▎ 摘　　要

NOVELTY - Chemical method for removing functional groups at low temperature, involves (i) taking supercapacitor carbon powder and exposing with a completely compatible blue-violet laser for 1-2 hours, (ii) transferring the super capacitor carbon powder to an air plasma atmosphere, and performing low-temperature plasma treatment for 1-3 minutes, and forming a slightly functional graphene surface on the surface of the super capacitor carbon powder, (iii) drying the super capacitor carbon powder after low-temperature plasma treatment, (iv) placing the dried super capacitor carbon powder in a quartz container, and moving to a infrared heat treatment furnace, and reacting under the protection of an inert atmosphere, where the flow rate of the inert atmosphere is 30-50 l/minute, and the infrared heat treatment is maintained at 400-550 degrees C for 3-4 hours, and (v) after the heat treatment is completed, maintaining under the protection of inert atmosphere and naturally cooling for 5-8 hours. USE - Chemical method for removing functional groups at low temperature. ADVANTAGE - The method eliminates functional groups, and improves electrochemical performance.