Investigation of ammonium- And phosphonium-based deep eutectic solvents as electrolytes for a non-aqueous all-vanadium redox cell

L. Bahadori, M. A. Hashim, N. S A Manan, F. S. Mjalli, I. M. Alnashef, N. P. Brandon, M. H. Chakrabarti

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The charge/discharge characteristics for vanadium acetylacetonate in deep eutectic solvents were evaluated using an H-cell with an anion-exchange membrane separator for the first time. Coulombic (CE) and energy efficiencies (EE) of the electrolyte containing V(acac)3/0.5 M TEABF4 in DES3 (a hydrogen bonded eutectic between choline chloride and ethylene glycol) were obtained as 49-52% and 25-31%, respectively, when charging from 0 to 50% of theoretical maximum state-of-charge for 12 cycles. The low CE may be due to the crossover of the active species through the separator, or to the loss of active vanadium due to a parasitic reaction. However, the CE was similar to that for acetonitrile (CH3CN) indicating the promise of DESs as suitable electrolytes for future evaluation. Charge and discharge voltages are respectively higher and lower than the formal cell potential obtained by voltammetry. Ohmic drop in the DES results from the low conductivity of the electrolyte and the relatively large distance between the two electrodes in the H-cell. Further studies require investigation in a flow cell with analyses of polarization curves and impedance to determine the loss mechanisms in sufficient detail.

Original languageEnglish
Pages (from-to)A632-A638
JournalJournal of the Electrochemical Society
Volume163
Issue number5
DOIs
Publication statusPublished - 2016

Fingerprint

Redox cells
Vanadium
Ammonium Compounds
eutectics
Eutectics
vanadium
Electrolytes
electrolytes
Separators
separators
cells
Ethylene Glycol
Voltammetry
Choline
Ethylene glycol
Acetonitrile
choline
low conductivity
Anions
Energy efficiency

ASJC Scopus subject areas

  • Electrochemistry
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics

Cite this

Investigation of ammonium- And phosphonium-based deep eutectic solvents as electrolytes for a non-aqueous all-vanadium redox cell. / Bahadori, L.; Hashim, M. A.; Manan, N. S A; Mjalli, F. S.; Alnashef, I. M.; Brandon, N. P.; Chakrabarti, M. H.

In: Journal of the Electrochemical Society, Vol. 163, No. 5, 2016, p. A632-A638.

Research output: Contribution to journalArticle

Bahadori, L. ; Hashim, M. A. ; Manan, N. S A ; Mjalli, F. S. ; Alnashef, I. M. ; Brandon, N. P. ; Chakrabarti, M. H. / Investigation of ammonium- And phosphonium-based deep eutectic solvents as electrolytes for a non-aqueous all-vanadium redox cell. In: Journal of the Electrochemical Society. 2016 ; Vol. 163, No. 5. pp. A632-A638.
@article{f6502c91e08e4e26b5cb74bf3eadb61d,
title = "Investigation of ammonium- And phosphonium-based deep eutectic solvents as electrolytes for a non-aqueous all-vanadium redox cell",
abstract = "The charge/discharge characteristics for vanadium acetylacetonate in deep eutectic solvents were evaluated using an H-cell with an anion-exchange membrane separator for the first time. Coulombic (CE) and energy efficiencies (EE) of the electrolyte containing V(acac)3/0.5 M TEABF4 in DES3 (a hydrogen bonded eutectic between choline chloride and ethylene glycol) were obtained as 49-52{\%} and 25-31{\%}, respectively, when charging from 0 to 50{\%} of theoretical maximum state-of-charge for 12 cycles. The low CE may be due to the crossover of the active species through the separator, or to the loss of active vanadium due to a parasitic reaction. However, the CE was similar to that for acetonitrile (CH3CN) indicating the promise of DESs as suitable electrolytes for future evaluation. Charge and discharge voltages are respectively higher and lower than the formal cell potential obtained by voltammetry. Ohmic drop in the DES results from the low conductivity of the electrolyte and the relatively large distance between the two electrodes in the H-cell. Further studies require investigation in a flow cell with analyses of polarization curves and impedance to determine the loss mechanisms in sufficient detail.",
author = "L. Bahadori and Hashim, {M. A.} and Manan, {N. S A} and Mjalli, {F. S.} and Alnashef, {I. M.} and Brandon, {N. P.} and Chakrabarti, {M. H.}",
year = "2016",
doi = "10.1149/2.0261605jes",
language = "English",
volume = "163",
pages = "A632--A638",
journal = "Journal of the Electrochemical Society",
issn = "0013-4651",
publisher = "Electrochemical Society, Inc.",
number = "5",

}

TY - JOUR

T1 - Investigation of ammonium- And phosphonium-based deep eutectic solvents as electrolytes for a non-aqueous all-vanadium redox cell

AU - Bahadori, L.

AU - Hashim, M. A.

AU - Manan, N. S A

AU - Mjalli, F. S.

AU - Alnashef, I. M.

AU - Brandon, N. P.

AU - Chakrabarti, M. H.

PY - 2016

Y1 - 2016

N2 - The charge/discharge characteristics for vanadium acetylacetonate in deep eutectic solvents were evaluated using an H-cell with an anion-exchange membrane separator for the first time. Coulombic (CE) and energy efficiencies (EE) of the electrolyte containing V(acac)3/0.5 M TEABF4 in DES3 (a hydrogen bonded eutectic between choline chloride and ethylene glycol) were obtained as 49-52% and 25-31%, respectively, when charging from 0 to 50% of theoretical maximum state-of-charge for 12 cycles. The low CE may be due to the crossover of the active species through the separator, or to the loss of active vanadium due to a parasitic reaction. However, the CE was similar to that for acetonitrile (CH3CN) indicating the promise of DESs as suitable electrolytes for future evaluation. Charge and discharge voltages are respectively higher and lower than the formal cell potential obtained by voltammetry. Ohmic drop in the DES results from the low conductivity of the electrolyte and the relatively large distance between the two electrodes in the H-cell. Further studies require investigation in a flow cell with analyses of polarization curves and impedance to determine the loss mechanisms in sufficient detail.

AB - The charge/discharge characteristics for vanadium acetylacetonate in deep eutectic solvents were evaluated using an H-cell with an anion-exchange membrane separator for the first time. Coulombic (CE) and energy efficiencies (EE) of the electrolyte containing V(acac)3/0.5 M TEABF4 in DES3 (a hydrogen bonded eutectic between choline chloride and ethylene glycol) were obtained as 49-52% and 25-31%, respectively, when charging from 0 to 50% of theoretical maximum state-of-charge for 12 cycles. The low CE may be due to the crossover of the active species through the separator, or to the loss of active vanadium due to a parasitic reaction. However, the CE was similar to that for acetonitrile (CH3CN) indicating the promise of DESs as suitable electrolytes for future evaluation. Charge and discharge voltages are respectively higher and lower than the formal cell potential obtained by voltammetry. Ohmic drop in the DES results from the low conductivity of the electrolyte and the relatively large distance between the two electrodes in the H-cell. Further studies require investigation in a flow cell with analyses of polarization curves and impedance to determine the loss mechanisms in sufficient detail.

UR - http://www.scopus.com/inward/record.url?scp=84955482872&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84955482872&partnerID=8YFLogxK

U2 - 10.1149/2.0261605jes

DO - 10.1149/2.0261605jes

M3 - Article

VL - 163

SP - A632-A638

JO - Journal of the Electrochemical Society

JF - Journal of the Electrochemical Society

SN - 0013-4651

IS - 5

ER -