▎ 摘　　要

NOVELTY - Shell-shell-core structure graphene-carbon-silicon dioxide lithium ion battery cathode material comprises (a) adding ammonia and cetyltrimethylammonium bromide, controlling ammonia, adding ethyl orthosilicate, stirring, filtering, washing, drying, placing dried product, grinding, placing ground product and calcining, (b) adding multi-walled carbon nanotubes, stirring, adding potassium permanganate, stirring, adding beaker, thermally activating, heating, cooling, pouring and filtering with polytetrafluoroethylene membrane, placing obtained solid in deionized water, sonicating, dialysing in a dialysis bag, vacuum filtering and drying the mixture and (c) adding porous nano-silica to polyethylene glycol, placing in a water bath, ultrasonically dispersing, adding deionized water and graphene nanoribbons to the mixed solution, sonicating, filtering, drying and placing the product in an atmosphere tube furnace for a heat treatment process. USE - Used as shell-shell-core structure graphene-carbon-silicon dioxide lithium ion battery cathode material. ADVANTAGE - The cathode material: supports the porous nano-silica skeleton structure; improves the stability and integrity of the cathode material structure; prevents silicon dioxide from contacting the electrolyte, building a three-dimensional conductive network; improves the transmission rate of electrons; improves the conductivity of the electrode; and has excellent actual specific capacity, good cycle stability and excellent rate performance. DETAILED DESCRIPTION - Shell-shell-core structure graphene-carbon-silicon dioxide lithium ion battery cathode material comprises (a) adding ammonia and cetyltrimethylammonium bromide to ethanol, controlling 4 wt.% ammonia, stirring until it is clear, adding ethyl orthosilicate, uniformly stirring, filtering, washing, drying, placing dried product in a mortar, uniformly grinding, placing the ground product in a muffle furnace and calcining at 500-600 degrees C for 4-8 hours to obtain porous nano silica, (b) adding multi-walled carbon nanotubes to concentrated sulfuric acid, stirring well, adding potassium permanganate, uniformly stirring, adding beaker with the mixed solution in the water bath device, thermally activating at 50-60 degrees C for 20-40 minutes, heating to 65-75 degrees C for 5-10 minutes of stability, cooling, pouring the mixture into a refrigerated aqueous solution of hydrogen peroxide and filtering with a polytetrafluoroethylene membrane, placing the obtained solid in deionized water and sonicating for 20-40 minutes to disperse evenly, dialysing in a dialysis bag for 6-10 days, vacuum filtering and drying the mixture to obtain graphene nanoribbons and (c) adding porous nano-silica to polyethylene glycol, placing in a water bath, ultrasonically dispersing at 60-100 degrees C for 48-72 hours, adding deionized water and graphene nanoribbons to the mixed solution, sonicating at 50-70 degrees C for 1-3 hours to disperse uniformly, filtering, drying and placing the product in an atmosphere tube furnace for a heat treatment process.