▎ 摘　　要

NOVELTY - Device comprises a nozzle. The nozzle comprises a feeding port, a discharge port and a connection pipe body between the feeding port and the discharge port. A through hole is connected to the material inlet of the pressurizer for pressurizing a graphite dispersion so that the port from the feed into the pipe body. The pipe body from the feeding opening to the discharge port has at least one internal diameter change and one formed on the space difference of the diameter change. USE - The device is useful for manufacturing large surface area graphene (claimed). DETAILED DESCRIPTION - Device comprises a nozzle. The nozzle comprises a feeding port, a discharge port and a connection pipe body between the feeding port and the discharge port. A through hole is connected to the material inlet of the pressurizer for pressurizing a graphite dispersion so that the port from the feed into the pipe body. The pipe body from the feeding opening to the discharge port has at least one internal diameter change and one formed on the space difference of the diameter change. The graphite of the graphite dispersion flowing through the pipe body is gradually reduced layer number at least 20 layers of large area graphene. The large-area graphene La with a diameter between 1-1000 mu m, where the La is value is obtained by Raman spectroscopy. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the device for manufacturing large surface area graphene.