Comparative Study of Ether-Based Electrolytes for Application in Lithium鈥揝ulfur Battery

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• 作者：Lorenzo Carbone ; Mallory Gobet ; Jing Peng ; Matthew Devany ; Bruno Scrosati ; Steve Greenbaum ; Jusef Hassoun
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：July 1, 2015
• 年：2015
• 卷：7
• 期：25
• 页码：13859-13865
• 全文大小：540K
• ISSN：1944-8252

文摘

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鈥搒ulfur 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鈥揷arbon composite cathode by galvanostatic charge鈥揹ischarge 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鈥搒ulfur battery.