Atomically Dispersed Cr‐Enhanced Zeolite Catalysts for Accelerated Sulfur Conversion and Interphase Stabilization

Abstract The application of lithium–sulfur (Li‐S) batteries is severely limited by the shuttle effect and sluggish sulfur conversion at the cathode, as well as the instability of the Li anode interface. Catalyst design and the construction of a stable solid electrolyte interphase (SEI) are key strategies to overcome these challenges. Herein, a bifunctional catalyst is reported prepared by incorporating atomically dispersed chromium (Cr) sites into lithiated zeolites. This approach not only accelerates the conversion of sulfur species and effectively suppresses the shuttle effect, but also leverages residual sodium (Na) ions from the Na‐exchanged zeolite to form a robust fluorinated Li/Na hybrid SEI on the Li anode, thereby enhancing specific capacity and cycling stability. As a result, the Li─S battery employing this catalyst delivers an initial capacity of 1130.3 mAh g −1 at 0.5C and maintains 957.4 mAh g −1 after 100 cycles, and demonstrates impressive rate performance with a capacity of 701.3 mAh g −1 at 5C. Moreover, the pouch cell achieves an energy density of 366 Wh kg −1 , underscoring its exceptional potential for practical applications.