Lithium-sulfur (LiÀ S) batteries with high theoretical energy density have earned much attention in recent years. Nevertheless, the shuttle effect and tardy conversion of polysulfides severely hinder their practical applications. Herein, the highnitrogen-doped FeÀ NÀ C porous carbon nanosheets (denoted as ATÀ FeÀ NÀ CÀ Me) were synthesized and coated on separator as an effective electrocatalyst for LiÀ S batteries. Benefiting from the hierarchical porous carbon structure and rich FeÀ N x catalytic sites, the ATÀ FeÀ NÀ CÀ Me coating layer can effectively suppress the polysulfides shuttling and promote their redox conversion simultaneously. As a result, the LiÀ S batteries with ATÀ FeÀ NÀ CÀ Me modified separators deliver superior rate capability (785.5 mAh g À 1 at 4.0 C) and cycling stability (capacity decay rate of 0.065 % per cycle over 1000 cycles at 1.0 C). This work provides a new strategy to design efficient electrocatalyst with high-surface-area porous structure for high-performance LiÀ S batteries.
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