▎ 摘　　要

NOVELTY - Manufacture of carbon-coated tin nanoparticle-containing graphene sheet involves adding 0.02-0.5 g carbon-magnetite-doped graphene nanocomposite to 50-150 ml hydrochloric acid solution, stirring to obtain porous carbon network composite, dispersing 0.02-0.2 g carbon network composite in tin chloride-ethanol solution, stirring at 25-60 degrees C for 2-8 hours, centrifuging, washing with ethanol, adding 2-5 ml ammonia to catalyze the hydrolysis reaction, reacting for 20-120 minutes, washing, re-dispersing the treated material in tin chloride-ethanol solution, drying and heating. USE - Manufacture of carbon-coated tin nanoparticle-containing graphene sheet is used for electrode material of lithium battery (all claimed). ADVANTAGE - The method enables simple, efficient and economical manufacture of carbon-coated tin nanoparticle-containing graphene sheet with high productivity. The lithium battery formed using the carbon-coated tin nanoparticles-containing graphene sheet has excellent lithium-ion storage performance, cycle stability and rate performance. DETAILED DESCRIPTION - Manufacture of carbon-coated tin nanoparticle-containing graphene sheet involves dispersing an oxidized graphene in a solvent to obtain an oxidized graphene dispersion having an oxidized graphene concentration of 2-10 mg/ml, dissolving 0.02-0.2 g iron-containing compound in 2-10 ml solvent, adding 2-10 ml oxidized graphene dispersion, ultrasonically-dispersing for 15-60 minutes, adding 0.1-1 ml hydrogen peroxide, transferring the mixture into an autoclave, heating at 150-250 degrees C for 2-36 hours, cooling to room temperature, washing with absolute ethanol 3-10 times, drying in oven at 50-120 degrees C for 2-24 hours, heating 0.1-1 g dried product in a tube furnace at 350-700 degrees C under nitrogen atmosphere for 1-6 hours to obtain carbon-magnetite-doped graphene nanocomposite, adding 0.02-0.5 g carbon-magnetite-doped graphene nanocomposite to 50-150 ml hydrochloric acid solution having concentration of 0.5-5 M, stirring at 25-80 degrees C for 2-12 hours to obtain porous carbon network composite, dispersing 0.02-0.2 g carbon network composite in tin chloride-ethanol solution having concentration of 0.05-0.5 g/ml, stirring at 25-60 degrees C for 2-8 hours, centrifuging, washing with ethanol, adding 2-5 ml ammonia to catalyze the hydrolysis reaction, reacting for 20-120 minutes, washing, re-dispersing the treated material in tin chloride-ethanol solution, drying at 40-100 degrees C, and heating in tubular furnace at 300-700 degrees C under nitrogen atmosphere for 1-3 hours.