Solvation engineering of non-aqueous electrolytes for room-temperature fluoride-ion batteries

Fu, Z; Yang, X; Tian, Y; Hu, X; Wang, Y; Lin, L; Kang, F; Wang, G; Li, B; Zhou, D

Solvation engineering of non-aqueous electrolytes for room-temperature fluoride-ion batteries

Fu, Z Yang, X Tian, Y Hu, X Wang, Y Lin, L Kang, F Wang, G

Li, B Zhou, D

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Publisher:: ELSEVIER
Publication Type:: Journal Article
Citation:: Energy Storage Materials, 2024, 70
Issue Date:: 2024-06-01

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Field	Value	Language
dc.contributor.author	Fu, Z
dc.contributor.author	Yang, X
dc.contributor.author	Tian, Y
dc.contributor.author	Hu, X
dc.contributor.author	Wang, Y
dc.contributor.author	Lin, L
dc.contributor.author	Kang, F
dc.contributor.author	Wang, G https://orcid.org/0000-0003-4295-8578
dc.contributor.author	Li, B
dc.contributor.author	Zhou, D
dc.date.accessioned	2025-02-02T23:56:12Z
dc.date.available	2025-02-02T23:56:12Z
dc.date.issued	2024-06-01
dc.identifier.citation	Energy Storage Materials, 2024, 70
dc.identifier.issn	2405-8297
dc.identifier.issn	2405-8297
dc.identifier.uri	http://hdl.handle.net/10453/184807
dc.description.abstract	Fluoride-ion batteries (FIBs) with high energy density and low cost are a promising new generation battery system for renewable energy storage. However, their room-temperature operation is strongly impeded by the lack of compatible electrolytes. Herein, we demonstrate that a stable room-temperature FIB can be achieved by tailoring the solvation chemistry of a non-aqueous liquid electrolyte. As validated by computational modeling and spectroscopic investigations, the cost-efficient β-hydrogen-free tetramethylammonium fluoride (TMAF) salt can efficiently prevent Hofmann elimination-induced electrolyte decomposition. Meanwhile, the synergistic effect of strong-polarity solvent and anion acceptor additive endows the high salt solubility (up to 0.7 M) and room-temperature ionic conductivity (6.12×10−3 S cm−1 at 25 °C) for the electrolyte. Owing to the virtue of this new electrolyte design, the Zn\|\|CuF2 and Li\|\|CuF2 FIBs were successfully constructed, delivering high reversibility, stable interface, and extended life. This work offers a new pathway for clearing the formidable bottlenecks in developing high-performance Fluoride-ion batteries.
dc.language	English
dc.publisher	ELSEVIER
dc.relation	http://purl.org/au-research/grants/arc/DP230101579
dc.relation.ispartof	Energy Storage Materials
dc.relation.isbasedon	10.1016/j.ensm.2024.103533
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0904 Chemical Engineering, 0906 Electrical and Electronic Engineering
dc.title	Solvation engineering of non-aqueous electrolytes for room-temperature fluoride-ion batteries
dc.type	Journal Article
utslib.citation.volume	70
utslib.for	0904 Chemical Engineering
utslib.for	0906 Electrical and Electronic Engineering
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Science
pubs.organisational-group	University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	University of Technology Sydney/UTS Groups
pubs.organisational-group	University of Technology Sydney/UTS Groups/Centre for Clean Energy Technology (CCET)
utslib.copyright.status	closed_access	*
dc.date.updated	2025-02-02T23:56:10Z
pubs.publication-status	Published
pubs.volume	70

Abstract:

Fluoride-ion batteries (FIBs) with high energy density and low cost are a promising new generation battery system for renewable energy storage. However, their room-temperature operation is strongly impeded by the lack of compatible electrolytes. Herein, we demonstrate that a stable room-temperature FIB can be achieved by tailoring the solvation chemistry of a non-aqueous liquid electrolyte. As validated by computational modeling and spectroscopic investigations, the cost-efficient β-hydrogen-free tetramethylammonium fluoride (TMAF) salt can efficiently prevent Hofmann elimination-induced electrolyte decomposition. Meanwhile, the synergistic effect of strong-polarity solvent and anion acceptor additive endows the high salt solubility (up to 0.7 M) and room-temperature ionic conductivity (6.12×10−3 S cm−1 at 25 °C) for the electrolyte. Owing to the virtue of this new electrolyte design, the Zn||CuF2 and Li||CuF2 FIBs were successfully constructed, delivering high reversibility, stable interface, and extended life. This work offers a new pathway for clearing the formidable bottlenecks in developing high-performance Fluoride-ion batteries.

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http://hdl.handle.net/10453/184807