The critical challenge of suppressing the shuttle effect relies not only on efficient chemisorption but also on accelerating the reaction kinetics of polysulfides. Herein, cobalt carbide (Co 2 C)‐decorated sea‐anemone‐like reduced graphene oxide–carbon nanotube (Co 2 C@RGO–CNT) is designed as an efficient sulfur host to suppress polysulfide shuttling. The conductive and polar Co 2 C nanoparticles are employed as electrocatalysts to effectively entrap polysulfides and accelerate the redox kinetics of lithium polysulfides/sulfides, as revealed both theoretically and experimentally. Three‐dimensional sea‐anemone‐like Co 2 C@RGO–CNT architectures form continuous conductive networks and afford sufficient channels for electron transfer from RGO–CNT to Co 2 C nanoparticle surface, which accelerates the polysulfide conversion. As a result, the cathode with Co 2 C@RGO–CNT exhibits superior cycling stability with high capacity retention of 83.4% and 90.5% at a rate of 0.1C and 1C, respectively. This work highlights Co 2 C as a new electrocatalyst to promote immobilization and conversion of polysulfides for high‐performance lithium–sulfur batteries.
Wang et al. (Sun,) studied this question.