▎ 摘　　要

NOVELTY - Preparing MXene-WS2 heterogeneous structure material for lithium sulfur battery, involves: (a) preparing graphene-like single-layer Ti3C2Tx material dissolved in hydrochloric acid solution, fully stirring under ice bath condition, adding titanium-aluminum carbide (Ti3AlC2) material, where for each 30-50 ml hydrochloric acid solution, adding lithium fluoride, Ti3AlC2 material; continuously stirring, etching, inserting layer, acid washing for some times, washing and removing excess lithium fluoride (LiF) in the solution, and performing ultrasonic treatment; and (b) preparation MXene-WS2 heterogeneous structure material by dissolving the tungsten chloride (WCl6) in deionized water, stirring under ice bath condition, obtaining MXene material, ultrasonic stirring and dispersing, then adding thioacetamide (TAA), fully stirring and dissolving, placing the mixed solution in reaction kettle for hydrothermal reaction, washing the product, water vacuum filtering and freezing. USE - The method is useful for preparing MXene-WS2 heterogeneous structure material for lithium sulfur battery (claimed), which is useful in mobile phone, notebook computer, electric vehicle, street lamp spare power supply and household small appliance. ADVANTAGE - The method utilizes salt and acid mixing etching preparation of MXene, which can reduce the environment pollution, improve the operation safety, reduce MXene material cost preparation and it only needs one-step hydrothermal method to prepare the MXene- WS2 heterogeneous structure material, the operation process is simple and easy to obtain; and provides MXene with excellent conductivity and WS2 outstanding catalytic activity which can improve the lithium-sulfur battery specific capacity, improves the reaction dynamics, accelerating polysulfide conversion, and the contact interface (heterogeneous structure) between the two can generate more catalytic/adsorption activity sites, promoting electron transfer, improving the multiplying power performance and the cycle stability of the battery. DETAILED DESCRIPTION - Preparing MXene-WS2 heterogeneous structure material for lithium sulfur battery, involves: (a) preparing graphene-like single-layer Ti3C2Tx material dissolved in hydrochloric acid solution, fully stirring under ice bath condition, adding titanium-aluminum carbide (Ti3AlC2) material, where for each 30-50 ml hydrochloric acid solution, adding 3-4 g lithium fluoride, 1-3 g Ti3AlC2 material; continuously stirring for 24-96 minutes at 35-45degrees Celsius, etching, inserting layer, after centrifuging, acid washing for some times, washing and removing excess lithium fluoride (LiF) in the solution, dissolving the obtained MXene material precipitate in the deionized water; performing ultrasonic treatment in the presence of inert gas, freeze drying after centrifuging to obtain the graphene-like single-layer Ti3C2Tx material; and (b) preparation MXene WS2 heterogeneous structure material by dissolving the tungsten chloride (WCl6) in 50-50 ml deionized water, stirring under ice bath condition to obtain the solution, obtaining 0.0225-0.1124 mmol/ml MXene material, ultrasonic stirring and dispersing, then adding 0.0114-0.0568 mol thioacetamide (TAA), fully stirring and dissolving, placing the mixed solution in 100 ml reaction kettle for hydrothermal reaction, where the hydrothermal reaction temperature is 255-275degrees Celsius, and the time is 12-36 hours, after hydrothermal reaction, washing the product by multiple times, water vacuum filtering and freezing to dry MXene-WS2 heterogeneous structure material. The mole ratio of MXene and WCl6 in the second step is 1:1-1:15. An INDEPENDENT CLAIM is included for use of MXene-WS2 heterogeneous structure material is claimed for lithium sulfur battery, which involves applying MXene-WS2 heterogeneous structure material to modified commercial lithium sulfur battery PP diaphragm to obtain modified diaphragm.