Method for preparing bean dregs-based nitrogen-boron co-doped porous carbon material

Abstract

The invention provides a method for preparing a bean dregs-based nitrogen-boron co-doped porous carbon material. The method is a one-step impregnation carbonization activation method, and comprises the following steps: (1) pretreating bean dregs: boiling, fermenting, then adding a catalyst into the fermented bean dregs for catalysis, washing and then freeze-drying; (2) adding deionized water intothe pretreated bean dregs, adding an activator and a boron source, stirring and mixing, transferring into a culture dish, and putting into a drying oven for drying; (3) heat-treating the bean dregs treated in the step (2), soaking in an HCl solution after cooling, washing, and finally drying by microwave to obtain treated bean dregs; and (4) adding a binder and a pore forming agent into the treated bean dregs in the step (3), and mixing to form a bean dregs-based porous carbon material. According to the invention, the one-step impregnation carbonization activation method is adopted; and compared with the prior art, the one-step impregnation carbonization activation method has the advantages of simple method, low energy consumption and the like.

Description

technical field [0001] The invention relates to the technical field of material science, in particular to a method for preparing a bean dregs-based nitrogen-boron co-doped porous carbon material. Background technique [0002] Driven by rapid industrial development and increasing world population, energy shortage and environmental pollution have become two major problems hindering human development. Therefore, the development of efficient, stable, green and sustainable new energy conversion and storage devices can not only meet the needs of rapid social development but also alleviate the increasingly serious environmental problems. At present, among various energy storage devices, electrochemical energy storage devices are research hotspots, including lithium-ion batteries, nickel-metal hydride batteries, and supercapacitors. Supercapacitors have attracted worldwide attention because of their advantages such as fast charging speed, high safety, and no pollution. [0003] At...

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Problems solved by technology

[0005] In order to overcome the problems in the prior art that the preparation process of carbon materials for preparing electrodes is complicated and expensive, the present invention provides a method for preparing soybean dregs-based nitrogen-boron co-doped porous carbon material electrodes

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