▎ 摘　　要

NOVELTY - Preparation of lithium ion negative electrode material using tin-graphene composite material comprises grinding tin, graphene, graphite and carbon black, performing graphitization at 2500-2800 degrees C for 192-240 hours, placing in dipping tank at 250-650 degrees C and 7-12 kPa for 8-15 hours, extruding, setting mold temperature at 180-220 degrees C, heating, extruding, carbonizing under nitrogen or argon gas at 120-370 degrees C for 100 hours, heating at 370-570 degrees C for 57 hours, heating at 570-870 degrees C for 75 hours, heating at 870-1200 degrees C for 110 hours, roasting for 24 hours, cooling, pressing for 2 hours, soaking, roasting under nitrogen or argon gas atmosphere, baking at 1200 degrees C for 48 hours, secondary baking for 450-550 hours, performing secondary graphitization at 2800-3200 degrees C for 450-500 hours, and purifying. USE - Method for preparing lithium ion negative electrode material using tin-graphene composite material.