▎ 摘　　要

NOVELTY - Large scale preparation of high conductivity graphene, comprises: (i) subjecting the natural graphite sheet to chemical oxidation method and obtaining graphite oxide, and processing the graphite oxide in a microwave oven under the atmosphere of air, nitrogen, argon, hydrogen, ammonia or helium to obtain graphene precursor; (ii) adding hydroiodic acid to graphene precursor, and stirring under dark condition by placing in a magnetic stirrer to obtain half-reduced graphene; and (iii) centrifuging and separating the resulting mixture, washing by ethanol and drying at 10-50 degrees C. USE - The method is useful in preparing high conductivity graphene for electrode material of lithium ion battery. ADVANTAGE - The method is simple, safe and devoid from adding hydrazine reducing agent; has low equipment requirements, and is eco-friendly. DETAILED DESCRIPTION - Large scale preparation of high conductivity graphene, comprises: (i) subjecting the natural graphite sheet to chemical oxidation method and obtaining graphite oxide, and processing the graphite oxide for 3-10 minutes in a microwave oven under the atmosphere of air, nitrogen, argon, hydrogen, ammonia or helium to obtain graphene precursor, where the power in the oven is 0.7-0.8 KW; (ii) adding specific amount of hydroiodic acid to graphene precursor, where the molar ratio of graphene precursor and the hydroiodic acid is 3:1-10:1, and stirring under dark condition by placing in a magnetic stirrer for 10-24 hours at 25-40 degrees C to obtain half-reduced graphene; and (iii) centrifuging and separating the resulting mixture, washing by ethanol and drying at 10-50 degrees C.