Study of tetraethylammonium bis(trifluoromethylsulfonyl)imide as a supporting electrolyte for an all-organic redox flow battery using Benzophenone and 1,4-di-tert-butyl-2,5-dimethoxybenzene as active species

Xiang Wang, Xueqi Xing, Yongjie Huo, Yicheng Zhao, Yongdan Li, Hong Chen*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)
269 Downloads (Pure)

Abstract

An ionic liquid tetraethylammonium bis(trifluoromethylsulfonyl)imide (TEATFSI) is synthesized as the supporting electrolyte in an all-organic redox flow battery system with acetonitrile as the solvent. Benzophenone (BP) and 1,4-di-tert-butyl-2,5-dimethoxybenzene (DBB) are used as the redox active species. The battery exhibits a high open voltage of 2.95 V. The electrode reactions are controlled by diffusion, which is significantly influenced by the cations of the supporting electrolytes. With TEATFSI as the supporting electrolyte, the diffusion coefficients are 1.21-1.43×10-5 cm2 s-1 and 0.89-1.16×10-5 cm2 s-1 at anode and cathode, respectively. The coulombic, voltage and energy efficiencies of the battery are 97%, 46% and 44%, respectively. The battery shows a stable performance during 50 charge-discharge cycles.

Original languageEnglish
Pages (from-to)6676-6683
Number of pages8
JournalInternational Journal of Electrochemical Science
Volume13
Issue number7
DOIs
Publication statusPublished - 1 Jul 2018
MoE publication typeA1 Journal article-refereed

Keywords

  • All organic redox flow battery
  • Energy storage
  • Ionic liquid
  • Supporting electrolyte
  • Tetraethylammonium bis(trifluoromethylsulfonyl)imide

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