Systematic selection of solvent mixtures for non-aqueous redox flow batteries – vanadium acetylacetonate as a model system
Employing solvent mixtures in the electrolyte of non-aqueous redox flow batteries can increase energy density and efficiency. In this paper, active species solubility, electrolyte conductivity, and redox reaction rates were examined systematically among a number of binary and ternary mixtures, consi...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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Elsevier
2019
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| Online Access: | http://hdl.handle.net/1721.1/120072 https://orcid.org/0000-0001-7840-6682 |
| _version_ | 1826197902668595200 |
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| author | Bamgbopa, Musbaudeen O. Pour, Nir Shao-Horn, Yang Matar, Saif Saeed |
| author2 | Massachusetts Institute of Technology. Department of Materials Science and Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Materials Science and Engineering Bamgbopa, Musbaudeen O. Pour, Nir Shao-Horn, Yang Matar, Saif Saeed |
| author_sort | Bamgbopa, Musbaudeen O. |
| collection | MIT |
| description | Employing solvent mixtures in the electrolyte of non-aqueous redox flow batteries can increase energy density and efficiency. In this paper, active species solubility, electrolyte conductivity, and redox reaction rates were examined systematically among a number of binary and ternary mixtures, consisting of acetonitrile and 5 polar aprotic co-solvents to identify mixtures with enhanced active species solubility and redox reaction rates. Although we used vanadium acetylacetonate as a model, the methodologies presented here are applicable when evaluating solvent mixtures for other active species. Our approach is distinctive in that it elucidated the trade-offs in desirable properties that are necessary when solvent mixtures are used for non-aqueous redox flow batteries. We found that in a vanadium acetylacetonate–based non-aqueous redox flow battery, the use of an 84/16 vol% acetonitrile/1,3-dioxolane binary solvent mixture resulted in an increase in the positive and negative sides reaction rates compared to that observed with pure acetonitrile. This binary mixture resulted in an improvement in reaction rate with no decrease in energy density and is a promising solvent system for other active species used for non-aqueous flow batteries. Keywords: Vanadium acetylacetonate; Non-aqueous electrolyte; Redox flow battery; Organic electrochemistry; Energy Storage |
| first_indexed | 2024-09-23T10:55:23Z |
| format | Article |
| id | mit-1721.1/120072 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:55:23Z |
| publishDate | 2019 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | mit-1721.1/1200722019-05-17T08:57:52Z Systematic selection of solvent mixtures for non-aqueous redox flow batteries – vanadium acetylacetonate as a model system Bamgbopa, Musbaudeen O. Pour, Nir Shao-Horn, Yang Matar, Saif Saeed Massachusetts Institute of Technology. Department of Materials Science and Engineering Shao-Horn, Yang Pour, Nir Shao-Horn, Yang Matar, Saif Saeed Employing solvent mixtures in the electrolyte of non-aqueous redox flow batteries can increase energy density and efficiency. In this paper, active species solubility, electrolyte conductivity, and redox reaction rates were examined systematically among a number of binary and ternary mixtures, consisting of acetonitrile and 5 polar aprotic co-solvents to identify mixtures with enhanced active species solubility and redox reaction rates. Although we used vanadium acetylacetonate as a model, the methodologies presented here are applicable when evaluating solvent mixtures for other active species. Our approach is distinctive in that it elucidated the trade-offs in desirable properties that are necessary when solvent mixtures are used for non-aqueous redox flow batteries. We found that in a vanadium acetylacetonate–based non-aqueous redox flow battery, the use of an 84/16 vol% acetonitrile/1,3-dioxolane binary solvent mixture resulted in an increase in the positive and negative sides reaction rates compared to that observed with pure acetonitrile. This binary mixture resulted in an improvement in reaction rate with no decrease in energy density and is a promising solvent system for other active species used for non-aqueous flow batteries. Keywords: Vanadium acetylacetonate; Non-aqueous electrolyte; Redox flow battery; Organic electrochemistry; Energy Storage 2019-01-15T19:04:11Z 2019-01-15T19:04:11Z 2016-12 2016-12 Article http://purl.org/eprint/type/JournalArticle 0013-4686 0019-4686 http://hdl.handle.net/1721.1/120072 Bamgbopa, Musbaudeen O. et al. “Systematic Selection of Solvent Mixtures for Non-Aqueous Redox Flow Batteries – Vanadium Acetylacetonate as a Model System.” Electrochimica Acta 223 (January 2017): 115–123 © 2016 Elsevier Ltd PUBLISHER_CC https://orcid.org/0000-0001-7840-6682 en_US http://dx.doi.org/10.1016/j.electacta.2016.12.014 Electrochimica Acta Creative Commons Attribution-NonCommercial-NoDerivs License http://creativecommons.org/licenses/by-nc-nd/4.0/ application/octet-stream Elsevier Prof. Shao-Horn via Angie Locknar |
| spellingShingle | Bamgbopa, Musbaudeen O. Pour, Nir Shao-Horn, Yang Matar, Saif Saeed Systematic selection of solvent mixtures for non-aqueous redox flow batteries – vanadium acetylacetonate as a model system |
| title | Systematic selection of solvent mixtures for non-aqueous redox flow batteries – vanadium acetylacetonate as a model system |
| title_full | Systematic selection of solvent mixtures for non-aqueous redox flow batteries – vanadium acetylacetonate as a model system |
| title_fullStr | Systematic selection of solvent mixtures for non-aqueous redox flow batteries – vanadium acetylacetonate as a model system |
| title_full_unstemmed | Systematic selection of solvent mixtures for non-aqueous redox flow batteries – vanadium acetylacetonate as a model system |
| title_short | Systematic selection of solvent mixtures for non-aqueous redox flow batteries – vanadium acetylacetonate as a model system |
| title_sort | systematic selection of solvent mixtures for non aqueous redox flow batteries vanadium acetylacetonate as a model system |
| url | http://hdl.handle.net/1721.1/120072 https://orcid.org/0000-0001-7840-6682 |
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