Lithium-Sulfur (Li-S)batteries are considered to be one of the most promising new types of high performance batteries because of their high theoretical capacity and energy density

which have the advantages of rich raw materials

good environmental protection and low cost.Li-S batteries are mainly composed of the cathode material

anode material

electrolyte and separator.And separator is one of the important parts of Li-S batteries

whose performance has great effect on the overall performance of batteries.In this paper

the developments of high quality separator materials of Li-S batteries are reviewed

including polyolefin

polyethylene oxide (PEO)

polyvinylidene fluoride (PVDF)

various blending polymer and nanofiber separators

and the development trends of separator materials for Li-S batteries are also prospected.Research results showed that the properties of Li-S batteries

including charge discharge capacity

cycle performance

ionic conductivity and coulomb efficiency could be improved and promoted by the preparation and modification of the separators.The separators prepared by electrospinning method were studied primarily as the Li-S battery separators because of the excellent pore structure.We believe that the nanofiber porous membranes will become a hotspot in the application and research of separator materials for lithium sulfur batteries because of their excellent pore structure and gelation characteristics.