Carbon composite silicon anode material and method

The present invention provides a silicon-carbon composite negative electrode material, silicon-carbon composite negative electrode material a particle size of 1 to 200 m, and a core-shell structure comprising a support base, a porous carbon support base material obtained by the decomposition of raw materials; also provides a silicon preparation of negative electrode carbon composite material, the following steps: a, by physical or chemical activation of activated biomass material way reaming prepared porous carbon, or making a small molecule organic material hydrolytically using a porous carbon precursor; Second, the silicon particles and porous carbon or a porous carbon obtained in the mixed precursor solution and sonicated; Third, the solution mixture was evaporated to dryness to give a solid powder; Fourth, the solid powder was dried, heat-treated, pulverized, sieved silicon-carbon composite negative electrode material obtained. The present process is simple, short flow, easy to operate, low cost, using a silicon-carbon composite negative electrode material of the present invention provides the lithium ion battery prepared for a variety of mobile electronic device or a mobile device driven energy.