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Communication-observation of arrhenius behavior of catholyte stability in vanadium flow batteries
Oboroceanu, Daniela; Quill, Nathan; Lenihan, Catherine; Ní Eidhin, Deirdre; Albu, Sergiu P.; Lynch, Robert P.; Buckley, Noel
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. PUBLISHED peer-reviewed
Keyword(s): CARBON; electrode-kinetics; cell electrolyte; carbon
Publication Date:
2016
Type: Journal article
Peer-Reviewed: Yes
Language(s): English
Institution: University of Limerick
Citation(s): Journal of the Electrochemical Society;163 (14), pp. A2919-A2921
Publisher(s): Electrochemical Society
First Indexed: 2017-11-20 06:25:04 Last Updated: 2017-11-20 06:25:04