▎ 摘　　要

NOVELTY - Method for preparing a carbon-silicon three-dimensional structure composite material, involves (a) dissolving 0.004-0.006 g graphene quantum dot in 4-6 ml ultrapure water, dripping in 0.65-0.85 ml 0.2-0.3 mol/ml copper(II) chloride or zinc chloride solution, and shaking to obtain a mixed emulsifier, (b) mixing the mixed emulsifier with 10-20 ml 10-20 mg/ml graphite oxide aqueous solution and 10-20 ml cyclohexane solution containing 0.1-0.2 g nano-silicon spheres and homogenizing for 20-30 seconds to obtain a uniform oil-in-water type emulsion, (c) adding 0.9-1.2 g hydrazine hydrate to the emulsion for reduction, and hydrothermally reacting to obtain a reduced emulsion and (d) freeze-drying the reduced emulsion, washing with a washing solution and drying in vacuum to obtain the product. USE - The method is useful for preparing a carbon-silicon three-dimensional structure composite material (claimed). ADVANTAGE - The method solves problems of volume expansion of silicon material and cracking and collapse of electrode material structure.