▎ 摘　　要

NOVELTY - Method for preparing high-capacity and high-rate nano-silicon/siliconite anode composite materials for lithium battery anodes, involves crushing, screening, pickling, drying, and roasting of silicon solar cell waste or leftovers and silicon oxide tailings that are not up to standard in the material factory, silicon raw materials and silicon oxide raw materials are obtained. Mixing silicon raw materials and silicon oxide raw materials, adding dispersants and surfactants, and sanding to obtain nano silica/silicon oxide slurry. Adding acid to the nano silica/silicon oxide slurry, adjusting its pH to 4-6, adding certain proportion and type of coupling agent, and perform polymerization reaction to obtain a viscous gel slurry. Adding binder, conductive agent, and lithium source to the viscous gel-like slurry, then grinding, ultrasonically dispersing, drying, heat-sealing, and granulating to obtain a spherical precursor, and coating with carbon source and calcining. USE - High-capacity and high-rate nano-silicon/siliconite anode composite materials used for lithium battery anodes (Claimed). ADVANTAGE - Method for preparing high-capacity and high-rate nano-silicon/siliconite anode composite materials is beneficial to recycling resources, reduces the rigor degree of material reaction, and has the advantages of regular shape, small volume expansion effect, excellent conductivity, high coulombic efficiency, good conductivity and the like.