Synergistic Effects of Mixing Sulfone and Ionic Liquid as Safe Electrolytes for Lithium Sulfur Batteries
Abstract
Here we report a strategy of mixing both the ionic liquid and sulfone with synergistic effects of reducing viscosity, increasing ionic conductivity, reducing the polysulfide dissolution, and improving the safety. The mixtures of the ionic liquids and sulfones also show distinctly different physicochemical properties, including the thermal properties and crystallization behavior. Using these electrolytes, lithium sulfur batteries assembled with lithium and mesoporous carbon composites show a reversible specific capacity of 1265 mAh g-1 (second cycle) by using 40% 1.0 M LiTFSI in MPPY∙TFSI with 60% 1.0 M LiTFSI in MIPS in the first cycle. This capacity is slightly lower than what was obtained in the pure 1.0 M LiTFSI in the sulfone electrolytes; however, it exhibits an excellent cycling stability and remains as high as 655 mAh g-1 even after 50 cycles. Our strategy provides a method to alleviate the polysulfide dissolution and redox shuttle phenomenon, with an improved ionic conductivity at the same time.
- Authors:
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1392546
- DOE Contract Number:
- AC02-06CH11357
- Resource Type:
- Journal Article
- Journal Name:
- ChemSusChem
- Additional Journal Information:
- Journal Volume: 8; Journal Issue: 2; Journal ID: ISSN 1864-5631
- Publisher:
- ChemPubSoc Europe
- Country of Publication:
- United States
- Language:
- English
- Subject:
- electrochemistry; ionic liquids; lithium–sulfur batteries; polymers; sulfones
Citation Formats
Liao, Chen, Guo, Bingkun, Sun, Xiao-Guang, and Dai, Sheng. Synergistic Effects of Mixing Sulfone and Ionic Liquid as Safe Electrolytes for Lithium Sulfur Batteries. United States: N. p., 2014.
Web. doi:10.1002/cssc.201402800.
Liao, Chen, Guo, Bingkun, Sun, Xiao-Guang, & Dai, Sheng. Synergistic Effects of Mixing Sulfone and Ionic Liquid as Safe Electrolytes for Lithium Sulfur Batteries. United States. https://doi.org/10.1002/cssc.201402800
Liao, Chen, Guo, Bingkun, Sun, Xiao-Guang, and Dai, Sheng. 2014.
"Synergistic Effects of Mixing Sulfone and Ionic Liquid as Safe Electrolytes for Lithium Sulfur Batteries". United States. https://doi.org/10.1002/cssc.201402800.
@article{osti_1392546,
title = {Synergistic Effects of Mixing Sulfone and Ionic Liquid as Safe Electrolytes for Lithium Sulfur Batteries},
author = {Liao, Chen and Guo, Bingkun and Sun, Xiao-Guang and Dai, Sheng},
abstractNote = {Here we report a strategy of mixing both the ionic liquid and sulfone with synergistic effects of reducing viscosity, increasing ionic conductivity, reducing the polysulfide dissolution, and improving the safety. The mixtures of the ionic liquids and sulfones also show distinctly different physicochemical properties, including the thermal properties and crystallization behavior. Using these electrolytes, lithium sulfur batteries assembled with lithium and mesoporous carbon composites show a reversible specific capacity of 1265 mAh g-1 (second cycle) by using 40% 1.0 M LiTFSI in MPPY∙TFSI with 60% 1.0 M LiTFSI in MIPS in the first cycle. This capacity is slightly lower than what was obtained in the pure 1.0 M LiTFSI in the sulfone electrolytes; however, it exhibits an excellent cycling stability and remains as high as 655 mAh g-1 even after 50 cycles. Our strategy provides a method to alleviate the polysulfide dissolution and redox shuttle phenomenon, with an improved ionic conductivity at the same time.},
doi = {10.1002/cssc.201402800},
url = {https://www.osti.gov/biblio/1392546},
journal = {ChemSusChem},
issn = {1864-5631},
number = 2,
volume = 8,
place = {United States},
year = {Wed Nov 26 00:00:00 EST 2014},
month = {Wed Nov 26 00:00:00 EST 2014}
}
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