Method and application of preparing nitrogen-doped porous carbon material

A nitrogen-doped porous carbon and nitrogen-doped carbon technology, applied in the field of material science, can solve the problems of limitation, high price, complex synthesis process, etc., and achieve the effect of high-value utilization and mild reaction.

Active Publication Date: 2021-04-30
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The high price and complicated synthesis process of traditional ionic liquids limit the preparation of industrialized carbon materials

Method used

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  • Method and application of preparing nitrogen-doped porous carbon material
  • Method and application of preparing nitrogen-doped porous carbon material
  • Method and application of preparing nitrogen-doped porous carbon material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Example 1 of the present invention: Preparation of alginic acid-1,8-diazabicycloundec-7-ene protic ionic liquid precursor (A-DBU): Weigh 34.576g DBU and put it into a 250ml flask , add 100ml of pure water, mix completely and add 40g of alginic acid. After reacting at 25°C for 12 hours, the solution was lyophilized for 48 hours. Use a pulverizer to pulverize into powder to prepare A-DBU alginic acid proton type ionic liquid precursor.

[0069]Preparation of nitrogen-doped porous carbon materials: 10 g of alginic acid-1,8-diazabicycloundec-7-ene proton-type ionic liquid precursor was directly placed in a tube furnace, and the temperature was directly raised under Ar conditions To carbonize at 900°C, the heating rate is 5°C / min, the carbonization time is 2h, and the flow rate of argon gas is 200ml / min. After the temperature dropped to normal temperature, the sample was taken out to obtain the target product-A-DBU-NDPs-900 with a yield of 16.7%, the nitrogen content of th...

Embodiment 2

[0070] Example 2 of the present invention: Preparation of alginic acid-1,8-diazabicycloundec-7-ene protic ionic liquid precursor (A-DBU): Weigh 34.576g DBU and put it into a 250ml flask , add 100ml of pure water, mix completely and add 40g of alginic acid. 40°C, reacted for 8 hours, and dried the solution in a lyophilizer for 48 hours. Use a pulverizer to pulverize into powder to prepare A-DBU alginic acid proton type ionic liquid precursor.

[0071] Preparation of nitrogen-doped porous carbon material: put 10 g of alginic acid-1,8-diazabicycloundec-7-ene proton-type ionic liquid precursor into a tube furnace and carbonize at 500 °C under Ar condition 1h, the heating rate is 5°C / min, the argon gas flow rate is 200ml / min, after the temperature drops to room temperature, weigh 1.75g ​​of the sample, weigh 1.5g of the sample and mix it with 6g of KOH, the ratio is KOH / sample=4 : 1, activate the carbon material at 900°C, and the activation time is 2h. The heating rate is 5°C / mi...

Embodiment 3

[0072] Example 3 of the present invention: Preparation of alginic acid-1,8-diazabicycloundec-7-ene alginic acid proton type ionic liquid precursor (A-DBU): Weigh 34.576g of DBU into 250ml In the flask, add 100ml of pure water, mix completely and add 40g of alginic acid. React at 100°C for 12 hours, and dry the solution in a lyophilizer for 48 hours. Use a pulverizer to pulverize into powder to prepare A-DBU alginic acid proton type ionic liquid precursor.

[0073] Preparation of nitrogen-doped porous carbon materials: 10 g of alginic acid-1,8-diazabicycloundec-7-ene alginic acid proton-type ionic liquid precursor was placed in a tube furnace under the condition of Ar, 500 ℃ carbonization for 1h, the heating rate is 5℃ / min, the argon gas flow rate is 200ml / min, after the temperature drops to room temperature, weigh 1.75g ​​sample, weigh 1.5g sample and 6g KOH to mix and grind, the ratio is KOH / sample =4:1, activate the carbon material at 800°C, and the activation time is 2h. ...

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Abstract

The invention discloses a method and application for preparing a nitrogen-doped porous carbon material. Based on the presence of carboxyl groups in the molecular structure of alginic acid, the present invention uses carboxyl groups to react with organic bases of different structures to prepare a series of alginic acid proton-type ionic liquids. The reaction is mild, and the algae can be adjusted simply and conveniently through the structure regulation of organic bases. The structure of the acid-protic ionic liquid achieves the purpose of regulating the nitrogen content and nitrogen type in the nitrogen-doped porous carbon material and its precursor. The in-situ nitrogen doping of alginic acid is carried out from the molecular level, which solves the problem of incompatibility between carbon and nitrogen sources. The key issue of control, and then realized the high-value utilization of nitrogen-containing carbon materials, successfully used alginic acid-based nitrogen-containing carbon materials as electrode materials alone, and successfully applied to the field of energy storage.

Description

technical field [0001] The invention relates to the technical field of material science, in particular to a method and application for preparing a nitrogen-doped porous carbon material. Background technique [0002] The development of human society and the rapid consumption of traditional energy have aroused people's attention to clean energy. Supercapacitors are widely used in many fields such as smart wear and new energy vehicles due to their advantages such as fast charging and discharging, high power density and cycle life. Carbon materials have the characteristics of high specific area, excellent conductivity, controllable pore size and low price, and have become the main materials for capacitor electrodes (a) LIU, A.Y. and M.L.COHEN, Science, 1989.245(4920): p.841-842.; b) Xia, Y. and R. Mokaya, Advanced Materials, 2004.16(17): p.1553-1558.). Synthesizing carbon materials with high energy density and cycle life to meet practical applications has become a research hots...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/05C01B32/318C01B32/348H01G11/26H01G11/32H01G11/86
CPCH01G11/26H01G11/32H01G11/86Y02E60/13
Inventor 徐芹芹程键谢海波吴复忠
Owner GUIZHOU UNIV
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