▎ 摘　　要

NOVELTY - Preparation of nitrogen-doped graphene/manganese dioxide/hollow sulfur composite material involves stirring sulfur powder and carbon disulfide to form a uniform solution, ball milling high purity nickel powder for 0.5-2 hours, adding nickel powder into the solution, stirring to form a uniform suspension, stirring for 0.5-1 hour, spray drying to form sulfur-coated spherical particles, stirring spherical particles and ferric chloride solution for 1-5 hours, washing using water, filtering, adding filtered precipitate into a solution containing manganese chloride and potassium permanganate, stirring to form a uniform suspension, heating, stirring, reacting at 50-70 degrees C for 5-30 minutes, centrifuging, washing using water to obtain manganese dioxide-coated sulfur particles, adding nitrogen-containing graphene oxide into water, ultrasonically dispersing to form a uniform suspension, adding manganese dioxide-coated sulfur particles, stirring for 5-30 minutes, suction filtering, and washing. USE - Preparation of nitrogen-doped graphene/manganese dioxide/hollow sulfur composite material. ADVANTAGE - The prepared composite material has improved electrochemical properties.