▎ 摘　　要

NOVELTY - Preparing graphene material involves calcining graphite oxide under nitrogen, adding a mixed solution of ethylene glycol and water, uniformly dispersing under ultrasonic and magnetic stirring. Mixed solution of sodium hydroxide and ethylene glycol is added to adjust the pH value to 10-12, microwave heated after sealing, cooled to room temperature with magnetic stirring, washed, filtered and dryied to obtain the graphene material. The calcination conditions are calcination at 350-450℃ for 3.5-4.5 hours. USE - Method for preparing graphene material for preparing of conductive antenna material for use in RFID electronic label (all claimed). ADVANTAGE - The method enables preparing graphene material with has high dispersion performance and stability, easy to disperse uniformly and stably stored in the solvent. The graphene sheet layer is clear, the conductive performance is excellent, and the graphene is substantially not affected after dispersing. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) a graphene material, which is prepared; (2) a graphene conductive paste, which is prepared from the graphene material; (3) a preparation method of the graphene conductive paste, which involves: (a) adding the graphene material to a solvent, ultrasonically, stirring, and uniformly dispersed to obtain the graphene conductive paste; the solvent is preferably at least one of N-methylpyrrolidone and dimethylformamide; (4) a radio frequency identification (RFID) antenna, which is made by printing the graphene conductive paste on an antenna substrate by a multi-layer ink direct writing technique; (5) a RFID electronic label, which has the RFID antenna.