Preparation method of graphene

A technology of graphene and graphite, which is applied in the field of new material synthesis, can solve the problems of low yield and high number of graphene layers, and achieve the effects of high yield, strong conductivity and simple equipment
CN103663428AInactive Publication Date: 2014-03-26OCEANS KING LIGHTING SCI&TECH CO LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
OCEANS KING LIGHTING SCI&TECH CO LTD
Publication Date
2014-03-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a preparation method of graphene, which comprises the following steps: (1) mixing graphite and an ionic liquid in a mass ratio of 1:(0.5-5), and carrying out ultrasonic dispersion for 10-48 hours to obtain intercalation graphite of which the intercalation compound is the ionic liquid, wherein the ionic liquid is an imidazole ionic liquid or pyrrolidine ionic liquid; and (2) putting the intercalation graphite in a reactor in an inert gas protective atmosphere, heating to 700-900 DEG C, keeping for 0.5-1 hour, cooling to room temperature in the inert gas protective atmosphere, and collecting the solid product which is the graphene. The method has the advantages of simple equipment and simple and feasible operation, and can easily implement large-scale industrial production; the prepared graphene has the characteristics of high yield, smaller number of layers, favorable mechanical properties and high conductivity; and compared with the common graphene prepared by a redox process, the graphene prepared by the method provided by the invention has the advantages of fewer defects, complete crystal structure and the like.
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Description

technical field

[0001] The invention relates to the field of new material synthesis, in particular to a method for preparing graphene. Background technique

[0002] Graphene is a two-dimensional carbon atom crystal discovered by Andre K. Geim of the University of Manchester in 2004. Due to its unique structure and photoelectric properties, it has become a research hotspot in the fields of carbon materials, nanotechnology, condensed matter physics and functional materials, attracting many scientific and technological workers. Single-layer graphene has excellent electrical and thermal conductivity and low thermal expansion coefficient, and its theoretical specific surface area is as high as 2630m 2 / g (A Peigney, Ch Laurent, et al. Carbon, 2001, 39, 507), can be used in effect transistors, electrode materials, composite materials, liquid crystal display materials, sensors, etc. At present, the methods for preparing graphene mainly include mechanical exfoliation, epitaxial gr...

Claims

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