A thin multifunctional coating on a separator improves the cyclability and safety of lithium sulfur batteries
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c7sc01961k.pdf
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Checksum (MD5)
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Author(s)
Bai, Peng
Zhang, Xiaogang
Tang, Zilong
Xu, Guiyin
Yan, QingBo
Wang, Shitong
Kushima, Akihiro
Liu, Kai
Li, Ju
Date Issued
July 2017
Journal
Chemical Science
Publisher
Royal Society of Chemistry (RSC)
Citation
Xu, Guiyin, et al. “A Thin Multifunctional Coating on a Separator Improves the Cyclability and Safety of Lithium Sulfur Batteries.” Chemical Science, vol. 8, no. 9, 2017, pp. 6619–25. © 2017 The Royal Society of Chemistry
Version
Final published version
Abstract
Lithium-sulfur batteries are one of the most promising next-generation batteries due to their high theoretical specific capacity, but are impeded by the low utilization of insulating sulfur, unstable morphology of the lithium metal anode, and transport of soluble polysulfides. Here, by coating a layer of nano titanium dioxide and carbon black onto a commercial polypropylene separator, we demonstrate a new composite separator that can confine the polysulfides on the cathode side, forming a catholyte chamber, and at the same time block the dendritic lithium on the anode side. Lithium-sulfur batteries using this separator show a high initial capacity of 1206 mA h g-1and a low capacity decay rate of 0.1% per cycle at 0.5C. Analyses reveal the electrocatalytic effect and the excellent dendrite-blocking capability of the ∼7 m thick coating.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Terms of Use
Creative Commons Attribution 4.0 International License
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DOI of Published Version
https://doi.org/10.1039/C7SC01961K
