A high-performance all-iron non-aqueous redox flow battery

Yihan Zhen, Cuijuan Zhang*, Jiashu Yuan, Yicheng Zhao, Yongdan Li

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

Abstract

An all-iron non-aqueous redox flow battery (NARFB) based on iron acetylacetonate (Fe(acac)3) anolyte and N-(ferrocenylmethyl)-N,N-dimethyl -N-ethylammonium bis(trifluoromethane-sulfonyl)imide (Fc1N112-TFSI) catholyte with an open circuit voltage of 1.34 V is designed. Due to the high electrochemical activity of the active species, the resultant battery demonstrates fairly high cycling performance and rate capability with anion exchange membrane FAP-375-PP. The Coulombic efficiency (CE) of 98.7%, voltage efficiency (VE) of 84.5%, and energy efficiency (EE) of 83.4% are achieved over 100 cycles at the current density of 10 mA cm−2. VE and EE can be further enhanced by employing mixed-reactant electrolyte as both anolyte and catholyte, which are 89.2% and 85.2%, respectively. The underlying reasons for the capacity decay are discussed for future optimization.

Original languageEnglish
Article number227331
JournalJournal of Power Sources
Volume445
DOIs
Publication statusPublished - 1 Jan 2020
MoE publication typeA1 Journal article-refereed

Keywords

  • Electrochemical energy storage
  • Non-aqueous electrolyte
  • Organometallic materials
  • Redox flow battery

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