Membrane material for lithium sulfur battery positive electrode

The invention discloses a membrane material for a lithium sulfur battery positive electrode, and belongs to the technical field of electrochemical batteries. The membrane material for making the lithium sulfur battery is designed against the disadvantages of poor conductivity, low active substance utilization rate and the like of traditional lithium sulfur batteries, and has the advantages of multilayer filter screen structure, prosperous gap, high conductivity, simple preparation technology and harmlessness to the environment. The membrane material for the positive electrode is placed between a positive plate and a diaphragm, so the dissolution of the polysulfide in the electrolyte in the charge and discharge process of the battery is effectively inhibited, and the corrosion of the polysulfide to a metallic lithium negative electrode is reduced. The lithium sulfur battery adopting the membrane material has a high active substance utilization rate and stable cycle performances, has an initial discharge specific capacity under a current density of 0.162mA/cm , and still has a discharge specific capacity of above 702mAh/g after 50 times cycle; and compared with traditional lithium sulfur batteries, the lithium sulfur battery adopting the membrane material has the advantages of excellent performances and low cost, and lays a good foundation for the marketization of the lithium sulfur battery.