Fluorinated Ether Based Electrolyte for High-Energy Lithium-Sulfur Batteries: Li+ Solvation Role behind Reduced Polysulfide Solubility
Journal article, 2017

By employing new electrolytes, the polysulfide shuttle phenomenon, one of the main problems of lithium-sulfur (Li-S) batteries, can be significantly reduced. Here we present excellent Coulombic efficiencies as well as adequate performance of high-energy Li-S cells by the use of a fluorinated ether (TFEE) based electrolyte at low electrolyte loading. The observed altered discharge profile was investigated both by electrochemical experiments and an especially tailored COSMO-RS computational approach, while the details of the discharge mechanism were elucidated by two operando techniques: XANES and UV-vis spectroscopy. A significant decrease of polysulfide solubility compared to tetraglyme is due to different Li+ solvation mode.


Sara Drvarič Talian

National Institute of Chemistry

University of Ljubljana

Steffen Jeschke

Chalmers, Physics, Condensed Matter Physics

Alen Vizintin

National Institute of Chemistry

Klemen Pirnat

National Institute of Chemistry

Arcˇon Iztok

Jozef Stefan Institute

University of Nova Gorica

Giuliana Aquilanti

Elettra Sincrotrone Trieste

Patrik Johansson

Chalmers, Physics, Condensed Matter Physics

R. Dominko

National Institute of Chemistry

Alistore - European Research Institute

University of Ljubljana

Chemistry of Materials

0897-4756 (ISSN) 1520-5002 (eISSN)

Vol. 29 23 10037-10044

Areas of Advance



Materials Science

Subject Categories

Atom and Molecular Physics and Optics



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