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

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date

2020-01-01

Department

Department of Chemical and Metallurgical Engineering

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Language

en

Pages

8

Series

Journal of Power Sources, Volume 445

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.

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Keywords

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

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DOI

10.1016/j.jpowsour.2019.227331

Citation

Zhen, Y, Zhang, C, Yuan, J, Zhao, Y & Li, Y 2020, 'A high-performance all-iron non-aqueous redox flow battery', Journal of Power Sources, vol. 445, 227331. https://doi.org/10.1016/j.jpowsour.2019.227331

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https://urn.fi/URN:NBN:fi:aalto-202105126662

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[article-cris] Kemian tekniikan korkeakoulu / CHEM