Lithium-sulfur (Li-S) batteries hold their promise in high energy-density, low-cost energy storage. However, the areal sulfur loading and rate performance in most Li-S batteries do not suffice practical applications due to severe polysulfides shuttling and sluggish reaction kinetics. Here, we report a novel sulfur host comprising planted carbon nanotubes with embedded cobalt on a nitrogen doped hollow MXene scaffold. In this hierarchical structure, the macropores in the hollow scaffold facilitate mass transports and accommodate volumetric changes upon electrochemical lithiation/delithiation, while the cobalt, supported by the conductive carbon nanotube, accelerates polysulfides and Li₂S conversion kinetics. At last, the nitrogen dopants enhance the chemisorption of sulfur species on MXene. The above multiplexed functionality enables 840 stable cycles with high capacity 900 mAh g⁻¹ at 2.5 mg cm⁻² S-loading and 1C. Even at a sulfur loading of 6 mg cm⁻², we can still achieve 170 cycles with a capacity retention 85.8%.

锂硫（Li-S）电池在高能量密度，低成本储能方面有其前景。但是，由于严重的多硫化物穿梭和缓慢的反应动力学，大多数Li-S电池中的区域硫负荷和倍率性能不足以满足实际应用。在这里，我们报告了一种新型的硫主体，包括在氮掺杂的中空MXene支架上嵌入钴的种植碳纳米管。在这种分层结构中，中空支架中的大孔有助于质量传输并适应电化学锂化/脱锂化时的体积变化，而由导电碳纳米管支撑的钴则加速了多硫化物和Li ₂S转化动力学。最后，氮掺杂剂增强了硫对MXene的化学吸附。上述多路复用功能可实现840个稳定循环，并在2.5 mg cm ^-2 S负载和1C下具有900 mAh g ^-1的高容量。即使在硫载量为6 mg cm ^{-2的情况下}，我们仍然可以实现170个循环，容量保持率为85.8％。