Fluorinated Ether Based Electrolyte for High-Energy Lithium–Sulfur Batteries: Li+ Solvation Role Behind Reduced Polysulfide Solubility | Zendy

Sara Drvarič Talian | Zendy; Steffen Jeschke | Zendy; Alen Vižintin | Zendy; Klemen Pirnat | Zendy; Iztok Arčon | Zendy; Giuliana Aquilanti | Zendy; Patrik Johansson | Zendy; Robert Dominko | Zendy

Open Access

Fluorinated Ether Based Electrolyte for High-Energy Lithium–Sulfur Batteries: Li⁺ Solvation Role Behind Reduced Polysulfide Solubility

Author(s) -

Sara Drvarič Talian,

Steffen Jeschke,

Alen Vižintin,

Klemen Pirnat,

Iztok Arčon,

Giuliana Aquilanti,

Patrik Johansson,

Robert Dominko

Publication year - 2017

Publication title -

chemistry of materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.741

H-Index - 375

eISSN - 1520-5002

pISSN - 0897-4756

DOI - 10.1021/acs.chemmater.7b03654

Subject(s) - polysulfide , electrolyte , solvation , faraday efficiency , solubility , electrochemistry , lithium (medication) , chemistry , inorganic chemistry , ether , sulfur , battery (electricity) , lithium perchlorate , chemical engineering , materials science , ion , organic chemistry , electrode , thermodynamics , medicine , power (physics) , physics , engineering , endocrinology

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.

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