AI Article Synopsis
- Various nanostructured materials are used as sulfur hosts in lithium-sulfur batteries to reduce the shuttling of lithium polysulfides (LiPSs), a common issue affecting battery performance.
- This study presents a method to create sulfur host materials with a consistent yolk-shell nanospindle shape and varying compositions (Fe O , FeS, FeS ) for a more controlled comparison of their performances.
- The S/FeS -C electrode was found to be the most efficient, achieving an impressive initial capacity of 877.6 mAh/g and maintaining 86.7% capacity after 350 cycles, showing potential for wider application in optimizing materials.
Article Abstract
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 (Fe O , FeS, or FeS ), 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/FeS -C electrode exhibits the best performance and delivers an initial capacity of 877.6 mAh g 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.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7986775 | PMC |
| http://dx.doi.org/10.1002/cssc.202002731 | DOI Listing |
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