▎ 摘　　要

NOVELTY - Preparing titanium carbide MXene functionalized graphene nanocomposite film involves etching raw material titanium aluminum carbide, using lithium fluoride (LiF) and hydrochloric acid (HCl) as etching agents, stirring and etching to obtain an organ-like MXene phase, ultrasonic stripping and centrifugal separation to obtain single layer of MXene nanosheet uniform aqueous solution, adding a single layer of MXene nanosheet uniform aqueous solution prepared by ultrasonic peeling and centrifugal separation to a graphene oxide (GO) aqueous solution, and performing ultrasonic treatment to form a single layer of MXene nanosheet and graphene oxide uniform dispersion, stirring and chemically reacting the single-layer MXene nanosheet. USE - Method for preparing titanium carbide MXene functionalized graphene nanocomposite film used in a flexible supercapacitor (claimed). ADVANTAGE - The method enables to prepare titanium carbide MXene functionalized graphene nanocomposite film has high-conductive MXene functionalized graphene nanocompositematerial film, very good flexibility, and exhibits a high volume energy density. DETAILED DESCRIPTION - Preparing titanium carbide MXene functionalized graphene nanocomposite film involves etching raw material titanium aluminum carbide, using lithium fluoride (LiF) and hydrochloric acid (HCl) as etching agents, stirring and etching to obtain an organ-like MXene phase, ultrasonic stripping and centrifugal separation to obtain single layer of MXene nanosheet uniform aqueous solution, adding a single layer of MXene nanosheet uniform aqueous solution prepared by ultrasonic peeling and centrifugal separation to a graphene oxide (GO) aqueous solution, and performing ultrasonic treatment to form a single layer of MXene nanosheet and graphene oxide uniform dispersion, stirring and chemically reacting the single-layer MXene nanosheet and graphene oxide uniform dispersion liquid described to obtain a MXene nanosheet and graphene oxide uniform dispersion liquid, subjecting to vacuum suction filtration of the uniform dispersion of MXene nanosheets and graphene oxide, where the single-layer MXene nanosheets and graphene oxide nanosheets in the uniform dispersion are prepared by self-assembly to obtain MXene functionalization Graphene oxide nanocomposite film MGO, the thickness of the prepared film is 2-10 micrometer, adjusting the quality of single-layer MXene nanosheets to prepare MXene functionalized graphene oxide nanocomposite films with different MXene nanosheet content. The obtained MXene functionalized graphene oxide nanocomposite film is reduced by hydroiodic acid (HI) to prepare MXene functional reduced graphene oxide nanocomposite film MrGO, and the thickness of the prepared film is 2-10 micrometer. The MXene functionalized reduced graphene oxide nanocomposite film is placed on the N,N of 1-aminopyrene-suberic acid bis(N-hydroxysuccinimide ester) (AD) molecule immersion in dimethylformamide solution for 2-24 hours is the preferred time to obtain MXene functionalized graphene nanocomposite film MrGO-AD, and the thickness of the prepared film is 2-10 micrometer. An INDEPENDENT CLAIM is included for a method for preparing a flexible supercapacitor, which involves heating polyvinyl alcohol and phosphoric acid (H3PO4)up to 90 degrees C until all are dissolved, then stirring the transparent PVA and phosphoric acid (H3PO-4) at a mass ratio of 1:1 for 12 hours, and then mixing the prepared MrGO-AD, immersing graphene nanocomposite film in PVA/H3PO4 gel electrolysis for 4 hours, reserving 0.5cm wide blank spaces at both ends, and taking immersed MrGO-AD film electrode out from the gel electrolyte and face to face, assembling together into a flexible supercapacitor, and connecting blank positions at both ends with copper wires with silver glue, and then testing relevant electrochemical performance, and measuring tests at room temperature using an electrochemical workstation.