▎ 摘　　要

NOVELTY - Manufacture of secondary battery cathode material involves preparing a silicon colloidal solution from waste silicon sludge suspension solution by separating silicon carbide particles and silicon particles and ultrasonically treating, preparing silicon agglomerates by drying the liquid droplet, preparing a mixed solution containing silicon agglomerates, graphene oxide and a dispersion medium, drying, heat-treating, obtaining silicone agglomerate-graphene composite. USE - Manufacture of secondary battery cathode material (claimed). DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for recovery of silicon particles.