▎ 摘　　要

NOVELTY - Production of graphene involves stirring liquid polyacrylonitrile oligomer (LPAN) solution at 80-300 degrees C for 8-72 hours, stirring obtained micro-cyclized LPAN solution at 200-300 degrees C for 1-10 hours, grinding obtained thermally oxidized polyacrylonitrile oligomer, sieving, drying resultant material at room temperature, calcining obtained thermal oxide precursor at 400-1000 degrees C for 1-24 hours, and calcining obtained low-temperature carbonization precursor at 1000-3000 degrees C for 1-10 hours. USE - Production of graphene (claimed). ADVANTAGE - The method enables production of graphene with high electroconductivity, by simple process. DETAILED DESCRIPTION - Production of graphene involves stirring liquid polyacrylonitrile oligomer (LPAN) solution at 80-300 degrees C for 8-72 hours, stirring obtained micro-cyclized LPAN solution at 200-300 degrees C for 1-10 hours, obtaining thermally oxidized polyacrylonitrile oligomer having trapezoidal structure, grinding thermally oxidized polyacrylonitrile oligomer, sieving, drying resultant material at room temperature, calcining obtained thermal oxide precursor at 400-1000 degrees C and gas flow rate of 10-500 ml/minute for 1-24 hours under inert gas protection atmosphere, and calcining obtained low-temperature carbonization precursor at 1000-3000 degrees C and gas flow rate of 10-500 ml/minute for 1-10 hours under inert gas protection atmosphere.