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A 63 m Superconcentrated Aqueous Electrolyte for High-Energy Li-Ion Batteries
Abstract
A water-in-salt electrolyte (WiSE) offers an electrochemical stability window much wider than typical aqueous electrolytes but still falls short in accommodating high-energy anode materials, mainly because of the enrichment of water molecules in the primary solvation sheath of Li + . Herein, we report a new strategy in which a non-Li cosalt was introduced to alter the Li + -solvation sheath structure. The presence of an asymmetric ammonium salt (Me 3 EtN·TFSI) in water increases the solubility of LiTFSI by two times, pushes the salt/water molar ratio from 0.37 in WiSE to an unprecedented value of 1.13, and significantly suppresses the water activity in both bulk electrolyte and the Li + -solvation sheath. This new 63 m (mol kg solvent –1 ) aqueous electrolyte (42 m LiTFSI + 21 m Me 3 EtN·TFSI) offers a wide potential window of 3.25 V and supports a 2.5 V aqueous Li-ion battery (LiMn 2 O 4 //Li 4 Ti 5 O 12 ) to deliver a high energy density of 145 Wh kg –1 stably over 150 cycles.
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Citations
Cites
Armand, M., & Tarascon, J.-M. (2008) · Nature · doi:10.1038/451652a · Cited by 19,612
“Water-in-salt” electrolyte enables high-voltage aqueous lithium-ion chemistries
Suo, L., Borodin, O., Gao, T., Olguin, M., Ho, J., Fan, X., Luo, C., Wang, C., & Xu, K. (2015) · Science · doi:10.1126/science.aab1595 · Cited by 3,821
Self-citation
Cited by
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Zhu, Z., Jiang, T., Ali, M., Meng, Y., Jin, Y., Cui, Y., & Chen, W. (2022) · Chemical Reviews · doi:10.1021/acs.chemrev.2c00289 · Cited by 1,769
Designing Advanced Lithium‐Based Batteries for Low‐Temperature Conditions
Gupta, A., & Manthiram, A. (2020) · Advanced Energy Materials · doi:10.1002/aenm.202001972 · Cited by 462
Electrochemical Zinc Ion Capacitors: Fundamentals, Materials, and Systems
Yin, J., Zhang, W., Alhebshi, N. A., Salah, N., & Alshareef, H. N. (2021) · Advanced Energy Materials · doi:10.1002/aenm.202100201 · Cited by 325
Water-in-salt electrolyte for safe and high-energy aqueous battery
Shen, Y., Liu, B., Liu, X., Liu, J., Ding, J., Zhong, C., & Hu, W. (2021) · Energy Storage Materials · doi:10.1016/j.ensm.2020.10.011 · Cited by 323
Historical development and novel concepts on electrolytes for aqueous rechargeable batteries
Chen, S., Zhang, M., Zou, P., Sun, B., & Tao, S. (2022) · Energy & Environmental Science · doi:10.1039/d2ee00004k · Cited by 308
Metadata
- Authors
- Chen, L., Zhang, J., Li, Q., Vatamanu, J., Ji, X., Pollard, T. P., Cui, C., Hou, S., Chen, J., Yang, C., Ma, L., Ding, M. S., Garaga, M., Greenbaum, S., Lee, H.-S., Borodin, O., Xu, K., & Wang, C.
- Venue
- ACS Energy Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2020-02-27
- Volume
- 5
- Issue
- 3
- Pages
- 968-974
- ISSN
- 2380-8195 (ISSN-L)
- OpenAlex
- W3008152979
- Cited by
- 314
- References
- 2
- FWCI
- 15.44
- Type
- journal article
- Language
- en
- Open access
- closed
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- Chen, L., Zhang, J., Li, Q., Vatamanu, J., Ji, X., Pollard, T. P., Cui, C., Hou, S., Chen, J., Yang, C., Ma, L., Ding, M. S., Garaga, M., Greenbaum, S., Lee, H.-S., Borodin, O., Xu, K., & Wang, C. (2020). A 63 m Superconcentrated Aqueous Electrolyte for High-Energy Li-Ion Batteries. ACS Energy Letters. https://doi.org/10.1021/acsenergylett.0c00348
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