A high-rate nonaqueous organic redox flow battery

Donghan Xu, Cuijuan Zhang*, Yihan Zhen, Yicheng Zhao, Yongdan Li*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Azobenzene (azoB) is a promising anode active material for nonaqueous redox flow battery (NARFB), but the battery performance assembled with azoB is rather poor. Here, we show that the rate performance of NARFB with azoB and 2,5-di-tert-butyl-1-methoxy-4-[2′-methoxyethoxy] benzene (DBMMB) as anolyte and catholyte active materials can be significantly enhanced by optimizing the solvent, supporting electrolyte, and membrane. The synergistic interaction among active materials, solvent (acetonitrile), supporting electrolyte (tetraethylammonium bis(trifluoromethylsulfonyl)imide), and membrane (Daramic 175) contributes to the high battery performance. It exhibits an energy efficiency of 63.5% even at an ultra-high current density of 100 mA cm−2. Furthermore, the battery delivers a peak power density of 336 mW cm−2 at the current density of 240 mA cm−2 with 0.25 M active materials, which is a new benchmark for NARFBs.

Original languageEnglish
Article number229819
Number of pages7
JournalJournal of Power Sources
Volume495
Early online date26 Mar 2021
DOIs
Publication statusPublished - 31 May 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • Electrochemical energy storage
  • Nonaqueous redox flow battery
  • Organic electroactive material

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