▎ 摘　　要

NOVELTY - A graphene-coated aluminum oxide material preparing method involves stirring LPAN solution to obtain micro cyclized LPAN solution. The micro-cyclized LPAN solution is heat treated to form polyacrylonitrile oligomer. The thermally oxidized polyacrylonitrile oligomer and aluminum compound are mixed, and mixed solvent is added to obtain LPAN coated aluminum compound. The aluminum compound is dried, to give low-temperature carbonized precursor coated aluminum compound, followed by protecting low aluminum compound to obtain graphene-coated aluminum oxide material. USE - Method for preparing graphene-coated aluminum oxide material for lithium ion battery, conductive rubber filler, and conductive heat materials. ADVANTAGE - The material exhibits good electrolyte phase infiltration in ion battery, reduces internal resistance of the lithium ion battery, high stability, battery capacity and cycle characteristics, thus improving the overall performance of the battery. DETAILED DESCRIPTION - A graphene-coated aluminum oxide material preparing method involves stirring LPAN solution at 100-200 degrees C for 100-200 hours to obtain micro cyclized LPAN solution. The micro-cyclized LPAN solution is heat treated at 200-300 degrees C for 1-10 hours to form a polyacrylonitrile oligomer having a ladder structure of the thermal oxidation. The thermally oxidized polyacrylonitrile oligomer and a aluminum compound are mixed at ratio of 0.1-0.9: 1, and mixed solvent is added to obtain LPAN coated aluminum compound. The coated aluminum compound is dried in an oven at 200-250 degrees C for 1-10 hours, until the solvent is completely evaporated, to give low-temperature carbonized precursor coated aluminum compound, followed by protecting low-temperature carbonized precursor-coated aluminum compound under an inert atmosphere, an inert gas flow of 10-500 mL/min, calcinising at 700-2000 degrees C for 1-10 hours, to obtain graphene-coated aluminum oxide material. An INDEPENDENT CLAIM is also included for graphene-coated aluminum oxide material obtained by the method.