Preparation method of nitrogen doped porous carbon material and application of preparation method in supercapacitor

A nitrogen-doped porous carbon and supercapacitor technology, applied in the field of inorganic nanomaterials and electrochemistry, can solve the problems of low specific capacity and energy density, poor hydrophilicity, etc., and achieve low equipment requirements, uniform pore size distribution, high ratio The effect of surface area

Inactive Publication Date: 2017-04-26
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, carbon materials also have some problems in the application process, such as poor hydrophilicity, relatively low specific capacity and energy density, etc.

Method used

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  • Preparation method of nitrogen doped porous carbon material and application of preparation method in supercapacitor
  • Preparation method of nitrogen doped porous carbon material and application of preparation method in supercapacitor
  • Preparation method of nitrogen doped porous carbon material and application of preparation method in supercapacitor

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Embodiment 1

[0030] A preparation method of a nitrogen-doped porous carbon material and its application in a supercapacitor, comprising the following steps: first dissolving polyvinylpyrrolidone and zinc chloride in a 1:2 ratio (mass ratio) in a 0.1 mole dilute hydrochloric acid solution, Stir for 4 hours, then evaporate the solvent to dryness under reduced pressure, activate for 4 hours at 500 ° C under the protection of nitrogen atmosphere, after natural cooling, wash in 1 mole of hydrochloric acid solution for 48 hours, and then wash with deionized water to neutral pH properties, and dried to obtain nitrogen-doped porous carbon materials. The nitrogen-doped porous carbon material has a specific surface area of ​​1040 m 2 / g, the pore size distribution is uniform, about 0.2-1.0nm, and the nitrogen content is 8.7%.

[0031] As shown in the attached picture, figure 1 It is the nitrogen adsorption-desorption curve of the nitrogen-doped porous carbon material obtained in Example 1. As can ...

Embodiment 2

[0033] A preparation method of a nitrogen-doped porous carbon material and its application in a supercapacitor, comprising the following steps: first dissolving polyvinylpyrrolidone and zinc chloride in a 1:3 ratio (mass ratio) in a 0.1 mole dilute hydrochloric acid solution, Stir for 8 hours, then evaporate the solvent to dryness under reduced pressure, and activate it at 600°C for 2 hours under the protection of nitrogen atmosphere. properties, and dried to obtain nitrogen-doped porous carbon materials. The nitrogen-doped porous carbon material has a specific surface area of ​​862m 2 / g, the nitrogen content is 6.4%.

Embodiment 3

[0035] A preparation method of a nitrogen-doped porous carbon material and its application in a supercapacitor, comprising the following steps: first dissolving polyvinylpyrrolidone and zinc chloride in a 1:4 ratio (mass ratio) in a 0.1 mole dilute hydrochloric acid solution, Stir for 2 hours, then evaporate the solvent to dryness under reduced pressure, and activate it at 700°C for 6 hours under the protection of nitrogen atmosphere. properties, and dried to obtain nitrogen-doped porous carbon materials. The nitrogen-doped porous carbon material has a specific surface area of ​​786 m 2 / g, the nitrogen content is 4.6%.

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Abstract

The invention belongs to the fields of inorganic nano-materials and electrochemistry and particularly provides a preparation method of a nitrogen doped porous carbon material and application of the preparation method in supercapacitors. The preparation method comprises the following steps that a nitrogen-containing polymer and Lewis acid are dissolved in an acid solution in proportion, stirring is performed for 1-8 hours, then drying is performed by distillation, activation is performed under inert atmosphere protection at the temperature of 400-1000 DEG C for 1-24 hours, natural cooling is performed, then washing is performed by using the acid solution, then washing is performed with deionized water to make PH neutral, and drying is performed to obtain the nitrogen doped porous carbon material. Compared with the prior art, the preparation method of the nitrogen doped porous carbon material has low device requirement and is simple, and large-scale production is promoted. The prepared nitrogen doped porous carbon material is high in nitrogen content, has high specific surface area and uniform pore diameter distribution and has very high application value in the aspects such as batteries and capacitor electrode materials.

Description

[0001] [technical field] [0002] The invention belongs to the field of inorganic nanometer materials and electrochemistry, in particular to a preparation method of nitrogen-doped porous carbon material and its application in supercapacitors. [0003] [Background technique] [0004] As a unique electrical energy storage device, supercapacitor is an important bridge connecting secondary batteries and traditional capacitors, and has attracted global attention due to its wide range of applications and huge market. At present, the main challenges restricting the further development of supercapacitors include insufficient energy density and high cost. Therefore, the research and development of supercapacitors with high energy density, long life and low cost is a technical bottleneck that needs to be solved urgently. Electrode material is considered to be the most important factor in determining the performance of supercapacitors. [0005] Carbon materials have the advantages of goo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348H01G11/86H01G11/24H01G11/34
CPCY02E60/13H01G11/86C01P2004/04C01P2006/12C01P2006/17C01P2006/40H01G11/24H01G11/34
Inventor 韩生韦焕明蔺华林江新泽付宁兰国贤刘金宝钱炜陈海军刘玉萍余伟萍冯晨萁喻宁波
Owner SHANGHAI INST OF TECH
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