▎ 摘　　要

NOVELTY - Preparing composite silicon-carbon negative electrode material involves taking total powder mass, which is specified as the sum of the required mass of suspending agent, nano-silicon powder and graphene, weighing suspending agent with specific to 35-50 wt.% based on total powder mass, dissolving suspending agent in the dispersant to form a glue solution by mechanical stirring, weighing the nano-silica powder with specific to 45-60 wt.% based on total powder mass, adding to the glue solution, mixing by mechanical stirring to form a first mixed solution, and taking by weighing graphene with specific to 1-5 wt.% based on total powder mass. USE - Method for preparing composite silicon-carbon negative electrode material for use in lithium-ion battery. ADVANTAGE - The method has simple process, good cycle performance of the preparation material and easy realization of industrialized production. DETAILED DESCRIPTION - Preparing composite silicon-carbon negative electrode material involves taking total powder mass, which is specified as the sum of the required mass of suspending agent, nano-silicon powder and graphene, weighing suspending agent with specific to 35-50 wt.% based on total powder mass, dissolving suspending agent in the dispersant to form a glue solution by mechanical stirring, weighing the nano-silica powder with specific to 45-60 wt.% based on total powder mass, adding to the glue solution, mixing by mechanical stirring to form a first mixed solution, taking by weighing graphene with specific to 1-5 wt.% based on total powder mass, dissolving in the first mixed solution to obtain the second mixed solution, injecting second mixed solution into the grinding machine, grinding, driving the ground second mixed solution into a spray dryer for spray granulation to obtain a silicon carbon material precursor, heating gradually silicon carbon material precursor to 800-1000℃ under the protective gas, performing constant temperature calcination to obtain silicon carbon negative electrode material for a lithium-ion battery after the calcination is completed.