Current Distribution in the Discharge Unit of a 10-Cell Vanadium Redox Flow Battery: Comparison of the Computational Model with Experiment
Shunting currents are among the main problems of all-vanadium redox flow battery stacks since, in addition to capacity losses, they cause negative effects associated with the local destruction of electrodes and bipolar plates. The values of both the shunting currents and their destructive effects on...
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| Format: | Article |
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MDPI AG
2022-11-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/12/11/1167 |
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| author | Artem Glazkov Roman Pichugov Pavel Loktionov Dmitry Konev Dmitry Tolstel Mikhail Petrov Anatoly Antipov Mikhail A. Vorotyntsev |
| author_facet | Artem Glazkov Roman Pichugov Pavel Loktionov Dmitry Konev Dmitry Tolstel Mikhail Petrov Anatoly Antipov Mikhail A. Vorotyntsev |
| author_sort | Artem Glazkov |
| collection | DOAJ |
| description | Shunting currents are among the main problems of all-vanadium redox flow battery stacks since, in addition to capacity losses, they cause negative effects associated with the local destruction of electrodes and bipolar plates. The values of both the shunting currents and their destructive effects on materials can be reduced at the battery development stage by adjusting the resistance of the electrolyte supply channels. The solution to this problem can be found using a calculation model for current distribution based on the current balance in the nodes as well as voltage drops and electromotive force in internal circuits according to Kirchhoff’s laws. This paper presents the verification of the model of current distribution in an all-vanadium redox flow battery stack of an original design that allows for the determination of membrane-electrode assembly resistances and electrolyte supply channels via direct measurements. Based on a comparison of the calculated and experimental values of the coulombic efficiency of charge–discharge cycles, the capacity fade associated with the crossover of vanadium compounds through the membrane has been determined. |
| first_indexed | 2024-03-09T18:08:49Z |
| format | Article |
| id | doaj.art-54b4266d9c84442e9c33f06c37bd54ae |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-09T18:08:49Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-54b4266d9c84442e9c33f06c37bd54ae2023-11-24T09:12:52ZengMDPI AGMembranes2077-03752022-11-011211116710.3390/membranes12111167Current Distribution in the Discharge Unit of a 10-Cell Vanadium Redox Flow Battery: Comparison of the Computational Model with ExperimentArtem Glazkov0Roman Pichugov1Pavel Loktionov2Dmitry Konev3Dmitry Tolstel4Mikhail Petrov5Anatoly Antipov6Mikhail A. Vorotyntsev7EMCPS Department, Mendeleev University of Chemical Technology of Russia, 125047 Moscow, RussiaEMCPS Department, Mendeleev University of Chemical Technology of Russia, 125047 Moscow, RussiaEMCPS Department, Mendeleev University of Chemical Technology of Russia, 125047 Moscow, RussiaEMCPS Department, Mendeleev University of Chemical Technology of Russia, 125047 Moscow, RussiaFrumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 119071 Moscow, RussiaEMCPS Department, Mendeleev University of Chemical Technology of Russia, 125047 Moscow, RussiaEMCPS Department, Mendeleev University of Chemical Technology of Russia, 125047 Moscow, RussiaFrumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 119071 Moscow, RussiaShunting currents are among the main problems of all-vanadium redox flow battery stacks since, in addition to capacity losses, they cause negative effects associated with the local destruction of electrodes and bipolar plates. The values of both the shunting currents and their destructive effects on materials can be reduced at the battery development stage by adjusting the resistance of the electrolyte supply channels. The solution to this problem can be found using a calculation model for current distribution based on the current balance in the nodes as well as voltage drops and electromotive force in internal circuits according to Kirchhoff’s laws. This paper presents the verification of the model of current distribution in an all-vanadium redox flow battery stack of an original design that allows for the determination of membrane-electrode assembly resistances and electrolyte supply channels via direct measurements. Based on a comparison of the calculated and experimental values of the coulombic efficiency of charge–discharge cycles, the capacity fade associated with the crossover of vanadium compounds through the membrane has been determined.https://www.mdpi.com/2077-0375/12/11/1167redox flow batteriesall-vanadium redox flow batterymembrane-electrode assemblyshunting currentsvanadium stackdestructive effect |
| spellingShingle | Artem Glazkov Roman Pichugov Pavel Loktionov Dmitry Konev Dmitry Tolstel Mikhail Petrov Anatoly Antipov Mikhail A. Vorotyntsev Current Distribution in the Discharge Unit of a 10-Cell Vanadium Redox Flow Battery: Comparison of the Computational Model with Experiment Membranes redox flow batteries all-vanadium redox flow battery membrane-electrode assembly shunting currents vanadium stack destructive effect |
| title | Current Distribution in the Discharge Unit of a 10-Cell Vanadium Redox Flow Battery: Comparison of the Computational Model with Experiment |
| title_full | Current Distribution in the Discharge Unit of a 10-Cell Vanadium Redox Flow Battery: Comparison of the Computational Model with Experiment |
| title_fullStr | Current Distribution in the Discharge Unit of a 10-Cell Vanadium Redox Flow Battery: Comparison of the Computational Model with Experiment |
| title_full_unstemmed | Current Distribution in the Discharge Unit of a 10-Cell Vanadium Redox Flow Battery: Comparison of the Computational Model with Experiment |
| title_short | Current Distribution in the Discharge Unit of a 10-Cell Vanadium Redox Flow Battery: Comparison of the Computational Model with Experiment |
| title_sort | current distribution in the discharge unit of a 10 cell vanadium redox flow battery comparison of the computational model with experiment |
| topic | redox flow batteries all-vanadium redox flow battery membrane-electrode assembly shunting currents vanadium stack destructive effect |
| url | https://www.mdpi.com/2077-0375/12/11/1167 |
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