An aqueous rechargeable fluoride ion battery with dual fluoride electrodes

Xianhua Hou, Zishuai Zhang, Kaixiang Shen, Shikun Cheng, Qinyu He, Yumeng Shi, Denis Y.W. Yu, Ching Yuan Su, Lain Jong Li, Fuming Chen

研究成果: 雜誌貢獻期刊論文同行評審

23 引文 斯高帕斯(Scopus)

摘要

An anion flow battery has recently emerged as an option to store electricity with high volumetric energy densities. In particular, fluoride ions are attractive for these batteries because they have the smallest size among anions, which is beneficial for charge transport. To date, reported fluoride ion batteries either operate with an ionic liquid, organic electrolyte or solid-state electrolyte at high temperatures. Herein, an aqueous fluoride ion flow battery is proposed that consists of bismuth fluoride as the anode, 4-hydroxy- TEMPO (TEMPO) as the cathode, and NaF salt solution as the aqueous electrolyte. During the charging process, bismuth fluoride electrochemically releases fluoride ions with the formation of bismuth metal, while TEMPO captures the fluoride ions. A reversible and stable discharge capacity of 89.5 mAh g-1 was achieved at 1000 mA g-1 after 85 cycles. The fluoride ion battery possesses excellent rate performance. To the best of our knowledge, this is the earliest demonstration that fluoride ion batteries can work in aqueous solutions, which can be used for future clean energy applications.

原文???core.languages.en_GB???
頁(從 - 到)A2419-A2424
期刊Journal of the Electrochemical Society
166
發行號12
DOIs
出版狀態已出版 - 2019

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