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Preparation method of nitrogen-doped porous carbon material

A technology for nitrogen-doped porous carbon and weathered coal, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of complex preparation process, high production cost, non-adjustable pore size, etc., and achieve rich sources and ash content. Low, improve the effect of carbonization yield

Active Publication Date: 2022-05-20
NINGBO CRRC NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to propose a simple method for preparing nitrogen-doped porous carbon materials to solve the defects of complex preparation process, high production cost and non-adjustable pore diameter of nitrogen-doped porous carbon materials

Method used

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  • Preparation method of nitrogen-doped porous carbon material
  • Preparation method of nitrogen-doped porous carbon material
  • Preparation method of nitrogen-doped porous carbon material

Examples

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Effect test

Embodiment 1

[0047] The preparation method of nitrogen-doped porous carbon material in this embodiment includes the following steps:

[0048] (1) Dissolve 100g of urea and 125g of potassium carbonate in 725g of water to form a mixed aqueous solution, then add 50g of purified weathered coal humic acid, stir for 2 hours, and put it into a blast drying oven for drying at 80°C;

[0049] (2) Put the sample dried in step (1) into an activation furnace, and raise it to 800°C at a rate of 2°C / min for 4 hours;

[0050] (3) Cool naturally after high-temperature calcination, take out the sample, wash 5 times with deionized water, and dry in a blast drying oven at 90° C. for 24 hours to obtain a nitrogen-doped porous carbon material.

Embodiment 2

[0052] The preparation method of nitrogen-doped porous carbon material in this embodiment includes the following steps:

[0053] (1) Dissolve 75g of urea and 100g of potassium carbonate in 725g of water to form a mixed aqueous solution, then add 45g of purified weathered coal humic acid, stir for 2.5 hours, and put it into a blast drying oven for drying at 85°C;

[0054] (2) Put the sample dried in step (1) into an activation furnace, and raise it to 850°C at a rate of 3°C / min for 3 hours;

[0055] (3) Cool naturally after high-temperature calcination, take out the sample, wash with deionized water 4 times, and dry in a blast drying oven at 85° C. for 22 hours to obtain a nitrogen-doped porous carbon material.

Embodiment 3

[0057] The preparation method of nitrogen-doped porous carbon material in this embodiment includes the following steps:

[0058] (1) Dissolve 50g of urea and 75g of potassium carbonate in 675g of water to form a mixed aqueous solution, then add 40g of purified weathered coal humic acid, stir for 3 hours, and put it into a blast drying oven at 90°C for drying;

[0059] (2) Put the sample dried in step (1) into an activation furnace, and raise it to 850°C at a rate of 4°C / min for 4 hours;

[0060] (3) Cool naturally after high-temperature calcination, take out the sample, wash with deionized water for 3 times, and dry at 80° C. for 20 h in a blast drying oven to obtain a nitrogen-doped porous carbon material.

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Abstract

The invention belongs to the technical field of porous carbon materials, and particularly relates to a preparation method of a nitrogen-doped porous carbon material and application of the nitrogen-doped porous carbon material in a supercapacitor. The nitrogen-doped porous carbon material is prepared by taking weathered coal humic acid as a carbon material precursor, urea as a nitrogen source and a potassium metal compound as an active agent through high-temperature reaction, and when the nitrogen-doped porous carbon material is applied to an electrode material of a supercapacitor, the supercapacitor shows excellent electrochemical performance. The initial raw materials are humic acid and urea which widely exist in nature and are low in price and rich in source, and the method only relates to a small number of procedures such as activation and cleaning, so that large-scale industrial production is easy to realize.

Description

Technical field: [0001] The invention belongs to the technical field of porous carbon materials, and in particular relates to a preparation method of nitrogen-doped porous carbon materials and its application in supercapacitors. Background technique: [0002] Supercapacitors, also known as electrochemical capacitors, are efficient and stable energy storage devices that combine the high-power discharge of traditional capacitors with the high energy density of batteries. Because of its advantages such as good electrochemical stability, high energy density, fast charge and discharge speed, and long cycle life, it is expected to become the main force for power supplementation of electronic equipment in the fields of wearable devices, electric vehicles, and aerospace. Electrode materials play a central role in supercapacitors and are the key points to improve the electrochemical performance of supercapacitors. [0003] Common electrode materials include metal oxides, conductive ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348C01B32/318H01G11/34H01G11/44
CPCC01B32/348C01B32/318H01G11/34H01G11/44Y02E60/13
Inventor 卢颖莉荆葛王恒冯冬梅乔志军刘丛刚
Owner NINGBO CRRC NEW ENERGY TECH CO LTD
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