▎ 摘　　要

NOVELTY - Large-scale production of millimeter-scale graphene ball comprises adding graphite oxide in deionized water, ultrasonically dispersing, and controlling dispersion to adjust concentration of liquid; slowly adding into liquid nitrogen to freeze spherical graphene oxide ice particles; freeze-drying to obtain millimeter-scale graphene oxide; and adding to container containing hydrazine and heating to 75-110 degrees C for 5-48 hours. USE - Method for large-scale producing millimeter-scale graphene ball (claimed). ADVANTAGE - The method maintains original drop shape and millimeter size, has good absorption and mechanical performance and low cost, and is efficient and simple.