Manufacturing method for porous composite material of anode of lithium-ion battery in which graphene oxide is dispersed in water to make a dispersion liquid

A manufacturing method for a porous composite material of an anode of a lithium-ion battery comprises: (a) dispersing graphene oxide in water and having it separated to a thickness range below 15nm in order to obtain a first dispersion liquid; (b) grinding and dispersing the first dispersion liquid to obtain a second dispersion liquid; (c) mixing the second dispersion liquid and an aqueous solution including silicon nanoparticles and a cationic surfactant to carry out self-assembly in order to obtain a first mixture liquid; (d) sequentially mixing the first mixture liquid with a carbon-containing precursor and carbon-containing nanospheres to obtain a second mixture liquid; (e) subjecting the second mixture liquid to spray drying in order to obtain the composite microspheres; and (f) sintering the composite microspheres. The porous composite material manufactured with the manufacturing method helps provide the lithium-ion battery with a high specific discharge capacity, a relatively high capacity retention ra