Method for preparing fluorine- and -nitrogen-doped graphene-like laminated material

Abstract

The invention discloses a method for preparing a fluorine- and-nitrogen-co-doped graphene-like laminated material, which is characterized in that glucosamine hydrochloride and polyvinylidene fluorideare mixed and evenly ball-milled in a salt template of a lithium chloride and potassium chloride mixed material; carbonization is performed under an argon atmosphere; acid washing and water washing are performed; and finally vacuum drying is performed to obtain the fluorine- and nitrogen-doped graphene-like laminated material. The fluorine- and -nitrogen co-doped graphene-like laminated material is obtained by one-step carbonization by means of the salt template method, wherein the graphene-like laminated layer is thin, fluorine and nitrogen elements are evenly distributed, the dimensional stability is good, and the repeatability is good. The content of thefluorine and nitrogen elements can be adjusted according to the adding amount of the polyvinylidene fluoride. The method is simple, canachieve one-step synthesis, and is moderate in carbonization temperature; the prepared fluorine- and-nitrogen-doped graphene-like laminated material has high mass specific capacity, good cycle stability and good electrical conductivity. The invention has good prospect in the application to supercapacitor energy storage materials.

Description

technical field [0001] The invention belongs to the field of preparation of modified non-noble metal co-doped carbon materials, in particular to a preparation method of a graphene-like sheet material co-doped with fluorine and nitrogen. Background technique [0002] With the rapid development of industry and the rapid increase of population, the consumption of global energy is accelerating at an alarming rate. Energy shortage and environmental pollution have become two major challenges facing human development. Therefore, it is necessary to vigorously develop low-cost, sustainable and environmentally friendly new energy conversion and storage devices to meet the development needs of modern society and alleviate increasingly prominent environmental problems. When it comes to sustainable and environmentally friendly materials, people first think of carbon materials. The source of carbon materials is very rich, inexhaustible, and chemical pollution is small. Since 2004, Novos...

AI Technical Summary

Problems solved by technology

The degree of graphitization of the carbon material produced in this way is not high, and it is difficult to create pores and control the specific surface area.

In addition, the finished graphene material is soaked in fluorine-nitrogen aqueous solution, and doped with nitrogen and fluorine elements through hydrothermal reaction. The finished graphene is mostly prepared by mechanical exfoliation, and it is difficult to achieve uniformity in size.

Images