▎ 摘　　要

NOVELTY - A lithium titanate/graphene foam composite anode material preparing method ultrasonic cleaning of surface impurities by taking a piece of foamed nickel, introducing argon/hydrogen mixed gas into a tube furnace, removing the oxide layer on the nickel surface, introducing methane or acetylene gas to complete the growth of grapheme, cooling the sample and taking ferric chloride and hydrochloric acid in a mixed solution to remove foamed nickel, ensuring the titanium source and the lithium source, dissolving in a mixture of ethanol and ethanol-water, mixing and stirring, adding a piece of graphene foam, transferring to a stainless steel reaction vessel and cooling to obtain lithium titanate/graphene foam composite, using the obtained lithium titanate/graphene foam as a negative electrode material for a lithium ion battery, selecting a commercial material as a positive electrode, assembling a lithium ion composite supercapacitor by matching the product. USE - Method for preparing lithium titanate/graphene foam composite anode material. ADVANTAGE - The method enables preparing lithium titanate/graphene foam composite anode material with excellent electrochemical performance, simple and cost effective manner. DETAILED DESCRIPTION - A lithium titanate/graphene foam composite anode material preparing method ultrasonic cleaning of surface impurities by taking a piece of foamed nickel, introducing argon/hydrogen mixed gas into a tube furnace, argon gas flow rate of 500 sccm, hydrogen flow rate of 100 sccm, furnace temperature of 1000 degrees C, removing the oxide layer on the nickel surface for 10 minutes, the flow rate of argon gas is 800 sccm, the flow rate of hydrogen gas is 500 sccm, introducing the 100 sccm of methane or acetylene gas for 10 minutes to complete the growth of grapheme, cooling the sample and taking with 1 mol L-1 ferric chloride and 5wt% hydrochloric acid in a mixed solution to remove foamed nickel, ensuring the titanium source and the lithium source have an excess of 30% of lithium hydroxide according to a certain molar ratio, dissolving in a mixture of ethanol and ethanol-water, mixing and stirring, adding a piece of graphene foam, transferring to a stainless steel reaction vessel, heating it at 180 degrees C for 12 hours, keeping the precursor at 750 degrees C argon gas at a heating rate of 5 degrees C per minute for 6 hours and cooling to obtain lithium titanate/graphene foam composite, using the obtained lithium titanate/graphene foam as a negative electrode material for a lithium ion battery, selecting a commercial material as a positive electrode, assembling a lithium ion composite supercapacitor by matching the product, where lithium ion operating voltage range selected during battery testing is 1-2.5 V and the operating voltage range of the composite supercapacitor is 0.5-3 V.