FSI-inspired solvent and “full fluorosulfonyl” electrolyte for 4 V class lithium-metal batteries
Name
c9ee02538c.pdf
Description
Published version
Size
3.69 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Xue, Weijiang
Shi, Zhe
Huang, Mingjun
Feng, Shuting
Wang, Chao
Wang, Fei
Lopez, Jeffrey
Qiao, Bo
Xu, Guiyin
Zhang, Wenxu
Date Issued
November 2019
Journal
Energy & Environmental Science
Publisher
Royal Society of Chemistry (RSC)
Citation
Xue, Weijiang et al. "FSI-inspired solvent and “full fluorosulfonyl” electrolyte for 4 V class lithium-metal batteries." Energy & Environmental Science 13, 1 (January 2020): 212-220 © 2020 The Royal Society of Chemistry.
Version
Final published version
Abstract
High-voltage rechargeable lithium-metal batteries (LMBs) require electrolytes that are compatible with both the Li metal anode (LMA) and the metal-oxide cathode. Herein, by imitating the fluorosulfonyl imide group from a well-known LMA-compatible salt, lithium bis(fluorosulfonyl) imide (LiFSI), we come up with an organic solvent dimethylsulfamoyl fluoride (FSO[subscript 2]NC[subscript 2]H[subscript 6]), a fluorosulfonamide (FSA) with two methyl substituents, to develop a new "full fluorosulfonyl" (FFS) electrolyte. Remarkably, it enables a highly reversible LMA with an excellent initial coulombic efficiency (CE) ∼91%, and rapidly approaching 99% within only 10 cycles, with average CE outperforming the well-known LMA-compatible fluoroethylene carbonate (FEC)-based electrolyte. Furthermore, benefitting from its high anodic stability against the oxidative LiNi[subscript 0.6]Mn[subscript 0.2]Co[subscript 0.2]O[subscript 2] (NMC622) and LiMn[subscript 2]O[subscript 4] (LMO) surfaces, the LiNMC622 cell retains 89% of its original capacity after 200 cycles using a limited Li excess anode. This electrolyte design strategy opens a new avenue for exploring new medium-concentration organic electrolytes for 4 V class lithium-metal batteries (LMBs).
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Massachusetts Institute of Technology. Department of Chemistry
Massachusetts Institute of Technology. Department of Chemical Engineering
Massachusetts Institute of Technology. Research Laboratory of Electronics
Massachusetts Institute of Technology. Department of Mechanical 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/c9ee02538c
