Pine Bark‐Derived Activated Carbon as a High‐Performance Sulfur Host for Lithium–Sulfur Batteries

Pine bark (PB)‐derived activated carbon is synthesized and used as a sulfur host for lithium–sulfur batteries. PB exhibits a high specific surface area of 2460 m 2 g –1 and nanoporosity, which facilitate polysulfide adsorption and ion transport. The PB–sulfur (PBS) cathode delivers an initial discharge capacity of 463 mAh g –1 at 1 C and retains 340 mAh g –1 after 400 cycles, corresponding to 73.4% capacity retention with only 0.077% loss per cycle. These results emphasize the remarkable cycling durability of PBS. Further, this study reports a promising strategy for converting biomass waste into high‐performance energy storage materials.