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Effect of electrode intrusion on pressure drop and electrochemical performance of an all-vanadium redox flow battery
Shyam G.Ravi Kumar,
Published in Elsevier B.V.
2017
Volume: 360
   
Pages: 548 - 558
Abstract
In this paper, we present a study of the effect of electrode intrusion into the flow channel in an all-vanadium redox flow battery. Permeability, pressure drop and electrochemical performance have been measured in a cell with active area 100 cm2and 414 cm2 fitted with a carbon felt electrode of thickness of 3, 6 or 9 mm compressed to 1.5, 2.5 or 4 mm, respectively, during assembly. Results show that the pressure drop is significantly higher than what can be expected in the thick electrode case while its electrochemical performance is lower. Detailed flow analysis using computational fluid dynamics simulations in two different flow fields shows that both these results can be attributed to electrode intrusion into the flow channel leading to increased resistance to electrolyte flow through the electrode. A correlation is proposed to evaluate electrode intrusion depth as a function of compression. © 2017 Elsevier B.V.
About the journal
JournalData powered by TypesetJournal of Power Sources
PublisherData powered by TypesetElsevier B.V.
ISSN03787753
Open AccessNo
Concepts (21)
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    Carbon
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    Channel flow
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    Computational fluid dynamics
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    Drops
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    Electric batteries
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    Electrodes
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    Electrolytes
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    FLOW BATTERIES
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    Flow fields
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    Mercury (metal)
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    Pressure drop
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    Vanadium
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    ALL VANADIUM REDOX FLOW BATTERY
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    Computational fluid dynamics simulations
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    Electrochemical performance
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    ELECTROLYTE CIRCULATIONS
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    ELECTROLYTE FLOWS
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    Power densities
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    THICK ELECTRODES
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    VANADIUM REDOX FLOW BATTERIES
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    Electrochemical electrodes