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.