Method for preparing metallic cladding expansion graphite

Abstract

The invention provides a method for preparing metallic cladding expansion graphite by means of liquid phase technology. The method includes the steps: synthesizing raw graphite into expansion graphite; uniformly mixing anhydrous metal salt with liquid aprotic organic matters at the temperature of 20-100 DEG C to obtain anhydrous metal salt organic suspending liquid; uniformly stirring the expansion graphite with the anhydrous metal salt organic suspending liquid prior to standing for 0-4h; preserving heat for 12-48h at the temperature of 400-700 DEG C in an air isolating manner; and cooling the expansion graphite to obtain the metallic cladding expansion graphite. By the aid of the method, high embedding quantity of metallic elements can be ensured, so that the relative content of metallics in the metallic cladding expansion graphite can be precisely controlled. Compared with a traditional method for preparing metallic cladding expansion graphite by means of solid phase technology, the method is higher in operability, environment-friendly and low in energy consumption.

Description

Technical field [0001] The invention relates to a preparation method of graphite material, in particular to a preparation method of metal intercalation expanded graphite. Background technique [0002] Metal elements such as Fe, Co, and Ni are commonly used catalysts for preparing carbon nanotubes by vapor phase chemical deposition. The requirements are that the metal particles cannot be oxidized and the particle size should be small enough. However, nano-scale metal particles have high activity and are easy to Oxidized by air, it is not conducive to storage. Inserting these metal catalysts between the graphite layers can not only ensure the nanometer size of the metal particles, but also is not easy to oxidize and deteriorate. [0003] In the traditional process, the anhydrous chloride-graphite intercalation compound of Fe, Co, Ni and other metals can be prepared by solid phase method, and then the graphite intercalation compound of Fe, Co, Ni and other metals can be prepared by d...

AI Technical Summary

Problems solved by technology

[0003] In the traditional process, anhydrous chloride-graphite intercalation compounds of Fe, Co, Ni and other metals can be prepared by solid phase method, and then decomposed to prepare graphite intercalation compounds of Fe, Co, Ni and other metals. However, using This method will produce highly toxic chlorine gas, and the energy consumption is high, the heat treatment atmosphere is harsh, and the reaction cycle is long. More importantly, during the volatilization process of chlorine gas, metal elements will also come out of the graphite interlayer with it, resulting in the loss of metal elements. The amount of intercalation is difficult to control