An Aqueous Rechargeable Fluoride Ion Battery with Dual Fluoride Electrodes

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Xianhua Hou
  • Zishuai Zhang
  • Kaixiang Shen
  • Shikun Cheng
  • Qinyu He
  • Yumeng Shi
  • Ching-yuan Su
  • Lain-Jong Li
  • Fuming Chen

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)A2419-A2424
Journal / PublicationJournal of the Electrochemical Society
Volume166
Issue number12
Online published8 Jul 2019
Publication statusPublished - 2019

Abstract

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.

Research Area(s)

  • SOLID ELECTROLYTES, BISMUTH, CONDUCTIVITY, PERFORMANCE, COMPOSITE, CARBON, TEMPO

Citation Format(s)

An Aqueous Rechargeable Fluoride Ion Battery with Dual Fluoride Electrodes. / Hou, Xianhua; Zhang, Zishuai; Shen, Kaixiang; Cheng, Shikun; He, Qinyu; Shi, Yumeng; Yu, Denis Y. W.; Su, Ching-yuan; Li, Lain-Jong; Chen, Fuming.

In: Journal of the Electrochemical Society, Vol. 166, No. 12, 2019, p. A2419-A2424.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review