Recently, Prof. Yu Jie of the School of Materials Science and Engineering of HIT and his doctoral student Zeng Jie of the Research Group made significant progress in the growth of graphene materials. The research results were published in the “International Advanced Materials” (a famous international material journal). : 19.791). The paper is entitled 'Thermochemical Vapor Deposition of 3D Graphene Fiber'.
Graphene has many advantages because of its unique single-atom layer structure. It has attracted wide attention in recent years and has a great application prospect. However, graphene is prone to agglomeration when it is applied, and thus loses its origin. The superior properties of the monoatomic layer structure, the preparation of three-dimensional graphene with a three-dimensional network structure is an effective way to solve this problem.
The current three-dimensional graphene preparation technology has problems such as excessive pores, missing active edges, many defects, many impurities, poor conductivity, poor mechanical properties, etc. Physician Zeng Jie of the School of Materials Science and Engineering utilizes heat under the guidance of a tutor Yu Jie. Chemical vapor deposition (CVD) succeeded in realizing the vertical orientation growth of graphene sheets on the surface of electrospun nano-carbon fibers. A novel three-dimensional graphene continuous fiber material was obtained. The main structure and performance index of the graphene sheets were greatly improved compared to the existing three-dimensional graphene materials. This work firstly created a three-dimensional graphene continuous fiber material, which broke through the problem that thermal graphene could not grow vertical graphene, found a fast-growing catalytic pyrolysis method, and conducted large-scale block material growth demonstration, eliminating the need for The main obstacle for the large-scale application of vertical graphene is expected to rapidly realize large-scale production.
It is reported that the research group has successfully extended this technology to other vertical growth graphenes such as carbon fiber, oxide/carbide/nitride fiber, foamed carbon, carbon black, silicon particles, etc., which can be widely used for heat conduction/ Conductive / high-strength composite materials, flexible conductors, electromagnetic shielding, sound absorption, energy storage, catalysis, adsorption purification and other fields, showing great potential for application. The results have applied for Chinese invention patents and PCT patents.
