Lithium-sulfur (Li-S) batteries have been considered as one of the most promising energy storage systems owing to their high specific capacity, high energy density, and environmental benignity. However, Li-S batteries still suffer from severe polysulfide shuttle effect and sluggish reaction kinetics, which are the intrinsic bottlenecks for their practical applications. Multifarious strategies have been adopted to overcome these bottlenecks and achieve high sulfur utilization and capacity retention for Li-S batteries. Among them, functionalizing separators with catalytic materials can not only effectively inhibit polysulfides shuttle effect but also greatly accelerate sulfur redox reaction kinetics, which could be of great significance for the realization of Li-S batteries with high energy density and long cycle life. Here, we have comprehensively reviewed the recent progress of functional separators for Li-S batteries using various catalytic materials, including metals, metal compounds, metal-organic frameworks, covalent-organic frameworks, heterostructures, and metal-free materials. The preparations, characterizations, advantages, and limitations of these catalytic materials are summarized, aiming to shed fresh light on fundamental understanding of catalytic effects for the improved electrochemical performance. Furthermore, engineering of functional separators and prospects of future design for high-performance Li-S batteries are discussed.

锂硫（Li-S）电池因其高比容量，高能量密度和环境友好性而被认为是最有前途的储能系统之一。然而，Li-S电池仍然遭受严重的多硫化物穿梭效应和缓慢的反应动力学，这是其实际应用的固有瓶颈。已经采取了多种策略来克服这些瓶颈并实现Li-S电池的高硫利用率和容量保持能力。其中，用催化材料功能化的隔板不仅可以有效地抑制多硫化物的穿梭作用，而且可以大大促进硫的氧化还原反应动力学，这对于实现高能量密度，长寿命的锂硫电池具有重要意义。这里，我们已经全面回顾了使用各种催化材料（包括金属，金属化合物，金属有机骨架，共价有机骨架，异质结构和不含金属的材料）的Li-S电池功能隔板的最新进展。总结了这些催化材料的制备，表征，优点和局限性，以期使人们对催化作用的基础认识有新的了解，以提高电化学性能。此外，讨论了功能隔板的工程设计以及高性能Li-S电池的未来设计前景。和不含金属的材料。总结了这些催化材料的制备，表征，优点和局限性，以期使人们对催化作用的基础认识有新的了解，以提高电化学性能。此外，讨论了功能隔板的工程设计以及高性能Li-S电池的未来设计前景。和不含金属的材料。总结了这些催化材料的制备，表征，优点和局限性，以期使人们对催化作用的基础认识有新的了解，以提高电化学性能。此外，还讨论了功能隔板的工程设计以及高性能Li-S电池的未来设计前景。