▎ 摘　　要

NOVELTY - Producing multiple individual hollow graphene balls directly from a graphitic material, comprises: (a) mixing multiple particles of a graphitic material and multiple particles of a solid polymer carrier material to form a mixture in an impacting chamber of an energy impacting apparatus; (b) operating the energy impacting apparatus with a frequency and an intensity for a length of time for peeling off graphene sheets from the graphitic material and transferring the graphene sheets to surfaces of the solid polymer carrier material particles to produce graphene-encapsulated polymer particles inside the impacting chamber; (c) recovering the graphene-encapsulated polymer particles from the impacting chamber; and (d) suspending the graphene-encapsulated polymer particles in a gaseous medium to keep the particles separated from each other while concurrently pyrolyzing the particles to thermally convert the polymer into pores and carbon. USE - The method is useful for producing multiple individual hollow graphene balls directly from a graphitic material. ADVANTAGE - The method is cost-effective. DETAILED DESCRIPTION - Producing multiple individual hollow graphene balls directly from a graphitic material, comprises: (a) mixing multiple particles of a graphitic material and multiple particles of a solid polymer carrier material to form a mixture in an impacting chamber of an energy impacting apparatus; (b) operating the energy impacting apparatus with a frequency and an intensity for a length of time for peeling off graphene sheets from the graphitic material and transferring the graphene sheets to surfaces of the solid polymer carrier material particles to produce graphene-encapsulated polymer particles inside the impacting chamber; (c) recovering the graphene-encapsulated polymer particles from the impacting chamber; and (d) suspending the graphene-encapsulated polymer particles in a gaseous medium to keep the particles separated from each other while concurrently pyrolyzing the particles to thermally convert the polymer into pores and carbon, where at least one of the graphene balls comprises a hollow core enclosed by a shell composed of graphene sheets bonded together by the carbon.