▎ 摘　　要

NOVELTY - Preparing anode material of graphene/alumina coated lithium ion battery involves adding graphite and potassium perchlorate in a ratio of 1:4-12 in reaction vessel. Concentrated acid is added to the mixture. The ratio of the volume of concentrated acid and mass of the graphite is 60-180:1. The mixture is heated at 50-80 degrees C and stirred for 5-15 minutes. The reaction product is filtered, washed and processed ultrasonically to obtain graphene oxide acidic solution. The graphene oxide acidic solution is obtained by adding aluminum powder and graphite in a ratio of 3-9:1. USE - Method used for preparing anode material of graphene/alumina coated lithium ion battery (claimed). ADVANTAGE - The method enables to prepare anode material of lithium ion battery that has good processing performance, rate performance and cycle performance and safety performance, in a simple, quick, reaction and continuous manner that avoids introduction of impurity. DETAILED DESCRIPTION - Preparing anode material of graphene/alumina coated lithium ion battery involves adding graphite and potassium perchlorate in a ratio of 1:4-12 in reaction vessel. Concentrated acid is added to the mixture. The ratio of the volume of concentrated acid and mass of the graphite is 60-180:1. The mixture is heated at 50-80 degrees C and stirred for 5-15 minutes. The reaction product is filtered, washed and processed ultrasonically to obtain graphene oxide acidic solution. The graphene oxide acidic solution is obtained by adding aluminum powder and graphite in a ratio of 3-9:1. The mixture is stirred 0.3-2 hours and aqueous ammonia is added dropwise with stirring and precipitated. The ratio of aqueous ammonia solution and aluminum powder is 3-5:1. Hydrolyzing acid liquid is added dropwise to the filtrate to precipitate and aged to form graphene/aluminium oxide sol. Alumina sol is added into the graphene/lithium ion battery anode material and heated to 40-80 degrees C, stirred and reacted for 0.5-1.5 hours to obtain the graphene/oxide lithium ion battery anode material precursor. The graphene/oxide lithium ion battery anode material precursor is crushed and placed under an inert gas atmosphere for 3-9 hours to obtain the graphene/alumina-coated anode material of lithium ion battery.