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Preparation method and application of nitrogen-doped porous carbon fiber material

A nitrogen-doped porous carbon and fiber material technology, applied in the chemical characteristics of fibers, the manufacture of conductive/antistatic filaments, the manufacture of hybrid/electric double-layer capacitors, etc. Improved conductivity and surface hydrophilicity, good electrochemical performance, and rich pore structure

Active Publication Date: 2020-06-05
BEIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the porous carbon materials with high specific surface area prepared by other researchers are powder or self-supporting blocks, which do not have the characteristics of one-dimensional carbon fiber structure.

Method used

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  • Preparation method and application of nitrogen-doped porous carbon fiber material
  • Preparation method and application of nitrogen-doped porous carbon fiber material
  • Preparation method and application of nitrogen-doped porous carbon fiber material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A preparation method of nitrogen-doped porous carbon fiber material, specifically comprising the steps of:

[0045] (1) Weigh 0.7g polyacrylonitrile and 0.7g polyvinylpyrrolidone according to the mass ratio of 1:1, put them into 10mL N,N dimethylformamide solution and magnetically stir for 12h to fully dissolve;

[0046] (2) After dissolving, use an 18G needle to squeeze the mixed solution into deionized water, soak at room temperature and let stand for 12 hours;

[0047] (3) Place the soaked sample in 1mol L -1 Soak in the potassium hydroxide solution at room temperature for 12 hours;

[0048] (4) Take out the fibers and put them in the refrigerator to freeze at -18°C for 12 hours, and finally take out the samples and put them in a vacuum freeze dryer, and freeze them at -55°C for 16 hours.

[0049] (5) The freeze-dried sample was put into a tube furnace for calcination, and was heated at 1°C min in an air atmosphere. -1 The temperature was raised to 270°C at a spee...

Embodiment 2

[0058] The difference between this example and Example 1 is that in step (1), the polyacrylonitrile macromolecule and polyvinylpyrrolidone macromolecular mass are weighed to be 0.5g and 0.5g respectively;

Embodiment 3

[0060] The difference between this example and Example 1 is that in the step (1), the polymer weights of polyacrylonitrile and polyvinylpyrrolidone are weighed to be 0.7 g and 0.35 g respectively. Others are the same as in Example 1.

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Abstract

The invention discloses a preparation method and application of a nitrogen-doped porous carbon fiber and belongs to the technical field of preparation of porous carbon fiber materials. The preparationmethod comprises the following steps of firstly, preparing a polyacrylonitrile / polyvinylpyrrolidone spinning precursor solution, then obtaining a porous polyacrylonitrile fiber through a wet spinningmethod by utilizing different solubilities (phase separation) of the polyacrylonitrile and the polyvinylpyrrolidone in an aqueous solution, soaking and activating the obtained porous polyacrylonitrile fiber in a potassium hydroxide solution, taking the polyacrylonitrile as a carbon source and a nitrogen source, and carrying out one-step high-temperature carbonization activation treatment in an inert atmosphere to obtain the nitrogen-doped porous carbon fiber. The porous carbon fiber material has a hierarchical porous carbon skeleton structure with high specific surface area, high nitrogen content and mutual crosslinking, a fast channel is provided for electron transmission, the ion diffusion distance is shortened, the wettability and conductivity of the material are increased, and good electrochemical performance is shown. The preparation process is simple, the equipment dependence is low, and the method is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of preparation of porous carbon fiber materials, and more specifically relates to a preparation method and application of nitrogen-doped porous carbon fiber materials. Background technique [0002] With the continuous development of human science and technology, people's demand for portable energy storage devices is becoming more and more extensive. As an ideal energy storage device, supercapacitors (also known as electrochemical capacitors and electric double layer capacitors) are currently widely used in electronics, electrical appliances, Communications, automobiles, aerospace, aviation and other fields. The performance of supercapacitors depends on the properties of the electrode materials used. At present, the electrode materials of supercapacitors mainly include carbon materials, metal oxides and conductive polymers. Carbon materials have attracted much attention due to their advantages of low cost,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/22D01F1/09H01G11/34H01G11/40H01G11/86
CPCD01F9/22D01F1/09H01G11/34H01G11/40H01G11/86Y02E60/13
Inventor 张鑫李奇琛盛利志时君友
Owner BEIHUA UNIV
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