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Stabilization of gamma sulfur at room temperature to enable the use of carbonate electrolyte in Li-S batteries.
Stabilization of gamma sulfur at room temperature to enable the use of carbonate electrolyte in Li-S batteries.
- Source :
-
Communications chemistry [Commun Chem] 2022 Feb 10; Vol. 5 (1), pp. 17. Date of Electronic Publication: 2022 Feb 10. - Publication Year :
- 2022
-
Abstract
- This past decade has seen extensive research in lithium-sulfur batteries with exemplary works mitigating the notorious polysulfide shuttling. However, these works utilize ether electrolytes that are highly volatile severely hindering their practicality. Here, we stabilize a rare monoclinic γ-sulfur phase within carbon nanofibers that enables successful operation of Lithium-Sulfur (Li-S) batteries in carbonate electrolyte for 4000 cycles. Carbonates are known to adversely react with the intermediate polysulfides and shut down Li-S batteries in first discharge. Through electrochemical characterization and post-mortem spectroscopy/ microscopy studies on cycled cells, we demonstrate an altered redox mechanism in our cells that reversibly converts monoclinic sulfur to Li <subscript>2</subscript> S without the formation of intermediate polysulfides for the entire range of 4000 cycles. To the best of our knowledge, this is the first study to report the synthesis of stable γ-sulfur and its application in Li-S batteries. We hope that this striking discovery of solid-to-solid reaction will trigger new fundamental and applied research in carbonate electrolyte Li-S batteries.<br /> (© 2022. The Author(s).)
Details
- Language :
- English
- ISSN :
- 2399-3669
- Volume :
- 5
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Communications chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 36697747
- Full Text :
- https://doi.org/10.1038/s42004-022-00626-2