A1 Refereed original research article in a scientific journal
Experimental Set-Up for Measurement of Half-Cell- and Over-Potentials of Flow Batteries During Operation
Authors: Gonzalez, Gabriel Adelqui; Peljo, Pekka
Publisher: Wiley-VCH Verlag GmbH & Co. KGaA
Publication year: 2024
Journal: Batteries & Supercaps
Journal name in source: Batteries & Supercaps
Article number: e202400394
eISSN: 2566-6223
DOI: https://doi.org/10.1002/batt.202400394
Web address : https://doi.org/10.1002/batt.202400394
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/458600997
The study of flow batteries (FBs) requires the development of tools able to evaluate their performance during operation in a reliable and simple way. In this work, we present an experimental set-up that allows the on-line monitoring of the half-cells state of charge and apparent overpotentials on the positive and negative electrodes during battery operation. These measurements are feasible by using additional flow cells that include a reference electrode on each side. We used the experimental set-up to study the performance of the vanadium system as well as a previously reported stable organic couple. The studies consisted on short cycling operation at different current densities and polarization curves at different flow rates and states of charge. By confirming previous results obtained for vanadium-FBs and extending the analysis to further systems, we demonstrated that this approach provides a reliable deeper insight into the battery performance and the processes taking place during operation.
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Funding information in the publication:
We would like to acknowledge the funding received from theEuropean Union's Horizon2020 Research and Innovationprogramme under grant agreement No 875565 (ProjectCompBat). G.G. gratefully acknowledges the financial supportfrom the University of Turku Graduate School. P.P. gratefullyacknowledges the Academy Research Fellow funding (grant no.315739, 343791, 320071, and 343794) from Research CouncilFinland, and European Research Council through a Starting grant(agreement no. 950038). Materials Analysis and ResearchInfrastructure (MARI) of the University of Turku was utilized in thiswork.
