▎ 摘　　要

NOVELTY - A method for preparing a porous composite material for the anode of a lithium ion battery, comprising: (a) dispersing graphene oxide in water and exfoliating it to a thickness of less than 15 nm to obtain a first dispersion; b) grinding and dispersing the first dispersion liquid to obtain a second dispersion liquid; (c) mixing the second dispersion liquid with an aqueous solution including silicon-containing nanoparticles and a cationic surfactant for self-assembly to obtain A first mixed liquid; (d) the first mixed liquid is sequentially mixed with a carbon-containing precursor and carbon-containing nanospheres to obtain a second mixed liquid; (e) the second mixed liquid is spray-dried To obtain composite microspheres; and (f) sintering the composite microspheres. The porous composite material prepared by the preparation method helps to provide the lithium ion battery with high gram capacity, high capacity maintenance rate and high charge and discharge stability.