“Water-in-salt” electrolyte enables high-voltage aqueous lithium-ion chemistries
Abstract
A concentrated effort for battery safety: Aqueous electrolytes are limited to run below 1.23 V to avoid degradation. Suo et al. smash through this limit with an aqueous salt solution containing lithium (Li) bis(trifluoromethane sulfonyl)imide to create an electrolyte that has an electrochemical window of 3 V (see the Perspective by Smith and Dunn). They used extremely high-concentration solutions, which suppressed hydrogen evolution and electrode oxidation. At these concentrations, the Li solvation shell changes because there simply is not enough water to neutralize the Li + charge. Thus, flammable organic electrolytes could potentially be replaced with a safer aqueous alternative. Science , this issue p. 938 ; see also p. 918
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Suo et al. developed WiSEs to broaden the voltage window of electrolytes to 3 V, where a high concentration (21 M) of LiTFSI salt was dissolved in water and an anion-derived SEI was formed to inhibit water decomposition.
“Suo et al. [79] firstly developed WiSEs to broaden the voltage window of electrolytes to 3 V, where a high concentration (21 M) of LiTFSI salt was dissolved in water and an anion-derived SEI was formed to inhibit the decomposition of water.”
From Review on Low-Temperature Electrolytes for Lithium-Ion and Lithium Metal Batteries (2023) · cites this paper as [79]
Cites
Electrolytes and Interphases in Li-Ion Batteries and Beyond
Xu, K. (2014) · Chemical Reviews · doi:10.1021/cr500003w · Cited by 5,566 · see citing works
Self-citationRunaway risk of forming toxic compounds
Hammami, A., Raymond, N., & Armand, M. (2003) · Nature · doi:10.1038/424635b · Cited by 346 · see citing works
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“Suo et al. [79] firstly developed WiSEs to broaden the voltage window of electrolytes to 3 V, where a high concentration (21 M) of LiTFSI salt was dissolved in water and an anion-derived SEI was formed to inhibit the decomposition of water.”
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Self-citation
- Authors
- Suo, L., Borodin, O., Gao, T., Olguin, M., Ho, J., Fan, X., Luo, C., Wang, C., & Xu, K.
- Affiliations
- University of Maryland, College Park (US)
- DEVCOM Army Research Laboratory (US)
- Corresponding author
- Wang, Chunsheng
- Xu, Kang
- Venue
- Science
- Published
- 2015-11-20
- Volume
- 350
- Issue
- 6263
- Pages
- 938-943
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2229124923
- Cited by
- 3,821
- References
- 2
- Citations by year
- 2026: 378 · 2025: 492 · 2024: 450 · 2023: 432 · 2022: 510 · 2021: 440 · 2020: 431 · 2019: 292 · 2018: 207 · 2017: 113 · 2016: 72 · 2015: 1
- FWCI
- 63.07
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Science (publishedVersion)
- PubMed (publishedVersion)
- Funders
- DOE ARPA-E (DEAR0000389)
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced battery technologies research
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Advancements in Battery Materials
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Advanced Battery Materials and Technologies
- Keywords
- water-in-salt electrolytes, aqueous lithium-ion batteries, high-voltage electrolytes, electrochemical stability window, electrode-electrolyte interphase, concentrated aqueous electrolytes, cycling stability, Coulombic efficiency
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