▎ 摘　　要

NOVELTY - A self supported three-dimensional porous graphene composite microsphere is prepared by taking graphite oxide and surfactant, adding anhydrous ethanol, carrying out ultrasonic treatment at 30-60 degrees C for 30-240 minutes, filtering, drying, carrying out microwave heat treatment, adding deionized water, mixing, adding activator and binder, spray drying, granulating, adding kerosene and petroleum asphalt, stirring, drying, and carrying out microwave heat treatment. USE - Method for preparing self supported three-dimensional porous graphene composite microsphere (claimed). ADVANTAGE - The material has high structural stability, void content and bulk density. It is suitable for sodium ion battery with high capacity, high-current discharge performance and good circulation performance and excellent fill density.