Bis(2,2,2-trifluoroethyl) Ether As an Electrolyte Co-solvent for Mitigating Self-Discharge in Lithium–Sulfur Batteries
- 20 May 2014
- journal article
- letter
- Published by American Chemical Society (ACS) in ACS Applied Materials & Interfaces
- Vol. 6 (11), 8006-8010
- https://doi.org/10.1021/am501665s
Abstract
Lithium-sulfur batteries suffer from severe self-discharge because of polysulfide dissolution and side reaction. In this work, a novel electrolyte containing bis(2,2,2-trifluoroethyl) ether (BTFE) was used to mitigate self-discharge of Li-S cells having both low- and high-sulfur-loading sulfur cathodes. This electrolyte meaningfully decreased self-discharge at elevated temperature, though differences in behavior of cells with high- and low-sulfur-loading were also noted. Further investigation showed that this effect likely stems from the formation of a more robust protective film on the anode surface.Keywords
Funding Information
- Office of Vehicle Technologies Program (DE-EE0005475)
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