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Back Cover: Electrolyte Mixtures Based on Ethylene Carbonate and Dimethyl Sulfone for Li‐Ion Batteries with Improved Safety Characteristics (ChemSusChem 11/2015)
Author(s) -
Hofmann Andreas,
Migeot Matthias,
Thißen Eva,
Schulz Michael,
Heinzmann Ralf,
Indris Sylvio,
Bergfeldt Thomas,
Lei Boxia,
Ziebert Carlos,
Hanemann Thomas
Publication year - 2015
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201500617
Subject(s) - electrolyte , dimethyl carbonate , ethylene carbonate , sulfone , battery (electricity) , chemical engineering , materials science , solvent , chemistry , organic chemistry , inorganic chemistry , methanol , polymer chemistry , electrode , power (physics) , physics , quantum mechanics , engineering
The Back Cover picture shows the enhancement of thermal safety of Li‐ion battery cells by modification of the electrolyte solvent composition. The substitution of volatile linear organic carbonates by dimethyl sulfone leads to an improvement of the flash point of the electrolyte formulation to >140 °C. Surprisingly, both solvents (ethylene carbonate and dimethyl sulfone) are solid at room temperature, but the electrolyte mixture remains in liquid state at temperatures of as low as 0–5 °C. The improvement in thermal safety is schematically depicted in the form of pouch cell images whereas it has been proven for coin cells in the manuscript. However, it should be noted that the use of particle‐coated PET‐based separators additionally contributes to cell safety. More details can be found in the Full paper by Hofmann et al. (DOI: 10.1002/cssc.201500263 ).