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Preparation method for nanoporous carbon

A nano-pore and pore-making technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of large pores and low specific capacity, and achieve good wettability, excellent performance, and simple preparation methods. Effect

Active Publication Date: 2017-04-26
ZHANGJIAGANG SMARTGRID FANGHUA ELECTRICAL ENERGY STORAGE RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has large pores and low specific capacity when used in energy storage devices such as supercapacitors.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] At room temperature, take 10g of novolac resin, 0.5g of hexamethylenetetramine, 0.5g of polyvinyl butyral, and 0.5g of ammonium pyrophosphate and mix them pneumatically to make the resin carbon source, curing agent, and pore-forming template Agents and proppants are completely and evenly mixed. The above mixture was gradually added to 10 g of ethanol aqueous solution (the volume ratio of absolute ethanol to water was 80%:20%), and stirred thoroughly to form a gel. Heat the above gel to 150ºC for 1 hour to fully cure. The above solidified material is desolventized and crushed at 150°C to obtain dry gel powder. Collect 20~100 mesh xerogel powder and place it in a nickel boat, put it in a muffle furnace (empty atmosphere), heat it at a speed of 10ºC / min to 170ºC for 30min, and obtain a pretreated material. Put the pretreated material into a tube furnace, use high-purity nitrogen as the protective gas (linear flow rate 5cm / min), raise the temperature to 700ºC at a rate of...

Embodiment 2

[0030] At room temperature, take 10g of novolac resin, 1g of hexamethylenetetramine, 4.5g of polyvinyl butyral, and 5.5g of ammonium pyrophosphate and mix them pneumatically to make the resin carbon source, curing agent, and pore-forming template agent , The proppant is completely and evenly mixed. The above mixture was gradually added to 100 g of aqueous ethanol (the volume ratio of absolute ethanol to water was 80%:20%), and stirred thoroughly to form a gel. Heat the above gel to 150ºC for 1 hour to fully cure. The above solidified material is desolventized and crushed at 150°C to obtain dry gel powder. Collect 20~100 mesh xerogel powder and place it in a nickel boat, put it in a muffle furnace (air atmosphere), heat it at a rate of 10ºC / min to 330ºC for 30 minutes, and obtain a pretreated material. Put the pretreated material into a tube furnace, use high-purity nitrogen as the protective gas (linear flow rate 5cm / min), raise the temperature to 1000ºC at a rate of 5ºC / min...

Embodiment 3

[0032] At room temperature, take 5g novolak resin and 5g polyacrylonitrile resin, 0.5g hexamethylenetetramine and 0.5g aniline, 1.5g polyvinyl butyral and 3g sodium alginate, 1.5g ammonium pyrophosphate and 4g Nickel dihydrogen pyrophosphate is pneumatically pulverized and mixed together, so that the resin carbon source, curing agent, pore-forming template agent, and proppant are completely and evenly mixed. The above mixture was gradually added to 100 g of dimethylformamide aqueous solution (the volume ratio of dimethylformamide to water was 80%:20%), and stirred thoroughly to form a gel. Heat the above gel to 80ºC and keep it constant for 1 hour to fully cure. The above solidified material was desolventized and crushed under reduced pressure at 120°C to obtain dry gel powder. Collect 20-100 mesh xerogel powder and place it in a nickel boat, and place it in a muffle furnace preheated to 330ºC (air atmosphere) for 30 minutes to obtain a pretreated material. Put the pretreate...

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Abstract

The invention relates to a preparation method for nanoporous carbon. The preparation method comprises the following steps: dissolving a resin carbon source, a curing agent, a pore-forming template agent and a proppant with a solvent, and performing gelatination and curing at 0 to 150 DEG C to obtain a cured material; removing the solvent from the cured material, crushing the cured material into granules of 20 to 100 meshes, and performing heating treatment on the granules in an air atmosphere or oxygen atmosphere of 170 to 330 DEG C to obtain a pretreated material; placing the pretreated material in a carbonization reaction chamber, controlling the temperature to rise to 700 to 1,000 DEG C under gas protection at the rate of 1 to 15 DEG C per min, performing constant temperature treatment for 30 to 300min at a temperature rising endpoint, and performing cooling to room temperature to obtain the nanoporous carbon. The nanoporous carbon prepared by the method has the advantages of simplicity of the preparation method, easiness for regulation and control of pore diameters and the like, has a pore diameter adjustable within the range of 0.5 to 100nm and a specific surface area of 600 to 1,600m<2> / g, and can be used for an electrode material of a super capacitor, an electrode material of a lithium ion battery, an electrode material of capacitive desalination equipment, blood purification, a catalyst carrier, water treatment, gas purification, solvent recovery and the like.

Description

technical field [0001] The invention relates to a method for preparing carbon materials and its application, and relates to a method for preparing nanoporous carbon. The nanoporous carbon thus prepared has a thickness of 600-1600m 2 / g specific surface area, good conductivity, can be used as a catalyst carrier, and can also be used as an electrode material for electrochemical capacitors and lithium-ion batteries. Background technique [0002] Porous carbon materials refer to carbon materials with different pore structures, and the pore size has a wide range, which can be adjusted by different technical means. Due to the characteristics of developed pores, high specific surface area, high pore volume, and adjustable pore size within a certain range, porous carbon materials have been widely used as an adsorption material in water purification, gas separation, solvent recovery, decolorization and other fields. It can be used as catalyst carrier, lithium ion battery, electrode ...

Claims

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Application Information

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IPC IPC(8): C01B32/318H01G11/36H01G11/44
CPCY02E60/13H01G11/36C01P2006/12C01P2006/14C01P2006/17C01P2006/40H01G11/44
Inventor 程杰姚寿广申亚举杨裕生
Owner ZHANGJIAGANG SMARTGRID FANGHUA ELECTRICAL ENERGY STORAGE RES INST
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