▎ 摘　　要

NOVELTY - Producing a nano graphene platelet (NGP) material, comprises: (i) subjecting a graphitic material to a supercritical fluid at a first temperature and a first pressure for a first period of time in a pressure vessel and then (ii) rapidly depressurizing the fluid at a fluid release rate sufficient for effecting exfoliation of the graphitic material to obtain the NGP material. USE - The NGP material is useful as a conductive additive in transparent electrodes for solar cells or flat panel displays (e.g. to replace expensive indium-tin oxide), battery and supercapacitor electrodes, and nanocomposite for electromagnetic wave interference shielding and static charge dissipation. ADVANTAGE - The NGP material has good electrical conductivity. The process provides: NGP material without involving the use of any undesirable chemical; and ultra-thin NGPs. The process is rapid and ecofriendly.