Room-temperature cycling of metal fluoride electrodes: Liquid electrolytes for high-energy fluoride ion cells

Davis, Victoria K.; Bates, Christopher M.; Omichi, Kaoru; Savoie, Brett M.; Momčilović, Nebojša; Xu, Qinghua; Wolf, Walter J.; Webb, Michael; Billings, Keith J.; Chou, Nam Hawn; Alayoǧlu, Selim; McKenney, Ryan K.; Darolles, Isabelle; Nair, Nanditha G.; Hightower, A.; Rosenberg, Daniel; Ahmed, Musahid; Brooks, Christopher J.; Miller, Thomas F.; Grubbs, Robert H.; Jones, Simon C.

doi:10.1126/science.aat7070

Cited by 200 publications

(224 citation statements)

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“…N,N,Ntrimethyl-N-neopentylammonium fluoride) dissolved in the simple organic solvent of bis(2,2,2-trifluoroethyl) ether (BTFE). [310] This electrolyte shows arobust chemical stability of the solvent and fluoride salt, al arge electrochemical window of 4.1 V( 0.75 m fluoride concentration), high ionic conductivities (1.5-3.5 mS cm À1 ), and ah igh fluoride-ion transport number (> 0.5). Reversible fluoride-ion transfer between the electrode and electrolyte has been demonstrated in three-electrode systems (half-cells) using the Cu@LaF 3 cathode or surface-treated Ce anode as the working electrode, Pt wire as the counter electrode,a nd Ag/Ag + as the pseudoreference electrode.…”

Section: Fluoride-ion Batteriesmentioning

confidence: 93%

Halide‐Based Materials and Chemistry for Rechargeable Batteries

et al. 2020

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Rechargeable batteries are considered one of the most effective energy storage technologies to bridge the production and consumption of renewable energy. The further development of rechargeable batteries with characteristics such as high energy density, low cost, safety, and a long cycle life is required to meet the ever‐increasing energy‐storage demands. This Review highlights the progress achieved with halide‐based materials in rechargeable batteries, including the use of halide electrodes, bulk and/or surface halogen‐doping of electrodes, electrolyte design, and additives that enable fast ion shuttling and stable electrode/electrolyte interfaces, as well as realization of new battery chemistry. Battery chemistry based on monovalent cation, multivalent cation, anion, and dual‐ion transfer is covered. This Review aims to promote the understanding of halide‐based materials to stimulate further research and development in the area of high‐performance rechargeable batteries. It also offers a perspective on the exploration of new materials and systems for electrochemical energy storage.

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Section: Fluoride-ion Batteriesmentioning

confidence: 93%

Halide‐Based Materials and Chemistry for Rechargeable Batteries

et al. 2020

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“…It is the raw feedstock for the majority of industrial flurochemicals, including the commercial polymers Teflon and Nafion [2]. Fluoride is also projected to be used in future generations of high power-density batteries [3].…”

Section: Introductionmentioning

confidence: 99%

Towards the implementation of an ion-exchange system for recovery of fluoride commodity chemicals. Kinetic and dynamic studies

Robshaw

Dawson

Bonser

2019

Chemical Engineering Journal

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“…Recently, a variety of secondary batteries have been developed . Our group selected and developed fluoride shuttle battery (FSB) with liquid‐electrolyte .…”

Section: Figurementioning

confidence: 99%

Electrochemical Performance of BiF₃‐BaF₂ Solid Solution with Three Different Phases on a Fluoride Shuttle Battery System

et al. 2020

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Solid solution of bismuth(III) fluoride (BiF 3 ) and barium(II) fluoride (BaF 2 ) with a variety of crystal structures was prepared, and their electrochemical performances were evaluated on a fluoride shuttle battery (FSB) system. BiF 3 -BaF 2 based solid solution (Bi 1-x Ba x F 3-x (x = 0) with orthorhombic phase, x = 0.2 with hexagonal phase, and x = 0.4 with cubic phase) were successfully obtained with the mechanical alloy method. The change from Bi 1-x Ba x F 3-x (x = 0) (orthorhombic) to x = 0.2 (hexagonal) improved the initial reversible capacity and the capacity retention during cycling. The change from x = 0.2 (hexagonal) to 0.4 (cubic) led to further improvement in capacity retention during cycling; however, the initial reversible capacity decreased due to the substitution of excess amount of barium that did not contribute to the redox reaction. For the BiF 3 -based compound, controlling the crystal structure and substitution of inactive element affected the FSB performance.Recently, a variety of secondary batteries have been developed. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] Our group selected and developed fluoride shuttle battery (FSB) with liquid-electrolyte. [18][19][20][21][22] The discharge (MF x + xe -! M + xF -; M: metal) and charge (M + xF -! MF x + xe -) reactions of metal fluoride (MF x ) electrode (e. g. bismuth(III) fluoride (BiF 3 )) on the FSB system was successful. [18][19][20][21][22] However, the FSB performance did not meet the requirement of the device; further performance improvement was required. It has been reported that compound with a variety of crystal structures and elemental composition can be used as active material for a secondary battery, and these factors greatly affected the electrochemical reaction mechanism and electrochemical performance. [23][24][25] Furthermore, the substitution of elements that did not participate in the redox reaction also affected the improvement of the battery performance, because it can contribute to the improvement of structure stability during the charge and discharge processes. [26][27][28] Bervas et al. reported that BiF 3 can be used as active material on lithium ion battery (LIB) system [29][30][31] and the battery performance of the BiF 3 electrode with orthorhombic and hexagonal phases were different. [29] There were some BiF 3 -based compounds with a variety of crystal structure such as orthorhombic, hexagonal, and cubic. [32][33][34] Previous report indicated that the barium can be substituted into BiF 3 and crystal structure of BiF 3 -BaF 2 solid solution was changed by the ratio of BiF 3 and BaF 2 . [32][33][34] Previously, we prepared the BiF 3 -BaF 2 solid solution with three types of crystal structures, and the effect of crystal structure on the electrochemical performance was evaluated on the LIB system. [35] The results indicated that the BiF 3 -BaF 2 compound with hexagonal phase showed higher electrochemical performance than those with orthorhombic and cubic phases. [35] We expected that a similar effect m...

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Room-temperature cycling of metal fluoride electrodes: Liquid electrolytes for high-energy fluoride ion cells

Cited by 200 publications

References 50 publications

Halide‐Based Materials and Chemistry for Rechargeable Batteries

Halide‐Based Materials and Chemistry for Rechargeable Batteries

Towards the implementation of an ion-exchange system for recovery of fluoride commodity chemicals. Kinetic and dynamic studies

Electrochemical Performance of BiF₃‐BaF₂ Solid Solution with Three Different Phases on a Fluoride Shuttle Battery System

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Room-temperature cycling of metal fluoride electrodes: Liquid electrolytes for high-energy fluoride ion cells

Cited by 200 publications

References 50 publications

Halide‐Based Materials and Chemistry for Rechargeable Batteries

Halide‐Based Materials and Chemistry for Rechargeable Batteries

Towards the implementation of an ion-exchange system for recovery of fluoride commodity chemicals. Kinetic and dynamic studies

Electrochemical Performance of BiF3‐BaF2 Solid Solution with Three Different Phases on a Fluoride Shuttle Battery System

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Electrochemical Performance of BiF₃‐BaF₂ Solid Solution with Three Different Phases on a Fluoride Shuttle Battery System