▎ 摘　　要

NOVELTY - Tin dioxide quantum dot-titanium carbide composite material comprises organ-type two-dimensional sheet structure of titanium carbide Ti3C2Tx, 1-6nm tin dioxide quantum dots SnO2QDs. USE - The material is useful as sulfur carrier, and lithium sulfur battery material anode (claimed). ADVANTAGE - The material: has improved the specific capacity of anode material, and multiplying power performance and cycle life (claimed); is simple and easy, and environmentally-friendly. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing tin dioxide quantum dot-titanium carbide composite material comprises (1) slowly adding 1 g titanium aluminum carbide powder into 20 ml hydrofluoric acid, ultrasonically treating for 0.5 hours, then magnetically stirring for 24 hours at 35℃, centrifuging the obtained solution at a rate of 3500 revolutions/minute, collecting the precipitate, washing with deionized water until the pH of the supernatant is more than 6, drying the precipitate overnight to obtain titanium carbide Ti3C2Tx with an accordion-type two-dimensional lamellar structure, (2) placing the tin(II) chloride dehydrate and thiourea in the deionized water, magnetically stirring at room temperature for 24 hours to obtain the yellow transparent tin oxide quantum dots/graphene oxide/polypyrrole (SnO2QDs) aqueous solution, transferring the solution to a hydrothermal reaction kettle, placing in the blast drying box for 6 hours at 200℃, centrifuging and washing to obtain the SnO2QDs, (3) mixing the SnO2QDs powder prepared in the step (2) with 0.022 g distilled water with 10℃ and stirring for 20 days, marking as solution A, mixing the Ti3C2Tx0.2 g prepared in the step (1) with 100 ml ethanol, ultrasonically treating for 0.5 hours, marking as solution B, slowly adding the solution A into the solution B, ultrasonically processing for 6 hours at low power, collecting brown precipitate by vacuum filtering, and using water and ethanol mixed solvent to wash for 3-5 times, vacuum drying at 60℃ for 10 hours.