Preparation method of nitrogen-oxygen-doped carbon nanotubes/porous carbon

[0035] Example 1:

[0036] A preparation method of nitroxide-doped carbon nanotube / porous carbon includes: providing aniline monomer to polymerize to form polyaniline particles, carburizing the polyaniline particles to obtain a precursor tablet, and pre-oxidizing the precursor tablet Treatment and high temperature pyrolysis treatment. The nitrogen and oxygen atoms in the composite carbon material introduce the electron acceptor characteristics into the composite carbon material structure to generate a pseudocapacitance reaction, increase the wettability of the electrode material and the electrolyte interface, and have a positive effect on the wetting of the porous carbon pore wall. The exposed surface of the composite carbon material further increases the charge storage capacity, so that the composite carbon material obtains a large specific capacity, high rate performance and excellent cycle stability.

[0037] The molar ratio of aniline and initiator ammonium persulfate for the p

[0046] Example 2:

[0047] A method for preparing nitrogen-oxygen-doped carbon nanotubes / porous carbon includes the following specific steps:

[0048] 1) Add aniline monomer to 8 times the amount of 0.1mol / L dilute hydrochloric acid solution and stir and dissolve to obtain mixed solution A, then stir and dissolve ammonium persulfate in 5 times the amount of 0.1mol / L dilute hydrochloric acid solution to obtain the mixed solution B. After cooling the two to 0℃ separately, pour mixed liquid B into mixed liquid A and stir for 3min, then magnetically stir for 8.5h in an ice bath at 0℃, then centrifuge the dark green precipitate, and use 0.1mol / L in turn Wash the aqueous ammonia solution and deionized water to neutrality. After the filtrate is colorless, dry it at 80°C to obtain polyaniline particles. The molar ratio of aniline to ammonium persulfate is 1.25:1;

[0049] 2) After mixing the obtained polyaniline particles with the carburizing agent, add 7 times the amount of absolute e

[0053] Example 3:

[0054] The difference between this embodiment and embodiment 2 is:

[0055] Step 5) Mix the quartz plate product and the quartz boat product evenly to obtain a mixed powder, then add a 2mol / L dilute nitric acid solution, stir ultrasonically at 90°C for 20 minutes, centrifuge, and wash the resulting precipitate with deionized water. Neutral, the filtrate is colorless and dried at 130°C to obtain the carbon nanotube / porous carbon composite carbon material doped with nitrogen and oxygen. The above dilute nitric acid solution contains 0.05 mM citric acid and 0.03 mM pentaerythritol, mixed in powder Under the action of ultrasound, the carbon nanotubes can easily bombard the carbon nanotubes to knock out carbon atoms. The carbon atoms stay in the interstitial positions of the lattice to produce interstitial atoms. The interstitial atoms will cause further defects in the carbon structure lattice and form on the composite carbon material. A small amount of disordered