A multilayer graphite material, its preparation method and application

Abstract

This invention relates to the field of graphite materials technology, specifically disclosing an expanded graphite material, its preparation method, and its application. The preparation method includes the following steps: mixing an expanding agent with artificial graphite, followed by heat treatment to obtain graphite impregnated with the expanding agent; the expanding agent is an aluminum chloride or an aluminum oxide chloride, with the chemical formula AAl. 1‑x B x Cl 3‑3x+nx‑y O y Wherein: A is Li or Na, and B is at least one of Fe, Zn, Si, and Sn; the graphite impregnated with the spreading agent is immersed in ammonia water, stirred for hydrolysis, filtered, dried, and heat-treated to obtain the spread graphite material. This invention utilizes the low-temperature melting and thermal diffusion of the spreading agent to spread graphite layers. The spreading method is simple, has low energy consumption, and is suitable for large-scale applications. The low-temperature melting method allows for adjustable interlayer spacing, and the degree of graphite spreading can be adjusted by changing the heat treatment time and temperature.

Images