▎ 摘　　要

NOVELTY - Silicon-based composite material comprises silicon and/or silicon oxide as the core. The outer surface of the inner core is covered by a composite layer of carbon and fluorocarbon. The composite layer has a continuous dense structure, where the carbon content of the coating layer gradually decreases from the inside to the outside, and the carbon fluoride content gradually increases. USE - The material is useful as cathode material in lithium ion battery (claimed).