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Energies 2017, 10(9), 1312; doi:10.3390/en10091312

Ethyl Methyl Sulfone-Based Electrolytes for Lithium Ion Battery Applications

Helmholtz-Institute Münster, IEK-12, Forschungszentrum Jülich GmbH, Corrensstrasse 46, 48149 Münster, Germany
MEET Battery Research Center/Institute of Physical Chemistry, University of Münster, Corrensstrasse 46, 48149 Münster, Germany
Author to whom correspondence should be addressed.
Received: 20 July 2017 / Revised: 25 August 2017 / Accepted: 28 August 2017 / Published: 1 September 2017
(This article belongs to the Section Energy Storage and Application)
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Sulfone-based electrolytes, known for their higher oxidative stability compared to the typically used organic carbonate-based electrolytes, are considered promising electrolytes for high voltage cathode materials towards the objective of obtaining increased energy density in lithium ion batteries. Nevertheless, sulfones suffer from high viscosity as well as incompatibility with highly graphitic anode materials, which limit their application. In this paper, the effect of fluoroethylene carbonate (FEC) as an electrolyte additive for the application of ethyl methyl sulfone (EMS) electrolytes containing LiPF6 as conducting salt, is studied in graphite-based cells by means of selected electrochemical and spectroscopic methods. In addition, influence of ethylene acetate (EA) as co-solvent on the electrolyte viscosity and conductivity of the EMS-based electrolytes is discussed, revealing improved overall nickel cobalt manganese oxide (NMC)/graphite cell performance. X-ray photoelectron spectroscopy (XPS) measurements provide information about the surface chemistry of the graphite electrodes after galvanostatic cycling. The concept of EA as co-solvent is found to be applicable for other sulfones such as isopropyl methyl sulfone (MeiPrSO2) and ethyl isopropyl sulfone (EtiPrSO2). View Full-Text
Keywords: single solvent-based nonaqueous electrolyte; ethyl methyl sulfone; graphite; solid electrolyte interphase; fluoroethylene carbonate single solvent-based nonaqueous electrolyte; ethyl methyl sulfone; graphite; solid electrolyte interphase; fluoroethylene carbonate

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Hilbig, P.; Ibing, L.; Wagner, R.; Winter, M.; Cekic-Laskovic, I. Ethyl Methyl Sulfone-Based Electrolytes for Lithium Ion Battery Applications. Energies 2017, 10, 1312.

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