▎ 摘　　要

NOVELTY - Three-dimensional network graphene useful for lithium battery, is claimed. The properties of graphene includes bulk density of lithium battery three-dimensional network graphene is 0.002-0.05g/cm3, purity greater than 99.8% and specific surface area is 500-1500 m2/g. USE - The three-dimensional network graphene is useful for lithium battery (claimed). ADVANTAGE - The graphene is safe to, has high specific surface area, high electrical conductivity, high thermal conductivity and better electrolyte wettability, reduces internal resistance of battery, reduces heat generated during charging and discharging of battery and enhances the power and energy density. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing three-dimensional network graphene, comprising: (i) taking high-purity expanded graphite, anionic organic surface-active agent, dispersant, defoamer and mixed solvent, mixing in dissociation equipment to obtain viscous graphene slurry; (ii) mixing aspiration expansion polymer material with graphene slurry to obtain the complex slurry, coating the complex slurry on heat-resistant high-porosity foam material and carrying out vacuum adsorption of complex slurry through pores; and (iii) placing the step (ii) resultant at high temperature atmosphere of 800-1200 degrees C under inert gas protection, carrying out carbonization, cooling, placing the three-dimensional network adsorbed graphene powder porous foam in deionized water or deionized water and a mixture of ethanol, stirring, filtering and rapid drying.