▎ 摘　　要

NOVELTY - A three-dimensional graphite alkenyl tin dioxide composite material preparing method involves preparing graphene metal oxide nano-sheet by mixing oxidized graphite alkene and dimethyl formamide solution ultrasonically to obtain mixture. The mixture is mixed with metal oxide precursor. The resultant mixture is mixed with hydrochloric acid ultrasonically to obtain reacted solution, which is centrifuged, followed by washing using deionized water to obtain graphene metal oxide nano-sheet concentrate. The concentrate is mixed with cross-linking agent, and de-ionized water to obtain mixed solution. USE - Method for preparing three-dimensional graphite alkenyl tin dioxide composite material for use in lithium ion battery (claimed). ADVANTAGE - The method enables preparing the composite material with excellent circulating stability, improved multiplying power property and better charging and discharging property. DETAILED DESCRIPTION - A three-dimensional graphite alkenyl tin dioxide composite material preparing method involves preparing graphene metal oxide nano-sheet by mixing oxidized graphite alkene and dimethyl formamide solution ultrasonically to obtain mixture. The mixture is mixed with metal oxide precursor, followed by preserving temperature at 60-90 degrees C for 12 hours. The resultant mixture is mixed with hydrochloric acid ultrasonically to obtain reacted solution, which is centrifuged, followed by washing using deionized water to obtain graphene metal oxide nano-sheet concentrate. The concentrate is mixed with cross-linking agent, and de-ionized water to obtain mixed solution. The mixed solution is concentrated by passing liquid nitrogen and dried under reduced pressure. The dried product is decompressed at 300 degrees C and carbonized for 2 hours and packaged to obtain finished product.