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
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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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