Abstract:
An improved method for preparing a carbon composite by coating the activated silicon precursor on surfaces of graphite-based or coke-based carbon particles by a plasma spray coating method after activating a silicon precursor by plasma is provided. A preparation method of a carbon composite comprises the processes of: injecting an inert gas and graphite-based or coke-based carbon particles into a reactor on which a rotor is mounted, thereby suspending the carbon particles by a rotary power of the rotor mounted on the reactor; and activating a silicon precursor by plasma, and injecting the activated silicon precursor into the reactor, thereby forming a nano-sized coating layer with a cluster shape on surfaces of the carbon particles. Further, the preparation method comprises a process or spraying the activated silicon precursor by a plasma spray coating method after activating a silicon precursor by plasma. The silicon precursor is a mixture of one or more selected from SiH4, SiH2Cl2, SiH3Cl, SiCl4, Si2Cl6, and Si(OC2H5)4.