Preparation and applications of nitrogen doped porous active carbon material

Abstract

The invention discloses a nitrogen doped porous active carbon material, which is prepared by burning a carbon precursor prepared from sago cycas, a nitrogen source, and an alkaline inorganic substance. The specific surface of the material is in a range of 1136 to 2628 m<2>/g, and the average aperture is in a range of 1.17 to 2.11 nm. The preparation method comprises the following steps: step one, washing the leaves of sago cycas by water, drying the leaves, grinding the leaves, and burning the leaves to obtain a carbon precursor; step two, mixing the carbon precursor, the nitrogen source, and the alkaline inorganic substance, soaking, drying, burning, and carrying out activation to obtain a nitrogen doped porous active carbon material; and step three, soaking the nitrogen doped porous active carbon material in an acid solution, washing, filtering, drying, and grinding to obtain the final nitrogen doped porous active carbon material. When the material is used as the electrode material of a super capacitor, and if the current density is 1 A g<-1>, the specific capacitance is in a range of 266 to 351 F g<-1>. Leaves of sago cycas are taken as the raw materials, the application range is enlarged; and the material has a wide application prospect in the fields of porous materials and super capacitor.

Description

technical field [0001] The invention relates to the field of preparation of biomass carbon materials, in particular to the preparation and application of a nitrogen-doped porous activated carbon material. Background technique [0002] Energy is the main driving force for the development of human society. Throughout the history of human development, every innovation in energy technology has caused major changes in social productivity and production relations, thus promoting the development of history. However, due to the high development of industrialization and the unrestrained exploitation of fossil fuels such as coal, oil, and natural gas, a series of problems such as resource shortage and environmental pollution have been caused, and the development and use of renewable energy have been paid more and more attention. Therefore, it is particularly important to take advantage of biodiversity and use biomass as a raw material for the development of energy materials. [0003...

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Problems solved by technology

This method realizes the collection and utilization of camphor leaves, avoids the pollution caused by incineration, and realizes the effective utilization of resources, but the prepared porous carbon material has a low specific surface area and low specific capacitance.

[0006] At present, there is no public technology for preparing nitrogen-doped porous activated carbon materials for supercapacitors using iron leaves as raw materials, urea as nitrogen source, and potassium hydroxide as activator.

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