Investigation of reactant conversion in the vanadium redox flow battery using spatially resolved state of charge mapping
Segmented cells enable real time visualization of the flow distribution in vanadium redox flow batteries by local current or voltage mapping. The lateral flow of current within thick porous electrodes, however, impairs the local resolution of the detected signals. In this study, the open circuit vol...
| Main Authors: | , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2019
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/106324 http://hdl.handle.net/10220/49605 |
| _version_ | 1811696355713744896 |
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| author | Bhattarai, Arjun Schweiss, Rüdiger Ghimire, Purna Chandra Lim, Tuti Mariana Scherer, Günther G. Wai, Nyunt Yan, Qingyu |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Bhattarai, Arjun Schweiss, Rüdiger Ghimire, Purna Chandra Lim, Tuti Mariana Scherer, Günther G. Wai, Nyunt Yan, Qingyu |
| author_sort | Bhattarai, Arjun |
| collection | NTU |
| description | Segmented cells enable real time visualization of the flow distribution in vanadium redox flow batteries by local current or voltage mapping. The lateral flow of current within thick porous electrodes, however, impairs the local resolution of the detected signals. In this study, the open circuit voltage immediately after the cessation of charge/discharge is used for the mapping of reactant conversion. This quantity is not hampered by lateral flow of current and can be conveniently transformed to the corresponding state of charge. The difference between theoretically calculated and experimentally determined conversion (change in the state of charge) across the electrode is used to determine local variations in conversion efficiency. The method is validated by systematic experiments using electrodes with different modifications, varying current densities and flow configurations. The procedure and the interpretation are simple and scalable to any size of flow cell. |
| first_indexed | 2024-10-01T07:38:03Z |
| format | Journal Article |
| id | ntu-10356/106324 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T07:38:03Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | ntu-10356/1063242021-01-08T02:44:25Z Investigation of reactant conversion in the vanadium redox flow battery using spatially resolved state of charge mapping Bhattarai, Arjun Schweiss, Rüdiger Ghimire, Purna Chandra Lim, Tuti Mariana Scherer, Günther G. Wai, Nyunt Yan, Qingyu School of Civil and Environmental Engineering School of Materials Science & Engineering Interdisciplinary Graduate School (IGS) Energy Research Institute @ NTU (ERI@N) Current Distribution Redox Flow Batteries Engineering::Materials Segmented cells enable real time visualization of the flow distribution in vanadium redox flow batteries by local current or voltage mapping. The lateral flow of current within thick porous electrodes, however, impairs the local resolution of the detected signals. In this study, the open circuit voltage immediately after the cessation of charge/discharge is used for the mapping of reactant conversion. This quantity is not hampered by lateral flow of current and can be conveniently transformed to the corresponding state of charge. The difference between theoretically calculated and experimentally determined conversion (change in the state of charge) across the electrode is used to determine local variations in conversion efficiency. The method is validated by systematic experiments using electrodes with different modifications, varying current densities and flow configurations. The procedure and the interpretation are simple and scalable to any size of flow cell. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) Published version 2019-08-13T04:52:52Z 2019-12-06T22:09:09Z 2019-08-13T04:52:52Z 2019-12-06T22:09:09Z 2019 Journal Article Ghimire, P. C., Bhattarai, A., Schweiss, R., Scherer, G. G., Wai, N., Lim, T. M., & Yan, Q. (2019). Investigation of reactant conversion in the vanadium redox flow battery using spatially resolved state of charge mapping. Batteries, 5(1), 2-. doi:10.3390/batteries5010002 2313-0105 https://hdl.handle.net/10356/106324 http://hdl.handle.net/10220/49605 10.3390/batteries5010002 en Batteries © 2019 by the Authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). 11 p. application/pdf |
| spellingShingle | Current Distribution Redox Flow Batteries Engineering::Materials Bhattarai, Arjun Schweiss, Rüdiger Ghimire, Purna Chandra Lim, Tuti Mariana Scherer, Günther G. Wai, Nyunt Yan, Qingyu Investigation of reactant conversion in the vanadium redox flow battery using spatially resolved state of charge mapping |
| title | Investigation of reactant conversion in the vanadium redox flow battery using spatially resolved state of charge mapping |
| title_full | Investigation of reactant conversion in the vanadium redox flow battery using spatially resolved state of charge mapping |
| title_fullStr | Investigation of reactant conversion in the vanadium redox flow battery using spatially resolved state of charge mapping |
| title_full_unstemmed | Investigation of reactant conversion in the vanadium redox flow battery using spatially resolved state of charge mapping |
| title_short | Investigation of reactant conversion in the vanadium redox flow battery using spatially resolved state of charge mapping |
| title_sort | investigation of reactant conversion in the vanadium redox flow battery using spatially resolved state of charge mapping |
| topic | Current Distribution Redox Flow Batteries Engineering::Materials |
| url | https://hdl.handle.net/10356/106324 http://hdl.handle.net/10220/49605 |
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