The sluggish kinetics and pronounced shuttle effect of polysulfides in magnesium-sulfur batteries (MSB) pose formidable obstacles to achieving optimal electrochemical performance. To address these issues, we devised Co-GO@ZIF-C composite derived from GO@ZIF-8 with membrane wrapped structure as the host for the sulfur cathode. This unique structural design boasts enhanced electrical conductivity and superior adsorption capabilities for magnesium polysulfides, resulting in heightened sulfur utilization. At the same time, the incorporation of single cobalt atoms, leveraging their exceptional catalytic properties, acts as the catalyst to accelerate the conversion process of polysulfides. This synergistic combination of structural design and catalytic enhancement results in the S@Co-GO@ZIF-C composite exhibiting exceptional performance metrics. Specifically, the composite achieves a high discharge capacity of 870.6 mA h g^-1 at 0.3 C after 100 cycles, alongside outstanding high-rate performance and long cycling stability with maintaining a reversible capacity of 458.6 mA h g^-1 at 1 C for more than 400 cycles. This study provides an effective strategy on designing high-performance sulfur cathode in MSB.

中文翻译：

---

具有膜包裹结构的 Co-GO@ZIF-C 作为 Mg-S 电池的阴极


镁硫电池 （MSB） 中多硫化物的缓慢动力学和明显的穿梭效应对实现最佳电化学性能构成了巨大障碍。为了解决这些问题，我们设计了源自 GO@ZIF-8 的 Co-GO@ZIF-C 复合材料，具有膜包裹结构作为硫阴极的主体。这种独特的结构设计具有增强的导电性和对多硫化镁的卓越吸附能力，从而提高了硫的利用率。同时，单个钴原子的掺入利用其卓越的催化性能，作为催化剂加速多硫化物的转化过程。这种结构设计和催化增强的协同结合使 S@Co-GO@ZIF-C 复合材料表现出卓越的性能指标。具体来说，该复合材料在 100 次循环后在 0.3C 下实现了 870.6mAh ^g-1 的高放电容量，以及出色的高倍率性能和长循环稳定性，在 1C 下保持 458.6mAh ^g-1 的可逆容量超过 400 次循环。本研究为在 MSB 中设计高性能硫阴极提供了一种有效的策略。