▎ 摘　　要

NOVELTY - Preparing a silicon-carbon composite electrode material, involves pretreating the substrate is with a pretreatment solution to obtain a conductive substrate with charges on the surface, the conductive polymer is electrostatically adsorbed on the surface of the silicon material to prepare silicon/conductive polymer powder; mixing silicon material and carbon material to prepare silicon/carbon composite powder; dispersing the silicon/conductive polymer powder and the silicon/carbon composite powder into polyelectrolyte and/or inorganic salt solutions with opposite electrical properties, respectively, to obtain silicon/conductive polymer slurry and silicon/carbon slurry; alternately depositing the silicon/conductive polymer paste and the silicon/carbon paste on the surface of the conductive substrate opposite to the electrical properties. USE - Method for preparing a silicon-carbon composite electrode material. DETAILED DESCRIPTION - Preparing a silicon-carbon composite electrode material, involves pretreating the substrate is with a pretreatment solution to obtain a conductive substrate with charges on the surface, the conductive polymer is electrostatically adsorbed on the surface of the silicon material to prepare silicon/conductive polymer powder; mixing silicon material and carbon material to prepare silicon/carbon composite powder; dispersing the silicon/conductive polymer powder and the silicon/carbon composite powder into polyelectrolyte and/or inorganic salt solutions with opposite electrical properties, respectively, to obtain silicon/conductive polymer slurry and silicon/carbon slurry; alternately depositing the silicon/conductive polymer paste and the silicon/carbon paste on the surface of the conductive substrate opposite to the electrical properties, and drying to obtain a silicon-based composite film, the silicon-based composite film is sintered at high temperature under the protection of an inert atmosphere to obtain a silicon-carbon composite electrode material.