A long-life aqueous Fluoride-ion battery based on Water-in-salt electrolyte
A long-life aqueous Fluoride-ion battery based on Water-in-salt electrolyte
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DOI：
10.1016/j.inoche.2022.110275
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发表时间：
2022-12-13
影响因子：
3.8
通讯作者：
Zhao, Hu
中科院分区：
文献类型：
--
作者：
Fang, Ziren;Li, Mingqiang;Zhao, Hu
由于氟的高电负性和低重量，氟是设计离子穿梭电池系统的理想元素。然而，大多数氟离子电池采用固体电解质（SE），似乎很难采用水基电解质的氟离子电池，因为窄的电压窗口。本文提出了一种将KF盐包水电解液应用于铜锌电池的方法，构建了一种基于氟离子穿梭的电池体系。由于采用了新的阳极转换机制，放电平台提高到1.9 V，电池可稳定工作1600次。该电池充分利用了金属氟化物的高转换电压的优点，同时保持了铜锌电池的廉价、环保等特点，避免了锌枝晶的产生，为铜锌电池的可充性提供了一种新的策略。
Due to the high electronegativity and low weight, fluorine is an ideal element to design ion shuttle battery system. However, most fluoride-ion batteries apply solid electrolytes (SEs), it seems difficult to adopt water-based electrolyte in fluoride-ion batteries because of the narrow voltage window. In our work, we propose a method to apply KF water-in-salt electrolyte in Cu-Zn battery, construct a battery system based on the shuttle of fluoride-ion. Due to the new anode conversion mechanism, the discharge platform is improved to 1.9 V and the battery work steady for 1600 cycles. The battery takes the advantage of high conversion voltage of metal fluoride, while remains the Cu-Zn batteries' characteristics: low price, environmentally friendly etc. Our work not only avoid the generation of zinc dendrites, but also provide a new strategy to make Cu-Zn battery rechargeable.