Method for directly preparing co-doping three-dimensional graphene electrode material through biomass carbon sources

Abstract

The invention discloses a method for directly preparing a co-doping three-dimensional graphene electrode material through biomass carbon sources. The method mainly includes the steps that biomass such as eggshells of artemia cysts, bean pulp and shrimp shells are used as the carbon sources, red phosphorus or boric acid is added to serve as a stripping agent, metal nickel salt is added to serve as a catalyst, and oxygen-nitrogen-phosphor multi-atom co-doping three-dimensional porous graphene is synthesized in a roasted mode at the temperature of 700 DEG C to 900 DEG C under argon atmosphere; the obtained graphene is ground into powder, the graphene, acetylene black and PTFE are ultrasonically dispersed into absolute ethyl alcohol in the mass ratio of 85:10:5, the mixture is dried at the temperature of 80 DEG C to be pasty, 0.5 mg to 5 mg of the mixture is taken and evenly smeared on 1*1-cm foam nickel, vacuum drying is carried out at the temperature of 120 DEG C for 12 h, plate pressing is carried out at the pressure of 12 MPa, and an electrode plate is obtained. According to the method, the source of the required raw materials is wide, the price is low, devices are simple, repeatability is good, and low-cost large-scale industrial production can be achieved easily; the prepared graphene electrode material has the advantages of being good in electrochemical activity, large in specific area, not prone to repeated accumulation and the like; the broad application prospects are achieved in the aspects such as electrode materials and catalyst carriers of supercapacitors and lithium ion batteries.

Description

technical field [0001] The invention belongs to the technical field of electrode materials, in particular to a preparation method of graphene electrode materials. technical background [0002] Graphene is a carbon atom with sp 2 The hybridized orbitals form a hexagonal planar film with a honeycomb lattice, a two-dimensional material with a thickness of only one carbon atom. The special structure of graphene makes it exhibit excellent properties, such as high strength, high electron mobility, high thermal conductivity, high specific surface area, high chemical and electrochemical stability, and can be applied to composite materials, semiconductor materials, storage Energy materials, catalysts and catalyst supports and other fields. It is an effective way to change the electronic structure and chemical properties of graphene through effective doping. The incorporation of heteroatoms into the lattice of graphene can not only effectively introduce a band gap, but also increase...

AI Technical Summary

Problems solved by technology

However, the preparation method of the prior art makes the preparation process relatively complicated, the production cost is expensive, and the equipment requirements are high, and the preparation of the prepared graphene is difficult to control, and cannot be produced on a large scale, which greatly limits the application of graphene.

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