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Mn2+doped BaSnF4-based solid state electrolyte for room-temperature fluoride ion batteries
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DOI：10.1016/j.jelechem.2023.117145.png)
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Abstract
En 中文
Rechargeable solid-state fluoride ion batteries (RT-SSFIB) are expected to become the leader of the new gen-eration of energy storage devices in order to fully respond to the growing demand for large energy storage devices. Theoretically, fluoride ion batteries have a high energy density (greater than 1000 Wh kg-1). However, the development and research of fluoride ion battery is still in the preliminary stage. Although in recent years, the study of solid electrolytes with good conductivity of fluoride ions at room temperature is pro-gressing rapidly, it still faces some challenges from electrode active material to electrolyte. In order to be able to make solid electrolyte up to the use of fluoride ion battery standards, herein a Ba1-xMnxSnF4 compound was designed and prepared. The conductivity of Ba0.96Mn0.04SnF4 is successfully improved from 9.6 x 10-5 S cm-1 to 2.7 x 10-4 S cm-1 by Mn2+ doping and sintering at 300 celcius for 2 h. In addition, Ba0.96Mn0.04SnF4 was used as electrolyte, BiF3 and Sn as electrodes to construct a RT-SSFIB. The results show that the assembled battery pro-vides 162 mAh/g capacity in first cycles and still retain 100 mAh/g capacity in the 50th cycle. Therefore, Mn2+ doping can effectively improve the ionic conductivity of BaSnF4, and thus promote the electrochemical perfor-mance of RT-SSFIB.
Keywords:
Room-temperature Solid-state fluoride ion
battery
Mn2+doped
Energy storage devices
Ion conductivity
All-Solid-State Batteries
Journal
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1.7W
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