▎ 摘　　要

NOVELTY - An egg yolk structured transition metal oxide/graphene composite material preparing method involves adding surface modified transition metal oxide with deionized water and alcohol ultrasonically, and dispersing with ethyl orthosilicate and ammonia water solution to react to obtain reacted product. The product is mixed with 3-aminopropyl triethoxysilane and placed in a hydrothermal reaction kettle, washed, and dried to obtain surface-modified transition metal oxide particle, which is dispersed in deionized water to obtain dispersion liquid, which is stirred with graphite alkene solution. USE - Method for preparing egg yolk structured transition metal oxide/graphene composite material that is utilized in lithium ion battery (claimed). ADVANTAGE - The method enables preparing the composite material with improved electrochemical performance. DETAILED DESCRIPTION - An egg yolk structured transition metal oxide/graphene composite material preparing method involves adding surface modified transition metal oxide with deionized water and alcohol ultrasonically, and dispersing with ethyl orthosilicate and ammonia water solution at 20-50 degrees C for 3-8 hours to react to obtain reacted product. The reacted product is mixed with 3-aminopropyl triethoxysilane and placed in a hydrothermal reaction kettle, washed, and dried to obtain surface-modified transition metal oxide particle, which is dispersed in deionized water to obtain dispersion liquid. The pH of the dispersion liquid is regulated to 1-4, and stirred with graphite alkene solution to obtain a mixture. The mixture is reacted with hydro-thermal kettle, extracted in strong alkali solution, centrifuged, washed and dried to obtain a finished product. An INDEPENDENT CLAIM is also included for an egg yolk structured transition metal oxide/graphene composite material prepared by the method.