A study of perfluorocarboxylate ester solvents for lithium ion battery electrolytes
Abstract
We prepared several high-purity methyl perfluorocarboxylates (>99.5% purity by mole) and investigated as potential fluorine-rich electrolyte solvents in Li-ion batteries. The most conductive electrolyte, 0.1 M lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) in dimethyl perfluoroglutarate (PF5M2) (ionic conductivity 1.87 10-2 mS cm-1), is investigated in Si thin-film half-cells. The solid-electrolyteinterphase (SEI) formed by the PF5M2 electrolyte is composed of similar organic and inorganic moieties and at comparable concentrations as those formed by ethylene carbonate/dimethyl carbonate electrolytes containing LiPF6 and LiTFSI salts. But, the SEI formed by the PF5M2 electrolyte undergoes reversible electrochemical defluorination, contributing to the reversible capacity of the cell and compensating in part for capacity fade in the Si electrode. These electrolytes, though far from ideal, provide an opportunity to further develop predictions of suitable fluorinated molecules for use in battery solvents.
- Authors:
-
- Missouri Univ. of Science and Technology, Rolla, MO (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Missouri Univ. of Science and Technology, Rolla, MO (United States)
- Univ. of Missouri, Columbia, MO (United States)
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Energy Frontier Research Centers (EFRC) (United States). Fluid Interface Reactions, Structures and Transport Center (FIRST)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
- OSTI Identifier:
- 1265852
- Alternate Identifier(s):
- OSTI ID: 1253198
- Grant/Contract Number:
- AC05-00OR22725; DGE-1069091; AC05-06OR23100
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Power Sources
- Additional Journal Information:
- Journal Volume: 299; Journal Issue: C; Journal ID: ISSN 0378-7753
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE; SEI; LiTFSI; silicon thin-film; fluorinated electrolyte
Citation Formats
Fears, Tyler M., Sacci, Robert L., Winiarz, Jeffrey G., Kaiser, Helmut, Taub, Haskell, and Veith, Gabriel M. A study of perfluorocarboxylate ester solvents for lithium ion battery electrolytes. United States: N. p., 2015.
Web. doi:10.1016/j.jpowsour.2015.08.098.
Fears, Tyler M., Sacci, Robert L., Winiarz, Jeffrey G., Kaiser, Helmut, Taub, Haskell, & Veith, Gabriel M. A study of perfluorocarboxylate ester solvents for lithium ion battery electrolytes. United States. https://doi.org/10.1016/j.jpowsour.2015.08.098
Fears, Tyler M., Sacci, Robert L., Winiarz, Jeffrey G., Kaiser, Helmut, Taub, Haskell, and Veith, Gabriel M. Fri .
"A study of perfluorocarboxylate ester solvents for lithium ion battery electrolytes". United States. https://doi.org/10.1016/j.jpowsour.2015.08.098. https://www.osti.gov/servlets/purl/1265852.
@article{osti_1265852,
title = {A study of perfluorocarboxylate ester solvents for lithium ion battery electrolytes},
author = {Fears, Tyler M. and Sacci, Robert L. and Winiarz, Jeffrey G. and Kaiser, Helmut and Taub, Haskell and Veith, Gabriel M.},
abstractNote = {We prepared several high-purity methyl perfluorocarboxylates (>99.5% purity by mole) and investigated as potential fluorine-rich electrolyte solvents in Li-ion batteries. The most conductive electrolyte, 0.1 M lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) in dimethyl perfluoroglutarate (PF5M2) (ionic conductivity 1.87 10-2 mS cm-1), is investigated in Si thin-film half-cells. The solid-electrolyteinterphase (SEI) formed by the PF5M2 electrolyte is composed of similar organic and inorganic moieties and at comparable concentrations as those formed by ethylene carbonate/dimethyl carbonate electrolytes containing LiPF6 and LiTFSI salts. But, the SEI formed by the PF5M2 electrolyte undergoes reversible electrochemical defluorination, contributing to the reversible capacity of the cell and compensating in part for capacity fade in the Si electrode. These electrolytes, though far from ideal, provide an opportunity to further develop predictions of suitable fluorinated molecules for use in battery solvents.},
doi = {10.1016/j.jpowsour.2015.08.098},
journal = {Journal of Power Sources},
number = C,
volume = 299,
place = {United States},
year = {Fri Sep 18 00:00:00 EDT 2015},
month = {Fri Sep 18 00:00:00 EDT 2015}
}
Web of Science
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Works referencing / citing this record:
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