Evaluation of ionic liquids as electrolytes for vanadium redox flow batteries

L. Bahadori; R. Boyd; A. Warrington; M. S. Shafeeyan; P. Nockemann

doi:10.1016/j.molliq.2020.114017

Evaluation of ionic liquids as electrolytes for vanadium redox flow batteries

L. Bahadori^*, R. Boyd, A. Warrington, M. S. Shafeeyan, P. Nockemann

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

Non-aqueous redox flow batteries (NARFBs) are promising electrochemical energy storage devices due to their wide electrochemical potential windows, generally >2 V of organic solvents. This study aims to investigate the suitability of ionic liquids (ILs) as electrolytes for NARFBs containing a vanadium metal complex. The electrochemistry of a single-component NARFBs employing vanadium (III) acetylacetonate (V(acac)₃) was studied in 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [C₄mim][NTF₂], and 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide, [C₄mpyr][NTF₂], electrolytes. The electrochemical kinetics of the anodic and cathodic reactions was measured using cyclic voltammetry. The V^II/V^III and V^III/V^IV couples were quasi-reversible and together yielded a cell potential of 2.2 V in both ILs. Charge/discharge characteristics show that a coulombic efficiency for cycles 1–50 ranged from 88 to 92% using a V(acac)₃/[C₄mpyr][NTF₂] cell.

Original language	English
Article number	114017
Number of pages	6
Journal	Journal of Molecular Liquids
Volume	317
Early online date	10 Aug 2020
DOIs	https://doi.org/10.1016/j.molliq.2020.114017
Publication status	Published - 01 Nov 2020

Keywords

All-vanadium electrolyte
Electrochemistry
Ionic liquid
Non-aqueous electrolytes
Redox flow battery

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Spectroscopy
Physical and Theoretical Chemistry
Materials Chemistry

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title = "Evaluation of ionic liquids as electrolytes for vanadium redox flow batteries",

abstract = "Non-aqueous redox flow batteries (NARFBs) are promising electrochemical energy storage devices due to their wide electrochemical potential windows, generally >2 V of organic solvents. This study aims to investigate the suitability of ionic liquids (ILs) as electrolytes for NARFBs containing a vanadium metal complex. The electrochemistry of a single-component NARFBs employing vanadium (III) acetylacetonate (V(acac)3) was studied in 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [C4mim][NTF2], and 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide, [C4mpyr][NTF2], electrolytes. The electrochemical kinetics of the anodic and cathodic reactions was measured using cyclic voltammetry. The VII/VIII and VIII/VIV couples were quasi-reversible and together yielded a cell potential of 2.2 V in both ILs. Charge/discharge characteristics show that a coulombic efficiency for cycles 1–50 ranged from 88 to 92% using a V(acac)3/[C4mpyr][NTF2] cell.",

keywords = "All-vanadium electrolyte, Electrochemistry, Ionic liquid, Non-aqueous electrolytes, Redox flow battery",

author = "L. Bahadori and R. Boyd and A. Warrington and Shafeeyan, {M. S.} and P. Nockemann",

year = "2020",

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doi = "10.1016/j.molliq.2020.114017",

language = "English",

volume = "317",

journal = "Journal of Molecular Liquids",

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T1 - Evaluation of ionic liquids as electrolytes for vanadium redox flow batteries

AU - Bahadori, L.

AU - Boyd, R.

AU - Warrington, A.

AU - Shafeeyan, M. S.

AU - Nockemann, P.

PY - 2020/11/1

Y1 - 2020/11/1

N2 - Non-aqueous redox flow batteries (NARFBs) are promising electrochemical energy storage devices due to their wide electrochemical potential windows, generally >2 V of organic solvents. This study aims to investigate the suitability of ionic liquids (ILs) as electrolytes for NARFBs containing a vanadium metal complex. The electrochemistry of a single-component NARFBs employing vanadium (III) acetylacetonate (V(acac)3) was studied in 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [C4mim][NTF2], and 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide, [C4mpyr][NTF2], electrolytes. The electrochemical kinetics of the anodic and cathodic reactions was measured using cyclic voltammetry. The VII/VIII and VIII/VIV couples were quasi-reversible and together yielded a cell potential of 2.2 V in both ILs. Charge/discharge characteristics show that a coulombic efficiency for cycles 1–50 ranged from 88 to 92% using a V(acac)3/[C4mpyr][NTF2] cell.

AB - Non-aqueous redox flow batteries (NARFBs) are promising electrochemical energy storage devices due to their wide electrochemical potential windows, generally >2 V of organic solvents. This study aims to investigate the suitability of ionic liquids (ILs) as electrolytes for NARFBs containing a vanadium metal complex. The electrochemistry of a single-component NARFBs employing vanadium (III) acetylacetonate (V(acac)3) was studied in 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [C4mim][NTF2], and 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide, [C4mpyr][NTF2], electrolytes. The electrochemical kinetics of the anodic and cathodic reactions was measured using cyclic voltammetry. The VII/VIII and VIII/VIV couples were quasi-reversible and together yielded a cell potential of 2.2 V in both ILs. Charge/discharge characteristics show that a coulombic efficiency for cycles 1–50 ranged from 88 to 92% using a V(acac)3/[C4mpyr][NTF2] cell.

KW - All-vanadium electrolyte

KW - Electrochemistry

KW - Ionic liquid

KW - Non-aqueous electrolytes

KW - Redox flow battery

U2 - 10.1016/j.molliq.2020.114017

DO - 10.1016/j.molliq.2020.114017

M3 - Article

AN - SCOPUS:85089479518

SN - 0167-7322

VL - 317

JO - Journal of Molecular Liquids

JF - Journal of Molecular Liquids

M1 - 114017

ER -

Evaluation of ionic liquids as electrolytes for vanadium redox flow batteries

Abstract

Keywords

ASJC Scopus subject areas

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