▎ 摘　　要

NOVELTY - A nano-scaled graphene plate material is produced by, partially or fully carbonizing a precursor polymer or heat-treating petroleum or coal tar pitch to produce a polymeric carbon containing micron- and/or nanometer-scaled graphite crystallites with each crystallite comprising sheet(s) of graphite plane; exfoliating the graphite crystallites in the polymeric carbon; and subjecting the polymeric carbon containing exfoliated graphite crystallites to a mechanical attrition treatment to produce the nano-scaled graphene plate material. USE - For producing nano-scaled graphene plate for making carbon nano-tubes useful in field emission devices; and as hydrogen fuel storage, rechargeable battery electrodes, coating ingredients, solid lubricant, fillers for a resin, and composite reinforcements. ADVANTAGE - The inventive method is a highly cost-effective way of producing large quantities of nano-scaled graphene plates. DETAILED DESCRIPTION - Production of a nano-scaled graphene plate material comprises: (1) partially or fully carbonizing a precursor polymer or heat-treating petroleum or coal tar pitch to produce a polymeric carbon containing micron- and/or nanometer-scaled graphite crystallites with each crystallite comprising sheet(s) of graphite plane; (2) exfoliating the graphite crystallites in the polymeric carbon; and (3) subjecting the polymeric carbon containing exfoliated graphite crystallites to a mechanical attrition treatment to produce the nano-scaled graphene plate material. DESCRIPTION OF DRAWING(S) - The figure conceptually illustrates the configuration difference between a carbon nano-tube and a nano-scaled graphene plate.