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Communication-observation of arrhenius behavior of catholyte stability in vanadium flow batteries

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Date
2016
Abstract
The stability of typical vanadium flowbattery (VFB) catholytes with respect to precipitation of V2O5 was investigated at temperatures in the range 30–60◦C. In all cases a precipitate formed after an induction time, which decreased with increasing temperature and concentration of VV and increased with concentration of sulfate. Arrhenius-type plots are shown for two typical solutions. These have excellent linearity and have similar slopes which yield an apparent activation energy of 1.79 eV (172 kJ mol−1). The variation of induction time with temperature for various concentrations of VV was simulated, and stability diagrams for additive-free VFB catholytes were generated.
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Description
peer-reviewed
Publisher
Electrochemical Society
Citation
Journal of the Electrochemical Society;163 (14), pp. A2919-A2921
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Physics
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Oboroceanu_2016_Communication.pdf
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Keywords
CARBON, electrode-kinetics, cell electrolyte, carbon
ULRR Identifiers
https://hdl.handle.net/10344/6274
 https://doi.org/10.34961/10064
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Funding Information
Sustainable Development Goals
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