High‐Density Oxygen Doping of Conductive Metal Sulfides for Better Polysulfide Trapping and Li2S‐S8 Redox Kinetics in High Areal Capacity Lithium–Sulfur Batteries

Exploring new materials and methods to achieve high utilization of sulfur with lean electrolyte is still a common concern in lithium-sulfur batteries. Here, high-density oxygen doping chemistry is introduced for making highly conducting, chemically stable sulfides with a much higher affinity to lithium polysulfides. It is found that doping large amounts of oxygen into NiCo