• Medientyp: E-Artikel
  • Titel: Stabilizing Effect of Polysulfides on Lithium Metal Anodes in Sparingly Solvating Solvents
  • Beteiligte: Reuter, Florian S. [VerfasserIn]; Huang, Chen-Jui [VerfasserIn]; Hsieh, Yi-Chen [VerfasserIn]; Dörfler, Susanne [VerfasserIn]; Brunklaus, Gunther [VerfasserIn]; Althues, Holger [VerfasserIn]; Winter, Martin [VerfasserIn]; Lin, Shawn D. [VerfasserIn]; Hwang, Bing-Joe [VerfasserIn]; Kaskel, Stefan [VerfasserIn]
  • Erschienen: Wiley-VCH, 2021
  • Erschienen in: Batteries & supercaps 4(2), 347 - 358 (2021). doi:10.1002/batt.202000190
  • Sprache: Englisch
  • DOI: https://doi.org/10.1002/batt.202000190
  • ISSN: 2566-6223
  • Entstehung:
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  • Beschreibung: Electrolytes with sparingly polysulfide solubility such as 1.5 M LiTFSI in tetramethylene sulfone (TMS) and 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether (TTE) are beneficial for the cycle stability of Li−S pouch cells. In this work, this specific electrolyte system and the role of dissolved polysulfides (PS) in symmetrical Li/Li cells is investigated. By studying varying TMS/TTE volume ratios and polysulfide addition aided by both ex situ and operando spectroscopic as well as microscopic techniques, the positive impact of PS on the lithium plating/stripping behavior is evaluated. The composition of the solid-electrolyte interphase (SEI) as well as the microscopic morphology differs for electrolytes with PS from those without PS addition. These findings are crucial for the development of electrolytes for cycle-stable Li−S prototype cells.
  • Zugangsstatus: Freier Zugang