Journal article : Letter

Imidazolium-based ionic liquid electrolytes for fluoride ion batteries

Abstract:: The fluoride-ion battery (FIB) is a post-lithium anionic battery that utilizes the fluoride-ion shuttle, achieving high theoretical energy densities of up to 1393 Wh L–1 without relying on critical minerals. However, developing liquid electrolytes for FIBs has proven arduous due to the low solubility of fluoride salts and the chemical reactivity of the fluoride ion. By introducing a chemically stable electrolyte based on 1,3-dimethylimidazolium [MMIm] bis(trifluoromethanesulfonyl)imide [TFSI] and tetramethylammonium fluoride (TMAF), we achieve an electrochemical stability window (ESW) of 4.65 V, ionic conductivity of 9.53 mS cm–1, and a solubility of 0.67 m. The origin of this high solubility and the solvation structure were investigated using NMR spectroscopy and neutron total scattering, showing a fluoride solvation driven by strong electrostatic interactions and weak hydrogen bonding without covalent H–F character. This indicates the chemical stability of 1,3-dimethylimidazolium toward the fluoride ion and its potential as an electrolyte for high-voltage FIBs.

Publication status:: Published

Peer review status:: Peer reviewed

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APA Style

Alshangiti, O., Galatolo, G., Di Mino, C., Headen, T. F., Christianson, J., Merotto, S., Rees, G. J., Delavoux, Y., Swadźba-Kwaśny, M., & Pasta, M. (2024). Imidazolium-based ionic liquid electrolytes for fluoride ion batteries. ACS Energy Letters, 9(12), 6104–6108.

MLA Style

Alshangiti, O., et al. “Imidazolium-Based Ionic Liquid Electrolytes for Fluoride Ion Batteries.” ACS Energy Letters, vol. 9, no. 12, American Chemical Society, 2024, pp. 6104–08.

Chicago Style

Alshangiti, O, G Galatolo, C Di Mino, TF Headen, J Christianson, S Merotto, GJ Rees, Y Delavoux, M Swadźba-Kwaśny, and M Pasta. 2024. “Imidazolium-Based Ionic Liquid Electrolytes for Fluoride Ion Batteries.” ACS Energy Letters 9 (12): 6104–8.
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Files:: Alshangiti_et_al_2024_Imidazolium-based_ionic.pdf

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Publisher copy:: 10.1021/acsenergylett.4c02663

Authors

+ Alshangiti, O More by this author

Institution:: University of Oxford
Division:: MPLS
Department:: Materials
Role:: Author

+ Galatolo, G More by this author

Institution:: University of Oxford
Division:: MPLS
Department:: Materials
Role:: Author

+ Di Mino, C More by this author

Institution:: University of Oxford
Division:: MPLS
Department:: Materials
Role:: Author
ORCID:: 0000-0002-3211-2678

+ Headen, TF More by this author

Role:: Author
ORCID:: 0000-0003-0095-5731

+ Christianson, J More by this author

Institution:: University of Oxford
Division:: MPLS
Department:: Chemistry
Role:: Author
ORCID:: 0000-0002-7848-1970

More authors...

+ Engineering and Physical Sciences Research Council More from this funder

Funder identifier:: https://ror.org/0439y7842
Grant:: EP/R010145/1

Publisher:: American Chemical Society
Journal:: ACS Energy Letters More from this journal
Volume:: 9
Issue:: 12
Pages:: 6104-6108
Place of publication:: United States
Publication date:: 2024-11-27
Acceptance date:: 2024-11-13
DOI:: 10.1021/acsenergylett.4c02663
EISSN:: 2380-8195
Pmid:: 39698338

Language:: English
Subtype:: Letter
Pubs id:: 2070263
Local pid:: pubs:2070263
Deposit date:: 2025-01-04

Terms of use

Copyright holder:: Alshangiti et al
Copyright date:: 2024
Rights statement:: © 2024 The Authors. Published by American Chemical Society. This publication is licensed under CC-BY 4.0

Licence:: CC Attribution (CC BY)

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