▎ 摘　　要

NOVELTY - Porous silicon negative electrode material comprises a porous silicon compound, conductive carbon and a composite material, where the portion of the surface of the porous silicon compound is coated with conductive carbon, portion of the porous silicon compound surface or portion of the conductive carbon surface, or portion of both, is coated with a composite material. USE - Porous silicon negative electrode material. ADVANTAGE - The porous silicon negative electrode material ensures the high capacity of the negative electrode material, improves the conductivity of the silicon negative electrode material and stable structure and migration rate of lithium ion.