▎ 摘　　要

NOVELTY - A N-doped graphene alkene material preparing method involves dispersing graphene oxide into deionized water to give 0.1-10 mg/mL graphene oxide dispersion. Dicyandiamide is dissolved in water to give 0.2-1.0 mol/L dicyandiamide solution, followed by dropping dicyandiamide solution into graphene oxide dispersion and dispersing at the frequency of 10-30 kHz for 10-60 minutes, to give a mixed solution, transferring mixed solution to a hydrothermal reaction kettle at 100-250 degrees C for 0.5-8 hours, cooling at room temperature, centrifuging, washing, dialysis, drying, to give product. USE - Method for preparing N-doped graphene alkene material that is utilized as battery cathode material. ADVANTAGE - The material increases discharge capacity performance to 385-580 mAh/g of the battery. DETAILED DESCRIPTION - A N-doped graphene alkene material preparing method involves dispersing graphene oxide into deionized water at frequency of 30-80 kHz for 10-100 minutes to give 0.1-10 mg/mL graphene oxide dispersion. Dicyandiamide is dissolved in water to give 0.2-1.0 mol/L dicyandiamide solution, followed by dropping dicyandiamide solution into graphene oxide dispersion at ratio of 0.5-2: 1, and dispersing at the frequency of 10-30 kHz for 10-60 minutes, to give a mixed solution, transferring mixed solution to a hydrothermal reaction kettle at 100-250 degrees C for 0.5-8 hours, cooling at room temperature, centrifuging, washing, dialysis, drying, to give product.