrying out suction filtration by using a mixed cellulose filter membrane after the reaction, washing with lots of deionized water to neutral level, collecting a powder, drying and grinding. The porous carbon aerogel provided by the invention has rich oxygen-containing functional groups, which can enhance wettability of the porous carbon aerogel in an electrolyte and can provide a pseudocapacitor having high capacitance.

Description

technical field [0001] The invention relates to a preparation method and application of an oxygen-containing porous carbon aerogel, belonging to the field of carbon aerogel preparation. Background technique [0002] Carbon aerogel is a new type of lightweight porous material, which is widely used as catalyst carrier, Hydrogen storage materials, adsorption materials, and electrode materials for supercapacitors or lithium-ion batteries, etc., are conducive to solving the energy crisis and environmental pollution problems in today's society and have become research hotspots. [0003] 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, pseudocapacitors can be generated not on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05H01G11/24H01G11/32H01G11/34H01G11/44
CPCC01B32/05H01G11/24H01G11/32H01G11/34H01G11/44Y02E60/13
Inventor 王莎莎许跃龙翟作昭张利辉刘振法
Owner ENERGY RESOURCES INST HEBEI ACADEMY OF SCI
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