SILICON-CARBON COMPOSITE MATERIAL AND PREPARATION METHOD THEREFOR, SECONDARY BATTERY, AND ELECTRIC DEVICE

Provided are a silicon-carbon composite material and a preparation method therefor, a secondary battery, and an electric device. The silicon-carbon composite material includes a core and a coating coated on the surface of the core, the core includes a carbon matrix and a silicon-based material located on the surface of the carbon matrix; the silicon-based material includes a silicon cluster and a silicon carbide cluster, the silicon carbide cluster forms a network structure, and the silicon cluster is located in a gap of the network structure. The silicon-carbon composite material can eliminate the memory effect of silicon and improve the capacity retention rate.