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Title: Investigation of reactant conversion in the vanadium redox flow battery using spatially resolved state of charge mapping
Authors: Bhattarai, Arjun
Schweiss, Rüdiger
Ghimire, Purna Chandra
Lim, Tuti Mariana
Scherer, Günther G.
Wai, Nyunt
Yan, Qingyu
Keywords: Current Distribution
Redox Flow Batteries
Issue Date: 2019
Source: 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
Series/Report no.: Batteries
Abstract: 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.
ISSN: 2313-0105
DOI: 10.3390/batteries5010002
Rights: © 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 (
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:ERI@N Journal Articles


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