LAUSR

Bifunctional interlayer prepared by the polypyrrole-coated vapor-grown carbon fiber was proposed for efficiently capturing polysulfide in Li–S battery (VGPY). The as-prepared bifunctional VGPY interlayer not only can physically adsorb the polysulfide but also can reduce the polarization of the sulfur cathode. The Li–S battery used bifunctional VGPY interlayer shows the first discharge capacity of 1204.51 mAh g−1 at 0.1 C, which is 426.56 mAh g−1 high than that without the interlayer, and the Li–S batteries capacity maintained at 1262.56 mAh g−1 at the current density of 0.1 C and 853.71 mAh g−1 at 0.5 C, respectively, after 300 cycles, demonstrating excellent cycle stability.