biostudies-literatureUnknown14(5)Xie DAlexander von Humboldt FoundationAlexander von Humboldt-StiftungCSC scholarshipNumerous 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 (Fe₃ O₄ , 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.ChemSusChem1404-1413https://www.ebi.ac.uk/biostudies/studies/S-EPMC7986775biostudies-literatureEfficient Sulfur Host Based on Yolk-Shell Iron Oxide/Sulfide-Carbon Nanospindles for Lithium-Sulfur Batteries.PMC7986775Xie DQuan TKochovski ZLu YMei SHark EXu YfalseEfficient Sulfur Host Based on Yolk-Shell Iron Oxide/Sulfide-Carbon Nanospindles for Lithium-Sulfur Batteries.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 (Fe₃ O₄ , 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.2021-01-01T00:00:00Z2021 Mar2024-11-13T05:46:44.129Z2024-11-13T05:46:44.129ZS-EPMC79867753344006810.1002/cssc.202002731