Synergistic Cation‐Anion Vacancies and Topological Morphology Tuning on TiO Nanoflower Spheres for Efficient Polysulfide Confinement and Catalysis in Lithium Sulfur Batteries

at 0.2C with a capacity retention of 83% after 80 cycles, and an ultralow decay rate of 0.035% per cycle over 1000 cycles at 1C. This study elucidates the synthesis-structure-performance relationship of vacancy-engineered TiO, providing a new approach to the designing of highly efficient functional modified separators for advanced Li─S batteries.