▎ 摘　　要

NOVELTY - Preparing biomass-derived hard carbon/graphene sodium ion battery cathode material comprises dissolving the biomass to obtain biomass solution, uniformly mixing graphene oxide and biomass solution to obtain mixed solution, centrifuging, washing, freezing, drying, and calcining at high temperature. USE - The method is useful for preparing biomass-derived hard carbon/graphene sodium ion battery cathode material. ADVANTAGE - The cathode material of graphene does not have obvious agglomeration, has high specific capacity and good cycle performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for biomass-derived hard carbon/graphene sodium ion battery cathode material prepared by theabove method.