▎ 摘　　要

NOVELTY - Preparing graphene on large scale by using high-solid-content filter cake involves preparing graphene oxide by a Hummers method, using filter cake obtained by filter pressing as a raw material, carrying out heat treatment at 500-1500degrees Celsius to obtain rough graphene powder, mixing rough graphene powder with water, and subjecting to filter pressing to obtain a cake. The cake is washed and subjected to filter pressing to obtain purified graphene filter cake, and purified graphene filter cake is dried to obtain graphene powder. USE - Method for preparing graphene by high solid content filter cake used in the advanced fields of organic electronics, such as super capacitor, solar battery, lithium battery and optoelectronic element. ADVANTAGE - The method is simple and easy to implement, greatly improves the preparation efficiency of the graphene, and is beneficial to large-scale industrial production of the graphene. The graphene oxide prepared by the method has good workability.