The advances of lithium–sulfur (Li–S) batteries have long been challenged by the polysulfides shuttling and the intrinsically sluggish sulfur redox kinetics. Herein, Ag-decorated N-doped carbon (Ag-CN_x) is prepared through magnesiothermic reduction followed by a “silver mirror” reaction. Attributed to the high conductivity, porous architecture, strong absorbability, and catalytic effect, the as-developed Ag-CN_x, as an interlayer material in Li–S configuration, well confines active species within the cathodic side and simultaneously promotes the sulfur conversions bidirectionally to the final S/Li₂S product. As a result, fast and durable Li–S electrochemistry can be realized, exhibiting excellent cyclability over 550 cycles, superb rate capability up to 5C, and decent areal capacity of 4.8 mAh cm⁻² under raised sulfur loading of 4.1 mg cm⁻². This work provides a facile and effective pathway toward multifunctional that combines chemical binding and electrocatalysis, holding great promise in future development of high-performance Li–S batteries.

长期以来，锂硫（Li-S）电池的进步一直受到多硫化物穿梭和本质上缓慢的硫氧化还原动力学的挑战。在此，Ag 装饰的 N 掺杂碳 (Ag-CN _x ) 是通过镁热还原和“银镜”反应制备的。由于高导电性、多孔结构、强吸收性和催化作用，开发的 Ag-CN _x作为 Li-S 构型的夹层材料，将活性物质很好地限制在阴极侧，同时促进了硫的双向转化到最后的 S/Li ₂S 产品。因此，可以实现快速且耐用的 Li-S 电化学，在 550 次循环中表现出优异的循环性能、高达 5C 的优异倍率性能以及在 4.1 mg cm ^{-2 的}硫负载下达到 4.8 mAh cm ^{-2 的}可观面容量。这项工作为将化学结合和电催化相结合的多功能提供了一种简便有效的途径，在高性能锂硫电池的未来发展中具有广阔的前景。