N-rich mesoporous carbon material and template-free preparation method thereof as well as method for manufacturing working electrode and application of working electrode

Abstract

The invention discloses an N-rich mesoporous carbon material and a template-free preparation method thereof as well as a method for manufacturing a working electrode and an application of the working electrode, and belongs to the technical field of mesoporous carbon material preparation. In organic solvent, substituted dialdehyde and a melamine derivative are taken as building units; through heating reflux under the inert atmosphere, the building units are subject to the Schiff base reaction to obtain a mesoporous polyamid precursor, and are subject to the low-tempreature roasting under the inert atmosphere to be further carbonized to obtain N-rich mesoporous carbon; or the polyamid precursor is subject to one-step high-temperature carbonization to obtain N-rich mesoporous carbon. Through the adjusting of the structures of the substituted dialdehyde and the melamine derivative and the pyrolysis conditions of the polyamid precursor, the controllable synthesis of N-rich mesoporous carbon is achieved. The invention can achieve the template-free synthesis of the N-rich mesoporous carbon, and has the advantages of simplicity in operation, low cost and large-scale production. The optimized N-rich mesoporous carbon materials are made into an electrode which has a favorable capacitance performance, rapid current response and a stable cycle life under acidic and alkaline conditions.

Description

technical field [0001] The invention belongs to the technical field of mesoporous carbon material preparation, and specifically relates to a novel nitrogen-rich mesoporous carbon material, a preparation method and its application as an electrode material in an electrochemical capacitor. Background technique [0002] Mesoporous carbon materials have: (1) regular pore structure, uniform pore size / arrangement; (2) narrow pore size distribution, pore size can be continuously adjusted in a wide range; (3) large specific surface area and pore volume; (4) After optimized synthesis conditions or pretreatment, it can have good thermal and chemical stability; (5) The particles have a regular shape and maintain a high degree of pore order, so in recent years it has become One of the hot materials of international interdisciplinary research. The mesoporous carbon materials obtained by further functionalization will surely show more excellent performance and expand its practical applica...

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Problems solved by technology

It has been reported that the nitrogen-rich mesoporous carbon materials prepared by this method are still limited to aromatic cyano and cyanamide compounds, and the structure and composition of the nitrogen-rich mesoporous carbon materials prepared are still lacking in effective control ( Microscopic mesoporous structure, mesoporous surface atomic arrangement and orientation, mesoporous defects, etc.) (Fulvio, P.F.; Lee, J.S.; Mayes, R.T.; Wang, X.; Mahurin, S.M.; Dai, S., Boron and nitrogen-rich carbons from ionic liquid precursors with tailorable surface properties.Physical Chemistry Chemical Physics2011,13(30),13486-13491)

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