Solvent-in-Salt Electrolytes for Fluoride Ion Batteries.

Solvent-in-Salt Electrolytes for Fluoride Ion Batteries.
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DOI:
10.1021/acsenergylett.3c00493
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发表时间:
2023-06-09
期刊:
影响因子:
22
通讯作者:
Pasta, Mauro
Pasta, Mauro
中科院分区:
材料科学1区
文献类型:
--
作者:
Alshangiti, Omar;Galatolo, Giulia;Rees, Gregory J.;Guo, Hua;Quirk, James A.;Dawson, James A.;Pasta, Mauro

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The fluoride ion battery (FIB) is a promising post-lithium ion battery chemistry owing to its high theoretical energy density and the large elemental abundance of its active materials. Nevertheless, its utilization for room-temperature cycling has been impeded by the inability to find sufficiently stable and conductive electrolytes at room temperature. In this work, we report the use of solvent-in-salt electrolytes for FIBs, exploring multiple solvents to show that aqueous cesium fluoride exhibited sufficiently high solubility to achieve an enhanced (electro)chemical stability window (3.1 V) that could enable high operating voltage electrodes, in addition to a suppression of active material dissolution that allows for an improved cycling stability. The solvation structure and transport properties of the electrolyte are also investigated using spectroscopic and computational methods.
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