Preparation and application of nitrogen-doped porous carbon material

Abstract

The invention discloses a nitrogen-doped porous carbon material. The nitrogen-doped porous carbon material is prepared through low-temperature carbonization treatment on ginkgo leaves and calcined activation of the processed ginkgo leaves with nitrogenous compounds and alkali inorganic matters. The range of the specific surface area of the nitrogen-doped porous carbon material is 888-1132 m2g-1, and the pore size is uniform in distribution within the range of 1.20-2.13 nm. The preparation method of the nitrogen-doped porous carbon material comprises 1) performing low-temperature carbonizationon the ginkgo leaves to obtain a carbon precursor; 2) activating the carbon precursor; 3) performing aftertreatment on an obtained nitrogen-doped carbon material. The invention also discloses application of the nitrogen-doped porous carbon material as a supercapacitor material. When the electric current density is 1 A g-1, the range of the specific capacitance of the nitrogen-doped porous carbon material is 254-356 F g-1. According to the nitrogen-doped porous carbon material, the ginkgo leaves serve as a carbon source, so that the comprehensive utilization rate of ginkgo leaf resources can beimproved, products with high value added can be acquired, and good electrochemical properties can be achieved.

Description

technical field [0001] The invention relates to the technical field of porous materials, in particular to the preparation and application of a nitrogen-doped porous carbon material. Background technique [0002] Electrochemical supercapacitor is a new type of energy storage device between traditional capacitors and rechargeable batteries. Due to its outstanding advantages such as high specific power and long life, it has become a research hotspot in the field of electrochemical energy storage in recent years. Carbon material is a kind of electrode material of electric double layer capacitor. Due to its large specific surface area, stable physical and chemical properties, and low cost, it has attracted the attention of many researchers. Activated carbon, template carbon, carbon nanotubes, carbon aerogel, and ordered mesoporous carbon have all become electrode materials for supercapacitors, and by adjusting the specific surface area, conductivity, length and distribution of po...

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Problems solved by technology

[0005] Ginkgo biloba, as one of the most popular ornamental plants in our country, is widely planted in streets, parks and mountains, and thousands of tons of ginkgo leaves are produced every year. At present, the only use of ginkgo leaves is to extract certain substances as medicines, and a large amount of ginkgo leaves are It is wasteful to dispose of as natural waste

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