▎ 摘　　要

NOVELTY - A three-dimensional carbon nanotube/nitrogen-doped graphene/sulfur electrode slice involves adding carbon nanotubes, graphite oxide and polyacrylonitrile to N-methylpyrrolidone, performing ultrasonic treatment of the resulting mixture, coating an aluminum foil over the resulting slurry and vacuum drying, heating the resulting electrode slice, cooling and completely inserting the electrode slice into a sodium thiosulfate solution, dripping in hydrochloric acid to the resulting solution until the pH of the solution reaches 6.5-7.5, removing the electrode slice, and drying. USE - Three-dimensional carbon nanotube/nitrogen-doped graphene/sulfur electrode slice is used for forming electrode of lithium-sulfur battery. ADVANTAGE - The slice can be directly applied to the positive electrode of a lithium-sulfur battery without adding a conductive agent and a binder, thus enables economical fabrication of the electrode of the battery. DETAILED DESCRIPTION - A three-dimensional carbon nanotube/nitrogen-doped graphene/sulfur electrode slice involves adding carbon nanotubes, graphite oxide and polyacrylonitrile to N-methylpyrrolidone, performing ultrasonic treatment of the resulting mixture, coating an aluminum foil over the resulting slurry and vacuum drying to obtain an electrode slice, heating the electrode slice at 400-500 degrees C in a muffle furnace under the protection of ammonia gas, naturally cooling the heated slice, completely inserting the electrode slice into a sodium thiosulfate solution, dripping in hydrochloric acid to the resulting solution until the pH of the solution reaches 6.5-7.5, removing the electrode slice, and drying.