Numerous nanostructured materials have been reported as efficient sulfur hosts to suppress the problematic “shuttling” of lithium polysulfides (LiPSs) in lithium‐sulfur (Li−S) batteries. However, direct comparison of these materials in their efficiency of suppressing LiPSs shuttling is challenging, owing to the structural and morphological differences between individual materials. This study introduces a simple route to synthesize a series of sulfur host materials with the same yolk‐shell nanospindle morphology but tunable compositions (Fe₃O₄, FeS, or FeS₂), which allows for a systematic investigation into the specific effect of chemical composition on the electrochemical performances of Li−S batteries. Among them, the S/FeS₂−C electrode exhibits the best performance and delivers an initial capacity of 877.6 mAh g⁻¹ at 0.5 C with a retention ratio of 86.7 % after 350 cycles. This approach can also be extended to the optimization of materials for other functionalities and applications.

中文翻译：

---

用于锂硫电池的基于蛋黄壳氧化铁/硫化物碳纳米纺锤的高效硫主体

据报道，许多纳米结构材料是有效的硫主体，可以抑制锂硫（Li−S）电池中多硫化锂（LiPS）的“穿梭”问题。然而，由于各个材料之间的结构和形态差异，直接比较这些材料抑制 LiPS 穿梭的效率具有挑战性。本研究介绍了一种简单的路线来合成一系列具有相同蛋黄壳纳米纺锤形貌但成分可调的硫主体材料（Fe ₃ O ₄、FeS 或 FeS ₂），从而可以系统地研究化学物质的具体效应成分对Li−S电池电化学性能的影响。其中，S/FeS ₂ -C电极表现出最好的性能，在0.5 C下的初始容量为877.6 mAh g ^-1，350次循环后的保留率为86.7%。这种方法还可以扩展到其他功能和应用的材料优化。