Recent advances in “water in salt” electrolytes for aqueous rechargeable monovalent-ion (Li+, Na+, K+) batteries
- Publisher:
- ELSEVIER
- Publication Type:
- Journal Article
- Citation:
- Journal of Energy Chemistry, 2022, 69, pp. 84-99
- Issue Date:
- 2022-01-01
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| Filename | Description | Size | |||
|---|---|---|---|---|---|
| 1-s2.0-S2095495621006872-main.pdf | 4.77 MB |
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Aqueous rechargeable batteries have attracted enormous attention owning to their intrinsic characteristics of non-flammability, low cost, and the superior ionic conductivity of the aqueous electrolyte. However, the narrow electrochemical stability window (1.23 V), imposed by hydrogen and oxygen evolution, constrains the overall energy density of batteries. The revolutionary “water-in-salt” electrolytes considerably expand the electrochemical stability window to 3 or even 4 volts, giving rise to a new series of high-voltage aqueous metal-ion chemistries. Herein, the recent advances in “water-in-salt” electrolytes for aqueous monovalent-ion (Li+, Na+, K+) rechargeable batteries have been systematically reviewed. Meanwhile, the corresponding reaction mechanisms, electrochemical performances and the existing challenges and opportunities are also highlighted.
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