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

Yihan Zhen; Cuijuan Zhang; Jiashu Yuan; Yicheng Zhao; Yongdan Li

doi:10.1016/j.jpowsour.2019.227331

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 journal › Article › Scientific › peer-review

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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 language	English
Article number	227331
Number of pages	8
Journal	Journal of Power Sources
Volume	445
DOIs	https://doi.org/10.1016/j.jpowsour.2019.227331
Publication status	Published - 1 Jan 2020
MoE publication type	A1 Journal article-refereed

Keywords

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

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.jpowsour.2019.227331

CHEM_Zhen_et_al_A_high-performance_all-iron_2020_Journal_of_Power_SourcesAccepted author manuscript, 786 KBLicence: CC BY-NC-ND

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title = "A high-performance all-iron non-aqueous redox flow battery",

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.",

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

author = "Yihan Zhen and Cuijuan Zhang and Jiashu Yuan and Yicheng Zhao and Yongdan Li",

year = "2020",

month = jan,

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doi = "10.1016/j.jpowsour.2019.227331",

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T1 - A high-performance all-iron non-aqueous redox flow battery

AU - Zhen, Yihan

AU - Zhang, Cuijuan

AU - Yuan, Jiashu

AU - Zhao, Yicheng

AU - Li, Yongdan

PY - 2020/1/1

Y1 - 2020/1/1

N2 - 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.

AB - 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.

KW - Electrochemical energy storage

KW - Non-aqueous electrolyte

KW - Organometallic materials

KW - Redox flow battery

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M3 - Article

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VL - 445

JO - Journal of Power Sources

JF - Journal of Power Sources

M1 - 227331

ER -

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

Abstract

Keywords

UN SDGs

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