Preparation method for nitrogen-containing hierarchical porous carbon nano tube film

A technology of hierarchical porous carbon and nanotube membranes, applied in the direction of carbon nanotubes, nanocarbons, nanotechnology, etc., can solve the problems that the fiber space cannot be fully utilized, the pore structure cannot be effectively regulated, and the uncontrollability can achieve mass transfer. Improved performance and channel utilization, elimination of adverse effects, and low cost effects

Active Publication Date: 2019-02-05
华光高科特种材料(大连)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, on the one hand, the above-mentioned activation process is uncontrollable, which makes it impossible to effectively control the activated pore structure; on the other hand, the pores on the activated CNF are mainly distributed on the surface of the fiber, and the space inside the fiber cannot be fully utilized.

Method used

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  • Preparation method for nitrogen-containing hierarchical porous carbon nano tube film
  • Preparation method for nitrogen-containing hierarchical porous carbon nano tube film
  • Preparation method for nitrogen-containing hierarchical porous carbon nano tube film

Examples

Experimental program
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Effect test

Embodiment 1

[0109] According to one embodiment of the present application, Zn(acac) 2 Dissolved in N,N-dimethylformamide simultaneously with polyacrylonitrile as spinning solution, wherein polyacrylonitrile and Zn(acac) in spinning solution 2 The mass fractions of both are 10%, stirred at 70°C for 24h to fully dissolve to obtain a clear and transparent solution. Then the above-mentioned solution of 10mL is placed in the syringe, under the condition of 10KV voltage, 25 ℃, relative humidity 10%, carry out spinning, the distance of syringe needle point and receiving plate is 5cm, obtains containing Zn(acac) 2 polyacrylonitrile nanofiber membrane. The resulting Zn(acac) 2 The polyacrylonitrile nanofiber membrane was pre-oxidized in air at 300°C for 2h, then calcined in air at 1000°C for 2h to remove polyacrylonitrile, and dried to obtain a ZnO nanofibrous web.

[0110] Place the above ZnO nanofibrous web in 100mL, 3mol / L dimethylimidazole solution (solvent is N,N-dimethylformamide), soak a...

Embodiment 2

[0112] According to one embodiment of the present application, Zn(acac) 2 Dissolve in water with polyvinyl alcohol as a spinning solution, wherein polyvinyl alcohol and Zn(acac) in the spinning solution 2 The mass fraction of each is 15%, stirred at 80°C for 24h to fully dissolve to obtain a clear and transparent solution. Then the above-mentioned solution of 10mL is placed in the syringe, under the condition of 15KV voltage, 30 ℃, relative humidity 10%, carry out spinning, the distance of syringe needle point and receiving plate is 10cm, obtains containing Zn(acac) 2 polyvinyl alcohol nanofiber membrane. The resulting Zn(acac) 2 The polyvinyl alcohol nanofiber membrane was pre-oxidized in air at 250°C for 2h, then calcined in air at 800°C for 1.5h to remove polyvinyl alcohol, and dried to obtain a ZnO nanofibrous web.

[0113] Place the above ZnO nanofibrous web in 100mL, 2mol / L dimethylimidazole solution (solvent is N,N-dimethylformamide), soak at 80°C for 20h, and dry to...

Embodiment 3

[0115] According to one embodiment of the present application, the Ni(NO 3 ) 2 Dissolved in N,N-dimethylformamide simultaneously with polyacrylonitrile as spinning solution, wherein polyacrylonitrile and Ni(NO 3 ) 2 The mass fraction of each is 20%, stirred at 70°C for 24h to fully dissolve to obtain a clear and transparent solution. Then put 8mL of the above-mentioned solution into the syringe, spin at 20KV voltage, 20°C, and 20% relative humidity, the distance between the needle tip of the syringe and the receiving plate is 10cm, and the Ni(NO 3 ) 2 polyacrylonitrile nanofiber membrane. The resulting Ni(NO 3 ) 2 The polyacrylonitrile nanofiber membrane was pre-oxidized in air at 300°C for 3h, then calcined in air at 900°C for 2h to remove polyacrylonitrile, and dried to obtain a NiO nanofiber web.

[0116] The above-mentioned NiO nanofiber web was placed in 150mL, 1mol / L benzimidazole solution (solvent is absolute ethanol), soaked at 70°C for 24h, and dried to obtain ...

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Abstract

The invention discloses a preparation method for a nitrogen-containing hierarchical porous carbon nano tube film. According to the preparation method, the nitrogen-containing hierarchical porous carbon nano tube film is prepared by taking a high-molecular polymer nanofiber membrane containing metal salt as a template and taking metal organic frameworks as a carbon source. The preparation method issimple and has the advantages that the prepared nitrogen-containing hierarchical porous carbon nano tube film has self-supporting characteristics and can be directly used as a positive electrode of alithium-air battery, the adverse effect of an adhesive on the performance of the battery is eliminated, meanwhile, the specific discharge capacity and the cycling stability are high, in addition, themass transfer performance is greatly improved, the pore passage utilization rate is greatly increased, the preparation performance is excellent, a process is simple, the process repeatability is good, the cost is low, the environment is protected, and the like.

Description

technical field [0001] The application relates to a method for preparing a nitrogen-containing hierarchically porous carbon nanotube film, which belongs to the field of preparation methods and applications of carbon materials. Background technique [0002] With the rapid development of the economy and the rapid expansion of the population, the human demand for energy is increasing day by day. The traditional energy structure dominated by fossil energy has not only caused a huge waste of resources, but also brought serious environmental pollution. It is an inevitable choice for the development of human society to reduce dependence on fossil energy, vigorously develop renewable energy, and increase its proportion in energy consumption. In order to realize the efficient utilization of renewable energy, it is crucial to develop efficient energy storage (energy storage) technologies. Among various energy storage technologies, lithium-ion batteries have developed rapidly in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02C01B32/16H01M4/587H01M12/08B82Y30/00
CPCB82Y30/00C01B32/16C01G9/02C01P2004/03C01P2004/04C01P2004/16C01P2006/40H01M4/587H01M12/08Y02E60/10
Inventor 聂红娇郑秀文徐东平于跃
Owner 华光高科特种材料(大连)有限公司
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