Journal article
Surface forces and structure in a water-in-salt electrolyte
- Abstract:
- Water-in-salt electrolytes are a fascinating new class of highly concentrated aqueous solutions with wide electrochemical stability windows that make them viable as aqueous battery electrolytes. However, the high ion concentration of water-in-salt electrolytes means that these systems are poorly understood when compared to more dilute electrolyte solutions. Here, we present direct surface force measurements across thin films of a water-in-salt electrolyte at several concentrations. We find that the electrolyte adopts a layered structure at charged interfaces composed of a nanostructure of a hydrated cation and nonaqueous anion-rich domains. These observations will aid in the interpretation of capacitance and double-layer behavior of water-in-salt electrolytes with consequences for their use in energy storage devices.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Supplementary materials, 1.8MB, Terms of use)
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(Preview, Accepted manuscript, 651.9KB, Terms of use)
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- Publisher copy:
- 10.1021/acs.jpclett.0c03718
Authors
- Publisher:
- American Chemical Society
- Journal:
- Journal of Physical Chemistry Letters More from this journal
- Volume:
- 12
- Issue:
- 6
- Pages:
- 1702–1707
- Publication date:
- 2021-02-09
- Acceptance date:
- 2021-02-03
- DOI:
- EISSN:
-
1948-7185
- Language:
-
English
- Keywords:
- Pubs id:
-
1160063
- Local pid:
-
pubs:1160063
- Deposit date:
-
2021-02-05
Terms of use
- Copyright holder:
- American Chemical Society
- Copyright date:
- 2021
- Rights statement:
- Copyright © 2021 American Chemical Society.
- Notes:
- This is the accepted manuscript version of the article. The final version is available online from American Chemical Society at https://doi.org/10.1021/acs.jpclett.0c03718
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