Single‐Atom Catalyst‐Integrated Porous Organic Polymers for High‐Performance Lithium‐Sulfur Batteries

Abstract Lithium‐sulfur (Li‐S) batteries exhibit high energy density potential but suffer from lithium polysulfide (LPS) shuttling and sluggish conversion kinetics, hindering practical application. Here, a novel approach incorporating out‐of‐plane single‐atom catalysts (SACs) into a tetrathiocine‐linked porous organic polymer (POP) framework is introduced. This design enables precise spatial distribution of active metal sites, enhancing interactions with soluble LPSs. The out‐of‐plane configuration further supports unique coordination motifs, accelerating the transformation of soluble LPSs to solid phases and effectively mitigating the shuttle effect. The resultant Pt‐based SAC separator achieves outstanding catalytic efficiency, cycling stability, and capacity retention under high sulfur loading. The findings establish a foundational strategy that integrates advanced molecular design with electrochemical performance, offering a promising avenue for improving the practicality and efficiency of Li‐S battery technology.