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Porous nitrogen-doped carbon/carbon nanotube composite material, preparation method thereof and application

A technology of nitrogen-doped carbon and composite materials, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of high cost, complicated preparation process, unfavorable commercial application, etc., and achieve low cost and simple process Effect

Active Publication Date: 2018-05-22
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In these composite materials, CNTs are usually first prepared by chemical vapor deposition, and then oxides, sulfides, or composites with conductive polymers and graphene are grown on CNTs. The preparation process is complicated and costly, which is not conducive to commercial application

Method used

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  • Porous nitrogen-doped carbon/carbon nanotube composite material, preparation method thereof and application
  • Porous nitrogen-doped carbon/carbon nanotube composite material, preparation method thereof and application
  • Porous nitrogen-doped carbon/carbon nanotube composite material, preparation method thereof and application

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Weigh 2000 parts of FeCl 3 ·6H 2 O and 300 parts of methyl orange dissolve 160 parts of H 2 O, then added 0.7 parts of pyrrole monomer, reacted for 24 h, filtered, washed and dried to obtain polypyrrole nanotubes. Weigh 900 parts of Zn(NO 3 ) 2 ·6H 2 O dissolved in 30 parts H 2 O, add 150 parts of polypyrrole nanotubes and 100 parts of PVP, and ultrasonically disperse for 30 min to obtain mixed solution A; weigh 2000 parts of 2-methylimidazole and dissolve in 30 parts of H 2 O, then slowly add this solution into solution A, stir magnetically for 2 h, filter, wash and dry to obtain polypyrrole nanotubes / ZIF-8; transfer polypyrrole nanotubes / ZIF-8 to a ceramic crucible, place Tube Furnace, in N 2 Under protection, carbonize at 700 °C for 3 h; soak the obtained carbon material in 1 M HCl solution for 10 h, filter, and obtain porous nitrogen-doped carbon / carbon nanotube composites. The specific surface area of ​​the material is 527 m 2 g -1 . After testing, the c...

Embodiment 2

[0034] Weigh 2800 parts of FeCl 3 ·6H 2 O and 350 parts methyl orange dissolve 150 parts H 2 O, then add 0.5 parts of pyrrole monomer, react for 12 h, filter, wash and dry to obtain polypyrrole nanotubes. Weigh 800 parts of Zn(NO 3 ) 2 ·6H 2 O dissolved in 30 parts H 2 O, add 100 parts of polypyrrole nanotubes and 100 parts of PVP, and ultrasonically disperse for 60 min to obtain mixed solution A; weigh 2000 parts of 2-methylimidazole and dissolve in 30 parts of H 2 O, then slowly add the solution to solution A, stir magnetically for 4 h, filter, wash and dry to obtain polypyrrole nanotubes / ZIF-8; transfer polypyrrole nanotubes / ZIF-8 to a ceramic crucible, place Tube Furnace, in N 2 Under protection, carbonize at 800 °C for 2 h; soak the obtained carbon material in 3 M HCl solution for 12 h, filter, and obtain porous nitrogen-doped carbon / carbon nanotube composites.

[0035] SEM images show that the material forms a composite structure of porous carbon particles wrappe...

Embodiment 3

[0037] Weigh 3000 parts FeCl 3·6H 2 O and 250 parts of methyl orange were dissolved in 200 mL of H 2 O, then add 1 part of pyrrole monomer, react for 12 h, filter, wash and dry to obtain polypyrrole nanotubes. Weigh 800 parts of Zn(NO 3 ) 2 ·6H 2 O dissolved in 00 parts H 2 O, add 50 parts of polypyrrole nanotubes and 100 parts of PVP, and ultrasonically disperse for 30 min to obtain mixed solution A; weigh 2500 parts of 2-methylimidazole and dissolve in 30 parts of H 2 O, then slowly add the solution to solution A, stir magnetically for 12 h, filter, wash and dry to obtain polypyrrole nanotubes / ZIF-8; transfer polypyrrole nanotubes / ZIF-8 to a ceramic crucible, place For tube furnaces, at N 2 Under protection, carbonize at 900 °C for 1 h; soak the obtained carbon material in 2 M HCl solution for 24 h, filter, and obtain porous nitrogen-doped carbon / carbon nanotube composites.

[0038] The material has a specific surface area of ​​632 m 2 g -1 . After testing, the co...

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Abstract

The invention discloses a porous nitrogen-doped carbon / carbon nanotube composite material, a preparation method thereof and the application in a super capacitor. The method comprises steps: (1) methylorange, ferric chloride and pyrrole are used to prepare polypyrrole nanotubes as a substrate, and in-situ reaction is carried out on the surface of the polypyrrole nanotubes to form a layer of metalorganic framework material (zeolite imidazole framework material 8, and ZIF-8 in short); (2) precursor powder is carbonized for 1 to 3 h under 700 to 1000 DEG C at a nitrogen or argon protection atmosphere; and (3) the obtained composite material is immersed by dilute hydrochloric acid for 5 to 24 h, filtering and drying are carried out, and a porous nitrogen-doped carbon / carbon nanotube compositematerial is acquired. Through adjusting process parameters, the high-specific surface area porous nitrogen-doped carbon / carbon nanotube composite material can be acquired. The process is simple, thecost is low, and industrial production is easy.

Description

technical field [0001] The invention relates to a porous nitrogen-doped carbon / carbon nanotube composite material and its preparation method and application, belonging to the technical field of new energy materials. Background technique [0002] Carbon nanotubes (CNTs) have the advantages of unique hollow structure, good electrical conductivity and chemical stability, pores suitable for electrolyte ion migration, and intertwining to form a nanoscale network structure, so as electrode materials, they can significantly improve the performance of supercapacitors. It is considered to be an ideal supercapacitor electrode material due to its power characteristics. [0003] Supercapacitors, also known as electrochemical capacitors, are a new type of energy storage element between traditional capacitors and batteries. Compared with traditional capacitors, they have higher specific capacitance and energy density, and compared with batteries, they have High power density. Due to the...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/30H01G11/44H01G11/36H01G11/38H01G11/86
CPCH01G11/24H01G11/30H01G11/36H01G11/38H01G11/44H01G11/86Y02E60/13
Inventor 王延忠王慧奇陈优王东华李莹刘炜薛超瑞董英鸽杨金龙
Owner ZHONGBEI UNIV
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