Lithium-sulfur (Li-S) batteries are a promising candidate for next-generation energy storage devices. However, rapid performance decay at high-sulfur-loading condition is emerged as one of the main obstacles restricting the practical application of Li-S batteries. Here we develop a facile electrospinning method for synthesizing the interconnected yolk-shell carbon nanospheres assembled fiber network to construct self-supporting sulfur cathodes. Benefiting from high surface area, nitrogen atom doping, and synergetic effect between yolk and shell, the yolk-shell carbon fiber network is a promising sulfur hosting material for high-sulfur-loading Li-S batteries. With 70 wt% and 4 mg cm⁻² of sulfur, the yolk-shell carbon fiber network derived self-supporting cathode exhibits a high capacity retention of 82.8% after 500 cycles at 1 C. In addition, the self-supporting cathode with 16 mg cm⁻² of sulfur delivers a stable areal capacity of 15.5 mAh cm⁻². This work provides a new strategy for the development of high-performance Li-S batteries.

锂硫（Li-S）电池是下一代储能设备的有希望的候选者。然而，在高硫负荷条件下，快速的性能衰减已成为限制Li-S电池实际应用的主要障碍之一。在这里，我们开发了一种简便的静电纺丝方法，用于合成相互连接的卵黄壳碳纳米球组装的纤维网络，以构建自支撑的硫阴极。受益于高表面积，氮原子掺杂以及蛋黄与壳之间的协同效应，蛋黄-壳碳纤维网络是用于高硫负载Li-S电池的一种有前途的含硫材料。含70 wt％和4 mg cm ^-2在1 C下经过500次循环后，由蛋黄壳碳纤维网络衍生的自支撑阴极表现出82.8％的高容量保持率。此外，具有16 mg cm ^-2硫的自支撑阴极可提供稳定的面积容量为15.5 mAh cm ^-2。这项工作为高性能Li-S电池的开发提供了新的策略。