Enhanced lithium polysulfide adsorption on an iron-oxide-modified separator for Li-S batteries
Chemical Communications, ISSN: 1364-548X, Vol: 59, Issue: 20, Page: 2966-2969
2023
- 19Citations
- 5Captures
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Article Description
Lithium-sulfur (Li-S) batteries are candidates for next-generation energy storage systems because of their low cost, high theoretical specific capacity and safety. However, the serious lithium polysulfide (LiPS) shuttle effect leads to a loss of reactive active substances and reduction of coulombic efficiency. In the current work, iron oxide (IO-700)—prepared by calcining a mixture of carbon spheres and ferric nitrate under an air atmosphere at 700 °C—was designed as a separator modifier to effectively adsorb LiPSs and accelerate the kinetics of the transformation of the intermediates, thereby inhibiting the shuttle effect. Li-S batteries including IO-700 showed long-term stability for 1000 cycles at 1C, with a capacity decay rate per cycle of only 0.0487%. A theoretical calculation indicated that, due to strongly polar active sites, FeO adsorbed LiPSs effectively to suppress the shuttle effect. This work has highlighted the importance for Li-S batteries of strongly polar active sites for anchoring LiPSs to inhibit the shuttle effect.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85149048145&origin=inward; http://dx.doi.org/10.1039/d2cc06893a; http://www.ncbi.nlm.nih.gov/pubmed/36805071; https://xlink.rsc.org/?DOI=D2CC06893A; https://dx.doi.org/10.1039/d2cc06893a; https://pubs.rsc.org/en/content/articlelanding/2023/cc/d2cc06893a
Royal Society of Chemistry (RSC)
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