Room temperature ionic liquid electrolytes for redox flow batteries
Redox flow batteries (RFBs) usually contain aqueous or organic electrolytes. The aim of this communication is to explore the suitability of room temperature ionic liquids (RTILs) as solvents for RFBs containing metal complexes. Towards this aim, the electrochemistry of the metal acetylacetonate (aca...
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Elsevier
2015
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| Online Access: | https://eprints.nottingham.ac.uk/37429/ |
| _version_ | 1848795456687046656 |
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| author | Ejigu, Andinet Greatorex-Davies, Peter Walsh, Darren A. |
| author_facet | Ejigu, Andinet Greatorex-Davies, Peter Walsh, Darren A. |
| author_sort | Ejigu, Andinet |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Redox flow batteries (RFBs) usually contain aqueous or organic electrolytes. The aim of this communication is to explore the suitability of room temperature ionic liquids (RTILs) as solvents for RFBs containing metal complexes. Towards this aim, the electrochemistry of the metal acetylacetonate (acac) complexes Mn(acac)3, Cr(acac)3, and V(acac)3 was studied in imidazolium-based RTILs. The V2+/V3+, V3+/V4+, and V4+/V5+ redox couples are quasi-reversible in 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide, [C2C1Im][N(Tf2)]. The Mn(acac)3 and Cr(acac)3 voltammetry, on the other hand, is irreversible in [C2C1Im][N(Tf2)] at glassy carbon (GC) but the rate of the Mn2+/Mn3+ reaction increases if Au electrodes are used. Charge–discharge measure- ments show that a coulombic efficiency of 72% is achievable using a V(acac)3/[C2C1Im][N(Tf2)]/GC cell. |
| first_indexed | 2025-11-14T19:32:23Z |
| format | Article |
| id | nottingham-37429 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:32:23Z |
| publishDate | 2015 |
| publisher | Elsevier |
| recordtype | eprints |
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| spelling | nottingham-374292020-05-04T20:08:50Z https://eprints.nottingham.ac.uk/37429/ Room temperature ionic liquid electrolytes for redox flow batteries Ejigu, Andinet Greatorex-Davies, Peter Walsh, Darren A. Redox flow batteries (RFBs) usually contain aqueous or organic electrolytes. The aim of this communication is to explore the suitability of room temperature ionic liquids (RTILs) as solvents for RFBs containing metal complexes. Towards this aim, the electrochemistry of the metal acetylacetonate (acac) complexes Mn(acac)3, Cr(acac)3, and V(acac)3 was studied in imidazolium-based RTILs. The V2+/V3+, V3+/V4+, and V4+/V5+ redox couples are quasi-reversible in 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide, [C2C1Im][N(Tf2)]. The Mn(acac)3 and Cr(acac)3 voltammetry, on the other hand, is irreversible in [C2C1Im][N(Tf2)] at glassy carbon (GC) but the rate of the Mn2+/Mn3+ reaction increases if Au electrodes are used. Charge–discharge measure- ments show that a coulombic efficiency of 72% is achievable using a V(acac)3/[C2C1Im][N(Tf2)]/GC cell. Elsevier 2015-05 Article PeerReviewed Ejigu, Andinet, Greatorex-Davies, Peter and Walsh, Darren A. (2015) Room temperature ionic liquid electrolytes for redox flow batteries. Electrochemistry Communications, 54 . pp. 55-59. ISSN 1388-2481 Ionic liquids; Energy storage; Cyclic voltammeter; Electrochemical impedance spectroscopy; Redox flow battery http://www.sciencedirect.com/science/article/pii/S1388248115000260 doi:10.1016/j.elecom.2015.01.016 doi:10.1016/j.elecom.2015.01.016 |
| spellingShingle | Ionic liquids; Energy storage; Cyclic voltammeter; Electrochemical impedance spectroscopy; Redox flow battery Ejigu, Andinet Greatorex-Davies, Peter Walsh, Darren A. Room temperature ionic liquid electrolytes for redox flow batteries |
| title | Room temperature ionic liquid electrolytes for redox flow batteries |
| title_full | Room temperature ionic liquid electrolytes for redox flow batteries |
| title_fullStr | Room temperature ionic liquid electrolytes for redox flow batteries |
| title_full_unstemmed | Room temperature ionic liquid electrolytes for redox flow batteries |
| title_short | Room temperature ionic liquid electrolytes for redox flow batteries |
| title_sort | room temperature ionic liquid electrolytes for redox flow batteries |
| topic | Ionic liquids; Energy storage; Cyclic voltammeter; Electrochemical impedance spectroscopy; Redox flow battery |
| url | https://eprints.nottingham.ac.uk/37429/ https://eprints.nottingham.ac.uk/37429/ https://eprints.nottingham.ac.uk/37429/ |