Flower-like Bi2S3/rGO modified separator for lithium-sulfur batteries

A shuttle effect of polysulfide is one of the crucial barriers for Lithium-sulfur batteries (LSBs). Herein, a flower-like Bi2S3/reduced graphene oxide (rGO) modified separator was fabricated by simple solvothermal and filtration processes. Benefiting from the strong chemical capturing ability of flower-like Bi2S3 and conductive pathway derived from rGO, the modified separator obviously alleviated the polysulfide shuttling. The cell with the flower-like Bi2S3/rGO modified separator exhibits a reversible capacity of 600 mAh g−1 at 0.5C after 300 cycles and a rate capacity of 500 mAh g−1 at 2C.