A simple and rapid high-temperature quenching method for preparing highly conductive thin-layered graphene
A high conductivity and graphene technology, which is applied in the preparation of graphene materials and the field of rapid preparation of thin layered graphene with high conductivity, can solve the problems of unfavorable conductivity of graphene, achieve wide application value, less equipment investment, low cost effect
Active Publication Date: 2018-03-09
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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Problems solved by technology
[0003] Studies have shown that the surface of single-layer graphene is prone to agglomeration between sheets due to the extremely large Gibbs energy, and the more agglomerated layers, the more unfavorable it is to the conductivity of graphene.
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Embodiment 1
[0021] Commercially available graphene was used as raw material, pulverized by a traditional Chinese medicine pulverizer, and dried in an oven at 80°C for 1 h. Preheat the muffle furnace to 600 °C. 5g of the above-mentioned graphene was carefully put into a preheated furnace body and reacted at high temperature for 5 minutes. The high-temperature graphene was taken out and quickly transferred to a wide-mouthed container with about 200 mL of liquid nitrogen for quenching. Under the condition of normal temperature and pressure, the liquid nitrogen is boiled and volatilized completely, and the thin-layered graphene is collected.
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Abstract
The invention discloses a high-temperature quenching method for simple and rapid preparation of high-conductivity thin-layered graphene. The method comprises steps: 1) placing a certain amount of graphene in a high-temperature furnace body at 300-750°C for calcination for 1-20 minutes and then taking it out quickly; 2) quickly transferring the high-temperature graphene to a sufficient amount of refrigerant for quenching ; 3) Under normal temperature and pressure conditions, the refrigerant is boiled and volatilized, and the thin-layered graphene is collected. Compared with untreated graphene, the resulting graphene has a higher degree of thinning and greatly improved electrical conductivity. The process condition of the invention is easy to realize, the equipment investment is small, the operation is simple, and the cost is low.
Description
technical field [0001] The invention relates to a preparation method of a graphene material, in particular to a method for rapidly preparing thin-layered graphene with high conductivity, and belongs to the field of new inorganic energy materials. Background technique [0002] As the thinnest and strongest material in the known universe, graphene has attracted the attention of scientists all over the world due to its unique two-dimensional structure. As a charge carrier, it exhibits huge internal mobility and zero effective mass. It can maintain a current density six orders of magnitude higher than that of copper. The speed of conduction in a conductor. These excellent conductive properties make it have great application prospects in the fields of electronics and new materials. [0003] Studies have shown that the surface of single-layer graphene is prone to agglomeration between sheets due to the extremely large Gibbs energy, and the more agglomerated layers are, the more ...
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IPC IPC(8): C01B32/19
Inventor 蔡澎黄晓梅杨传俊廖艳艳
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI