Method for preparing graphene-based composite material

Abstract

The invention provides a method for preparing a graphene-based composite material. The method includes the following steps: stirring and grinding carbon materials, such as graphite, graphene, graphene oxide, carbon fiber, and carbon nano tube with a composite material to obtain a composite turbid liquid; disposing the turbid liquid to a container in a high-intensity magnetic field for strong stirring or ultrasonic processing to obtain a graphene-based composite gel body material for performing filtering and thermal processing so as to obtain a graphene-based composite powder body. According to the invention, potential difference is generated when carbon materials and the composite material move under a magnetic environment, such that the composite material and the graphene are evenly scattered and composed, which is conducive to increasing the graphene-based composite material. According to the invention, the method has simple technologies and low cost; the prepared graphene-based composite material is advantaged by high conductivity, large specific surface area, excellent power characteristics, and high energy density, and is intended for applications in the fields of novel ultra-capacitive electrodes, and lithium battery cathodes materials.

Description

technical field [0001] The invention relates to the technical field of graphene materials and preparation, in particular to a method for preparing graphene-based composite materials. Background technique [0002] Graphene has received extensive attention since it was successfully prepared in the laboratory in 2004. Graphene is composed of hexagonally arranged sp 2 A two-dimensional sheet of carbon atoms with a thickness of one atom, which is the basic unit of graphite, has a theoretical specific surface area of ​​2630m 2 / g. It has been found that graphene has many properties that graphite does not have, such as room temperature quantum Hall effect, massless transport properties, optical properties, thermoelectric transport properties, light transmittance and extremely high Young's modulus. Because graphene has these characteristics, graphene and graphene-based materials have potential uses in many aspects and can be combined with various functional materials to further i...

AI Technical Summary

Problems solved by technology

A preparation process of graphene powder is disclosed in the prior art, which prepares graphene powder on a large scale through spray drying and subsequent heat treatment reduction. However, this patent mainly prepares graphene powder and does not utilize the excellent properties of graphene. Electrical conductivity and anti-corrosion properties, assembly of composite materials, and improvement of comprehensive performance of composite materials

Images