Flexible NbSe₂/carbon nanofiber with enhanced redox kinetics for LiS batteries

The serious shuttle effect involving lithium polysulfides (LiPSs) stands as a critical obstacle impeding the advancement of lithium‑sulfur batteries (LSBs). In this paper, flexible NbSe₂/carbon nanofibers (CNF) film was fabricated through electrospinning and calcination processes. The NbSe₂/CNF film possesses efficient conductive network and strong chemical-capturing capabilities for LiPSs. Owing to the synergistic combination, the NbSe₂/CNF composite can remarkably alleviate the shuttling behavior of LiPSs. Consequently, the battery integrated NbSe₂/CNFs interlayer achieves a reversible capacity of 762 mAh g^-1 following 300 cycles at 0.5C. Furthermore, it shows superior rate performance, reaching a capacity of 475 mAh g^-1 when subjected to the high rate of 4C. This study offers a reasonable approach for manufacturing flexible interlayers with optimized structures to boost the electrochemical behavior of LSBs.