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ACS Appl Mater Interfaces. 2015 Jul 1;7(25):13859-65. doi: 10.1021/acsami.5b02160. Epub 2015 Jun 22.

Comparative Study of Ether-Based Electrolytes for Application in Lithium-Sulfur Battery.

Author information

1
†Sapienza University of Rome, Chemistry Department, Piazzale Aldo Moro, 5, 00185, Rome, Italy.
2
§Ph.D. Program in Chemistry, City University of New York, New York, New York 10016, United States.
3
∥Department of Chemistry and Biochemistry, Hunter College of the City University of New York, New York, New York 10065, United States.
4
⊥Elettrochimica ed Energia, Via di Priscilla, 22, 00199, Rome, Italy.

Abstract

Herein, we report the characteristics of electrolytes using various ether-solvents with molecular composition CH3O[CH2CH2O]nCH3, differing by chain length, and LiCF3SO3 as the lithium salt. The electrolytes, considered as suitable media for lithium-sulfur batteries, are characterized in terms of thermal properties (TGA, DSC), lithium ion conductivity, lithium interface stability, cyclic voltammetry, self-diffusion properties of the various components, and lithium transference number measured by NMR. Furthermore, the electrolytes are characterized in lithium cells using a sulfur-carbon composite cathode by galvanostatic charge-discharge tests. The results clearly evidence the influence of the solvent chain length on the species mobility within the electrolytes that directly affects the behavior in lithium sulfur cell. The results may effectively contribute to the progress of an efficient, high-energy lithium-sulfur battery.

KEYWORDS:

NMR; diffusion; electrolytes; ether-based; glyme; lithium−sulfur battery

PMID:
26057152
DOI:
10.1021/acsami.5b02160
[Indexed for MEDLINE]

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