Lorenzo Carbone,† Mallory Gobet,‡ Jing Peng,‡,§ Matthew Devany,∥ Bruno Scrosati,⊥ Steve Greenbaum,*,‡ and Jusef Hassoun*,†
†Sapienza University of Rome, Chemistry Department, Piazzale Aldo Moro, 5, 00185, Rome, Italy
‡Department of Physics & Astronomy, Hunter College of the City University of New York, New York, New York 10065, United States
§Ph.D. Program in Chemistry, City University of New York, New York, New York 10016, United States
∥Department of Chemistry and Biochemistry, Hunter College of the City University of New York, New York, New York 10065, United States
⊥Elettrochimica ed Energia, Via di Priscilla, 22, 00199, Rome, Italy
COMPARATIVE STUDY OF ETHER-BASED ELECTROLYTES FOR APPLICATION IN LITHIUM−SULFUR BATTERY
ABSTRACT: Herein, we report the characteristics of electrolytes using various ether-solvents with molecular composition CH3O[CH2CH2O]nCH3, di ﬀering 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.