Solvent-in-Salt Electrolytes for Fluoride Ion Batteries

Alshangiti, Omar; Galatolo, Giulia; Rees, Gregory J.; Guo, Hua; Quirk, James A.; Dawson, James A.; Pasta, Mauro

doi:10.1021/acsenergylett.3c00493

Cited by 13 publications

(15 citation statements)

References 30 publications

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“…More significantly, the chemical stability of fluorides was investigated through 19 F NMR coupled with pH measurements, demonstrating that HF formation was almost completely suppressed (Figure e and f). Therefore, the dissolution of active materials from electrodes such as Pb|PbF 2 and CuF 2 was inhibited, offering improved cycle stabilities …”

Section: Fluorine Chemistry In Rechargeable Fluoride-ion Batteriesmentioning

confidence: 99%

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Fluorine Chemistry in Rechargeable Batteries: Challenges, Progress, and Perspectives

Wang,

Yang,

Meng

et al. 2024

Chem. Rev.

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The renewable energy industry demands rechargeable batteries that can be manufactured at low cost using abundant resources while offering high energy density, good safety, wide operating temperature windows, and long lifespans. Utilizing fluorine chemistry to redesign battery configurations/components is considered a critical strategy to fulfill these requirements due to the natural abundance, robust bond strength, and extraordinary electronegativity of fluorine and the high free energy of fluoride formation, which enables the fluorinated components with cost effectiveness, nonflammability, and intrinsic stability. In particular, fluorinated materials and electrode|electrolyte interphases have been demonstrated to significantly affect reaction reversibility/kinetics, safety, and temperature tolerance of rechargeable batteries. However, the underlining principles governing material design and the mechanistic insights of interphases at the atomic level have been largely overlooked. This review covers a wide range of topics from the exploration of fluorinecontaining electrodes, fluorinated electrolyte constituents, and other fluorinated battery components for metal-ion shuttle batteries to constructing fluoride-ion batteries, dual-ion batteries, and other new chemistries. In doing so, this review aims to provide a comprehensive understanding of the structure− property interactions, the features of fluorinated interphases, and cutting-edge techniques for elucidating the role of fluorine chemistry in rechargeable batteries. Further, we present current challenges and promising strategies for employing fluorine chemistry, aiming to advance the electrochemical performance, wide temperature operation, and safety attributes of rechargeable batteries.

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Section: Fluorine Chemistry In Rechargeable Fluoride-ion Batteriesmentioning

confidence: 99%

“…Fluoride-ion chemical species and electronic environment: (e) pH as a function of concentration, suggesting a decrease in the HF content, and (f) 19 F NMR spectroscopy. Reproduced with permission from ref . Copyright 2023 American Chemical Society.…”

Section: Fluorine Chemistry In Rechargeable Fluoride-ion Batteriesmentioning

confidence: 99%

Fluorine Chemistry in Rechargeable Batteries: Challenges, Progress, and Perspectives

Wang,

Yang,

Meng

et al. 2024

Chem. Rev.

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“…). − The ARBs with nonmetallic cations (such as H + , H 3 O + , and NH 4 + ) − and anions (F – , Cl – , I – , and etc. ) − as charge carriers are an important choice to replace traditional metal ion batteries. Among them, NH 4 + with low molar mass (18 g mol –1 ), small hydration radius (3.31 Å), unique tetrahedral structure, hydrogen bonding chemical properties, easy recovery, and nontoxicity have attracted the attention of researchers. , Therefore, aqueous NH 4 + batteries/supercapacitors with inherent safety and abundant charge carriers (easily synthesized in industrial methods via hydrogen and nitrogen sources) have become competitive candidates .…”

Section: Introductionmentioning

confidence: 99%

Cobalt Ion-Stabilized VO₂ for Aqueous Ammonium Ion Hybrid Supercapacitors

Chen,

Tang,

et al. 2024

ACS Appl. Mater. Interfaces

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Aqueous ammonium ion hybrid supercapacitor (A-HSC) is an efficient energy storage device based on nonmetallic ion carriers (NH 4 + ), which combines advantages such as low cost, safety, and sustainability. However, unstable electrode structures are prone to structural collapse in aqueous electrolytes, leading to fast capacitance decay, especially in host materials represented by vanadium-based oxidation. Here, the Co 2+ preintercalation strategy is used to stabilize the VO 2 tunnel structure and improve the electrochemical stability of the fast NH 4 + storage process. In addition, the understanding of the NH 4 + storage mechanism has been deepened through ex situ structural characterization and electrochemical analysis. The results indicate that Co 2+ preintercalation effectively enhances the conductivity and structural stability of VO 2 , and inhibits the dissolution of V in aqueous electrolytes. In addition, the charge storage mechanisms of NH 4 + intercalation/deintercalation and the reversible formation/fracture of hydrogen bonds were revealed.

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“…The CuF 2 |LE3|Pb cell exhibits outstanding cycling performance and high specific capacity at the highest current density compared with other reported liquid FIBs (Figure D and Table S1). − Note that the dual-ion batteries involving other shuttling ions (e.g., K + , Na + ) apart from F – are not included in the comparison. The ChCl-regulated electrolyte also endows FIBs with superior rate performance.…”

mentioning

confidence: 99%

High-Capacity and Long-Cycling F-Ion Pouch Cells Enabled by Green Electrolytes

Yu,

Lin,

Lei

et al. 2024

ACS Energy Lett.

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Fluoride ion batteries (FIBs) hold promise as energy storage systems of high energy density and high safety. To proceed beyond the proof-ofconcept stage, however, working batteries with appealing specifications are yet to be demonstrated. Here, we present a rational design on liquid electrolytes for FIBs. The core idea is to employ a primary solvent, which enables the high solubility of fluoride salt CsF, and a solvation regulator, which can continuously tune the solubility of CsF. We propose ethylene glycol (EG) and choline chloride (ChCl) as the primary solvent and solvation regulator, respectively. The strategy allows for a balanced solvation strength to the F − ions for avoiding thermodynamic barriers at the interfaces between the electrodes and the electrolyte. The optimized EG-ChCl-CsF electrolyte enables us to fabricate a pouch cell exhibiting the initial and reversible capacities of 525 and ∼250 mA h/g, respectively. The high-rate capability close to 1 C (i.e., 166 mA h/g at 500 mA/g) is also demonstrated.

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Solvent-in-Salt Electrolytes for Fluoride Ion Batteries

Cited by 13 publications

References 30 publications

Fluorine Chemistry in Rechargeable Batteries: Challenges, Progress, and Perspectives

Fluorine Chemistry in Rechargeable Batteries: Challenges, Progress, and Perspectives

Cobalt Ion-Stabilized VO₂ for Aqueous Ammonium Ion Hybrid Supercapacitors

High-Capacity and Long-Cycling F-Ion Pouch Cells Enabled by Green Electrolytes

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Solvent-in-Salt Electrolytes for Fluoride Ion Batteries

Cited by 13 publications

References 30 publications

Fluorine Chemistry in Rechargeable Batteries: Challenges, Progress, and Perspectives

Fluorine Chemistry in Rechargeable Batteries: Challenges, Progress, and Perspectives

Cobalt Ion-Stabilized VO2 for Aqueous Ammonium Ion Hybrid Supercapacitors

High-Capacity and Long-Cycling F-Ion Pouch Cells Enabled by Green Electrolytes

Contact Info

Product

Resources

About

Cobalt Ion-Stabilized VO₂ for Aqueous Ammonium Ion Hybrid Supercapacitors