▎ 摘　　要

The lithium-sulfur (Li-S) battery has drawn tremendous interest because of its superior theoretical specific capacity, while the shuttle effect of lithium polysulfides (LPSs) has greatly hindered its application. Herein, MOF-derived Fe3C compounded with the nitrogen-doped graphene-like carbon nanosheet, Fe3C/NG, was prepared and applied to realize a stable long cycle of Li-S batteries. With the catalytic and conductive Fe3C nanoparticles distributed on the conductive nitrogen-doped graphene-like carbon nanosheets, the Fe3C/NG composite could quickly adsorb and catalyze LPSs under a high current density or large sulfur loading, thus achieving high rate performance for the cell. Even at a current density of 6 C, the Li-S cell with the Fe3C/NG-coated separator can still have a specific capacity of 954.5 mA h/g at the first cycle, and maintain 439.9 mA h/g after 500 stable cycles. Meanwhile, when the cell has a high sulfur loading of 6.5 mg/cm(2), a stable specific capacity of 6.0 mA h/cm(2) could still be maintained at 0.1 C. Such a lightweight separator coating with excellent catalytic performance and conductivity can provide a good example for the search of catalytic coatings for the high-performance Li-S battery.