Preparation method of nitrogen functionalized microporous carbon nanoparticle

Abstract

The invention relates to a preparation method of a nitrogen functionalized microporous carbon nanoparticle. The preparation method comprises the following steps: weighing m-phenylenediamine, terephthalaldehyde, 1,4-dioxane and 3mol / L acetum according to the mass ratio of 1: 0.6-2.5: 24-192: 1.7-6.7 and mixing uniformly; putting the mixed solution in a stainless steel reaction kettle and carrying out heat treatment at 120 DEG C for 2-4 days to obtain a nitrogen-containing polymer; and carrying out inert gas shielding in a tube furnace, heating the nitrogen-containing polymer at a heating rate of 0.5-10 DEG C / min to 700-900 DEG C for carbonization and finally naturally cooling to the room temperature to obtain the nitrogen functionalized microporous carbon nanoparticle. The prepared nitrogen functionalized microporous carbon nanoparticle has the advantages of high specific surface area, regular micropores, nitrogen functional group and spherical geometrical morphology; and when used as an electrode of a super capacitor, the nitrogen functionalized microporous carbon nanoparticle is capable of improving the high-current charging / discharging performance of the electrode while effectively keeping the high specific capacitance.

Description

technical field [0001] The invention relates to a preparation method of nitrogen functionalized microporous carbon nanoparticles. When the nitrogen-functionalized microporous carbon nanoparticle is used to make an electrode material for a supercapacitor, it can effectively maintain a high specific capacitance while improving the high-current charging and discharging performance of the electrode. It belongs to the technical field of material preparation. Background technique [0002] Supercapacitor is a new type of green energy storage device with high energy density, long cycle life and short charging time. It has extremely wide applications in electric vehicles, uninterruptible power supplies, aerospace, military and many other fields. Microporous carbon materials (such as activated carbon) have become a commonly used electrode material for supercapacitors due to their high specific surface area, good chemical stability, low cost, and simple preparation methods. For examp...

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Problems solved by technology

For example, Chen et al. reported "a method for preparing nitrogen-doped porous carbon nanofibers as an efficient electrode material for supercapacitors by carbonizing carbon nanofibers coated with polysalle at high temperature" (Synthesis of nitrogen-doped porous carbon nanofibers as an efficient electrode material for supercapacitors, ACS Nano, 2012, 6, 7092-7102.), this method of preparing carbon materials first and then performing nitrogen functionalization is cumbersome and time-consuming

Liu et al prepared porous hollow carbon materials with good electrochemical properties through the Schiff base reaction between p-phenylenediamine and trimellitic formaldehyde (Hollow, spherical nitrogen-rich porous carbon shells obtained from a porous organic framework for the supercapacitor, Appl.Mater.Interfaces,2013,5,10280-10287.), the nitrogen functionalized raw material used in this method is very expensive, which limits its practical application