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Article

Enhanced Reactant Distribution in Redox Flow Cells

School of Mechanical and Manufacturing Engineering, UNSW, Sydney, NSW 2052, Australia
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Author to whom correspondence should be addressed.
Academic Editor: Amor M. Abdelkader
Molecules 2019, 24(21), 3877; https://doi.org/10.3390/molecules24213877
Received: 3 October 2019 / Revised: 23 October 2019 / Accepted: 24 October 2019 / Published: 28 October 2019
(This article belongs to the Special Issue Advances in Electrochemical Energy Storage Devices)
Redox flow batteries (RFBs), provide a safe and cost-effective means of storing energy at grid-scale, and will play an important role in the decarbonization of global electricity networks. Several approaches have been explored to improve their efficiency and power density, and recently, cell geometry modification has shown promise in efforts to address mass transport limitations which affect electrochemical and overall system performance. Flow-by electrode configurations have demonstrated significant power density improvements in laboratory testing, however, flow-through designs with conductive felt remain the standard at commercial scale. Concentration gradients exist within these cells, limiting their performance. A new concept of redistributing reactants within the flow frame is introduced in this paper. This research shows a 60% improvement in minimum V3+ concentration within simulated vanadium redox flow battery (VRB/VRFB) cells through the application of static mixers. The enhanced reactant distribution showed a cell voltage improvement by reducing concentration overpotential, suggesting a pathway forward to increase limiting current density and cycle efficiencies in RFBs. View Full-Text
Keywords: vanadium redox flow battery; power density; limiting current; cell geometry; mass transfer; electrolyte mixing; static mixer vanadium redox flow battery; power density; limiting current; cell geometry; mass transfer; electrolyte mixing; static mixer
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MDPI and ACS Style

Gurieff, N.; Keogh, D.F.; Timchenko, V.; Menictas, C. Enhanced Reactant Distribution in Redox Flow Cells. Molecules 2019, 24, 3877. https://doi.org/10.3390/molecules24213877

AMA Style

Gurieff N, Keogh DF, Timchenko V, Menictas C. Enhanced Reactant Distribution in Redox Flow Cells. Molecules. 2019; 24(21):3877. https://doi.org/10.3390/molecules24213877

Chicago/Turabian Style

Gurieff, Nicholas, Declan F. Keogh, Victoria Timchenko, and Chris Menictas. 2019. "Enhanced Reactant Distribution in Redox Flow Cells" Molecules 24, no. 21: 3877. https://doi.org/10.3390/molecules24213877

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