Interface Design and Development of Coating Materials in Lithium–Sulfur Batteries

High‐energy Li‐S batteries have received extensive attention and are considered to be the most promising next‐generation electric energy storage devices beyond Li‐ion batteries. Interface design is an important direction to address challenges in the development of Li–S batteries. This review summarizes recently developed coatings and interlayer materials at various interfaces of Li–S batteries. In particular, advanced nanostructures and novel fabrication methods of coating and interlayer materials applied to Li–S batteries are highlighted. Furthermore, underlying mechanisms at the interfaces and electrochemical performance of the developed Li–S batteries are also discussed. Finally, existing challenges and the future development of interface design in high‐energy Li–S batteries are summarized and prospected.