▎ 摘　　要

NOVELTY - The method involves dispersing dried cut waste silica and graphene in a solvent in a certain mass ratio to form a first suspension and a second suspension, mixing the first suspension with the second suspension uniformly to obtain a third suspension, filtering the third suspension to obtain filter film with different sizes and thicknesses, drying the filter film, placing the film in a high-temperature furnace, performing pre-reduction to remove a partial functional group in the graphene, cooling to room temperature, taking out the sample, and performing electro-thermal shock treatment on the thin film to prepare a load-carrying silicon nano wire graphene film. USE - Method for quickly preparing silicon nano-wire used for lithium ion battery material cathode fast thermal shock method. Can also be used in nano-electronic device, optoelectronic device and new energy. ADVANTAGE - The method: utilizes the waste silicon material generated by photovoltaic industrial crystal silicon cutting process as silicon source, using short range, green, low energy consumption and high-efficiency technology to prepare high added value silicon nanowire for lithium ion battery cathode realizing resource utilization of solid waste; utilizes cutting waste silicon powder as silicon powder, replacing the traditional preparation of silicon nano-wire used for secondary processing of high cost, toxic silicon source; and provides high product purity. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a silicon nano-wire.