Rationally designed FeCoNiCrMn high-entropy alloys nanoparticles hybridized rGO modified separator for highly efficient lithium-sulfur batteries

Lithium-sulfur batteries (LSBs) are featured with high specific energy density. Here the use of FeCoNiCrMn high-entropy alloys nanoparticles hybridized reduced graphene oxide (denoted as HEA/rGO) is proposed. HEA exhibits synergistic interactions between multiple metal cations in the Face Center Cubic (FCC) structure, resulting in strong chemical confinement and fast conversion kinetics of soluble LiPSs. By combining with the rGO matrix, the well-designed separator affords conductive network to expedite the diffusion of Li+ and exhibit excellent reaction kinetics. The HEA/rGO cell exhibits a high discharge capacity 1344.6 mAh/g at 0.1 C, and 758.5 mAh/g even at 2 C.