Large current charge/discharge nitrogen-oxygen co-doped spherical/sheet-like porous carbon material and application thereof in supercapacitor electrode material

Abstract

The invention relates to a large current charge / discharge nitrogen-oxygen co-doped spherical / sheet-like porous carbon material and applications thereof in a supercapacitor electrode material. The method comprises the following steps that S1, hexabromobenzene and pyridine are subjected to a closed reaction under the reaction pressure higher than the atmospheric pressure; s2, after the reaction is finished, the pressure is relieved to normal pressure, the reaction products are naturally cooled to room temperature, the obtained solid is washed, and vacuum drying is carried out to obtain a dried sample; and S3, high-temperature treatment is carried out on the dried sample under the protection of inert gas to obtain the nitrogen-oxygen co-doped spherical / sheet-like porous carbon material. The nitrogen-oxygen co-doped spherical / sheet-like porous carbon material has excellent electrical properties, and can be applied to the field of supercapacitors. The material can support large-current charging and discharging when applied to a supercapacitor, and can be synthesized in a macro manner. The method is simple in process and excellent in performance, and has good application prospect and industrialization potential.

Description

technical field [0001] The present invention relates to a kind of composite material and its preparation method and application, specifically to a kind of supercapacitor electrode material and its preparation method of nitrogen and oxygen co-doped ball / sheet porous carbon material for high current charge and discharge. Background technique [0002] Supercapacitor is a new type of energy storage device. It has the advantages of high output power, short charging time, long service life, wide operating temperature range, safety and no pollution. It is called "green energy storage device". [0003] Carbon materials, especially heteroatom-doped carbon materials, have the characteristics of high specific surface area and high conductivity. Supercapacitors prepared with them have the characteristics of high power density and long cycle life, and are rich in resources, diverse in structure, and low in cost. [0004] But on the other hand, carbon nanomaterials used as electrode mater...

AI Technical Summary

Problems solved by technology

Capacitors assembled from materials prepared by this method have unsatisfactory capacity under high current

[0008] As mentioned above, various methods for preparing nitrogen-oxygen-doped carbon materials have been reported in existing patents, and thus a variety of new carbon materials with high performance have been obtained, but these carbon materials usually fail under high-rate conditions. Rapid decay occurs, and even this is difficult to function at higher current densities (>100A / g)

In addition, these synthetic methods also have high cost and difficulty in macro-preparation, which seriously limit their practical application and industrial production.

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