Thermally-responsive, nonflammable phosphonium ionic liquid electrolytes for lithium metal batteries: operating at 100 degrees celsius
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Thermally-responsive.pdf
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Author(s)
Lin, X.
Grinstaff, M. W.
Kavian, Reza
Lu, Y.
Hu, Q.
Shao-Horn, Yang
Date Issued
August 2015
Journal
Chemical Science
Publisher
Royal Society of Chemistry
Citation
Lin, X. et al. “Thermally-Responsive, Nonflammable Phosphonium Ionic Liquid Electrolytes for Lithium Metal Batteries: Operating at 100 Degrees Celsius.” Chem. Sci. 6.11 (2015): 6601–6606. © 2015 The Royal Society of Chemistry
Version
Final published version
Abstract
Rechargeable batteries such as Li ion/Li metal batteries are widely used in the electronics market but the chemical instability of the electrolyte limits their use in more demanding environmental conditions such as in automotive, oil exploration, or mining applications. In this study, a series of alkyl phosphonium ionic liquid electrolyte are described with high thermal stability and solubility for LiTFSI. A lithium metal battery (LMB) containing a tailored phosphonium ionic liquid/LiTFSI electrolyte operates at 100 °C with good specific capacities and cycling stability. Substantial capacity is maintained during 70 cycles or 30 days. Instant on-off battery operation is realized via the significant temperature dependence of the electrolyte material, demonstrating the robustness and potential for use at high temperature.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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Creative Commons Attribution 3.0 Unported license
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DOI of Published Version
https://doi.org/10.1039/c5sc01518a
