A kind of preparation method of high conductivity graphene

Abstract

The invention discloses a preparation method of high-electroconductivity graphene, belonging to the field of nano graphite electroconductive materials. The method comprises the following steps: dispersing low-oxidation-degree graphite oxide in a solvent containing aromatic alcohol to obtain a low-oxidation-degree graphene oxide dispersion solution, and carrying out solvothermal reduction on the dispersion solution to obtain the high-electroconductivity graphene, wherein the mol ratio of oxygen to carbon in the low-oxidation-degree graphene oxide is lower than 1:2, and the low-oxidation-degree graphene oxide does not have any characteristic diffraction peak in an X-ray diffraction pattern. The preparation method disclosed by the invention has the characteristics of high speed, high efficiency and no toxicity. The graphene disclosed by the invention has high electroconductivity, and is applicable to the fields of battery materials, energy storage materials, electronic devices, electroconductive / thermoconductive materials, electromagnetic shielding materials, antistatic materials and the like.

Description

technical field [0001] The invention belongs to the field of nano-conductive materials, and in particular relates to a preparation method of high-conductivity graphene. Background technique [0002] Graphene is a new type of carbon nanomaterial. Since its discovery in 2004, graphene has attracted much attention due to its excellent electrical, thermal, optical and mechanical properties, as well as a wide range of application prospects. Among the many preparation methods of graphene, the method of preparing graphene by reducing graphene oxide (that is, the redox method) has become one of the most important methods for preparing large-scale and low-cost graphene, which is very important for promoting the development of graphene. Industrialization is of great significance. [0003] At present, the main research of the redox method is focused on how to efficiently remove the oxygen-containing groups (such as carboxyl, carbonyl, epoxy and hydroxyl groups) on the surface of grap...

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Problems solved by technology

However, because some of the obtained graphite oxide sheets are not oxidized and the peeling is insufficient, only nano-graphite sheets can be obtained after being reduced (X-ray diffraction detects the diffraction peak of graphite itself near 26°), and the use of hydrazine hydrate vapor Or the use of high temperature is undoubtedly not conducive to industrialization

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