Nitrogen-doped carbon/nickel/nickel oxide nanocomposite preparation method

Abstract

The invention belongs to the technical field of energy storage materials, relates to a nitrogen-doped carbon / nickel / nickel oxide nanocomposite preparation method, is used for supercapacitor electrodematerial preparation occasions, and solves the problem that a traditional technology has many preparation steps and costs long time and low compound specific capacitance is not conducive to material application. A crosslinked polyacrylamide of a 3D structure / nickel salt aerogel are used as a precursor and a self-template, through calcination treatment, in-situ nitrogen doping and catalytic graphitization of the carbon material are realized and a three-dimensional hierarchical porous structure is formed, nickel nanoparticles are uniformly distributed in a carbon matrix, a metal elementary substance surface layer is oxidized to nickel oxide, a ternary composite material is formed, the preparation technology is simple in steps, is energy-saving and environment-friendly, the principle is reliable, a product has the high specific surface area of the carbon material, high conductivity of metallic nickel, typical pseudocapacitance characteristics of nitrogen-doped carbon and nickel oxide, andthe composite material has excellent electrochemical performance, is environment-friendly in use, and thus has good economic benefits and broad market prospects.

Description

Technical field: [0001] The invention belongs to the technical field of energy storage materials, and relates to a method for preparing a nitrogen-doped carbon / nickel / nickel oxide nanocomposite material (NPGC / Ni / NiO). The product can be used in the preparation of supercapacitor electrode materials. Background technique: [0002] Supercapacitors have the advantages of high power density, fast charge and discharge, long cycle life, high efficiency, cleanliness, and safety. According to the energy storage mechanism, supercapacitors can be divided into electric double layer capacitors and Faraday pseudocapacitors. Electric double layer capacitors use the interface electric double layer between the electrode and the electrolyte to store energy, and what happens is a physical adsorption process. It usually uses activated carbon, graphene, etc. with a high specific surface area as the electrode material. The Faraday pseudocapacitor generates a higher specific capacity through rapi...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the shortcomings of the existing synthesis technology, to propose a three-dimensional hierarchical porous structure nitrogen-doped partially graphitized carbon / nickel / nickel oxide nanocomposite preparation method, to solve the problem of many preparation steps, long time consumption, and complex Low specific capacitance is not conducive to the application of materials, and it can be easily and efficiently prepared supercapacitor composite electrode materials

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