Room-temperature cycling of metal fluoride electrodes: Liquid electrolytes for high-energy fluoride ion cells.
Science
; 362(6419): 1144-1148, 2018 12 07.
Article
em En
| MEDLINE
| ID: mdl-30523107
ABSTRACT
Fluoride ion batteries are potential "next-generation" electrochemical storage devices that offer high energy density. At present, such batteries are limited to operation at high temperatures because suitable fluoride ion-conducting electrolytes are known only in the solid state. We report a liquid fluoride ion-conducting electrolyte with high ionic conductivity, wide operating voltage, and robust chemical stability based on dry tetraalkylammonium fluoride salts in ether solvents. Pairing this liquid electrolyte with a copper-lanthanum trifluoride (Cu@LaF3) core-shell cathode, we demonstrate reversible fluorination and defluorination reactions in a fluoride ion electrochemical cell cycled at room temperature. Fluoride ion-mediated electrochemistry offers a pathway toward developing capacities beyond that of lithium ion technology.
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MEDLINE
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En
Ano de publicação:
2018
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Article