Graphene composite material and preparation method thereof

Abstract

The invention relates to a graphene composite material and a preparation method thereof. The graphene composite material provided by the invention is characterized in that a graphene material plate fixed on a metallic matrix serves as a carrier, and the elementary substance and/or a compound are compounded on the graphene surface. Meanwhile, the invention also discloses a method for preparing the graphene composite material. The graphene composite material prepared by the invention is opened between graphene sheets and is compounded with a chemical substance under the condition that a space body structure is formed, and the obtained material has high conductivity, high specific surface area and excellent performance of low electrical resistivity between the sheets, and can be widely applied to the fields of energy storage materials such as lithium ion batteries, super-capacitors, super lead carbon batteries, super nickel-carbon electrodes, solar energy and fuel cells, the field of heat dissipation materials, the field of environment-friendly adsorbing materials, the field of sea water desalination materials, the field of photoelectric sensor materials, the biological relevance field, the field of catalyst materials and the fields of conductive ink and coating materials.

Description

technical field [0001] The invention relates to the technical field of graphene application, in particular to a graphene composite material and a preparation method thereof. Background technique [0002] Before the discovery of graphene, it was thought that single atomic layer materials were thermodynamically unstable. In fact, graphene, a single atomic layer material, is not only stable but also has excellent mechanical and electrical properties (carrier mobility at room temperature reaches 2.5×10 5 cm 2 ·V -1 ·S -1 , thermal conductivity up to 5300W·m -1 ·K -1 , the theoretical specific surface area is as high as 2630m 2 g -1 , the resistivity is only about 10 -8 Ω·m), large specific surface area and high electrical conductivity make graphene a material with great application prospects. [0003] At present, researchers at home and abroad have done more research on the compounding and modification of graphene materials. For example, Science (2011, 332(6037): 1537-1...

AI Technical Summary

Problems solved by technology

[0004] In summary, although graphene and its composite materials and technologies have been applied to many fields, and performance improvements have been obtained, graphene with a high specific surface area has high surface activity due to high surface activity, intermolecular forces and chemical bonds. Strong and necessarily prone to reunion

Therefore, when preparing graphene composite materials, the specific surface area is significantly reduced due to stacking and agglomeration, and the performance advantages of high specific surface area, high electrical conductivity and high thermal conductivity of graphene materials cannot be fully utilized. Applications in a wider range and wider field

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