Abstract
The stability of vanadium flow battery (VFB) catholytes was investigated using both lightscattering measurements and visual observation. V2O5 precipitates after an induction time τ which shows an Arrhenius variation with temperature. The value of τ increases with increasing concentration of sulfate and with decreasing concentration of VV but the activation energy remains constant with a value of (1.791±0.020) eV. Plots of ln τ against [S] and [VV] show good linearity and the slopes give values of βS = 2.073 M-1 and βV5 = –3.434 M-1 for the fractional rates of variation of τ with [S] and [VV], respectively. Combining the Arrhenius Equation with the observed log-linear variation of τ with [S] and [VV] provides a model for simulating the stability of catholytes.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Z. Yang, et al., Chem. Rev., 111, 3577 (2011) and references therein
R. M. Darling et al., Energy Environ. Sci., 7, 3459 (2014) and references therein
M. L. Perry et al., J. Electrochem. Soc., 163, 1, A5064 (2016) and references therein
D. Reed et al., J. Electrochem. Soc., 163, 1, A5211 (2016)
M. Skyllas-Kazacos, et al , J. Electrochem. Soc. 158, R55 (2011)
M.J. Watt-Smith et al., J. Chem. Technol. Biotechnol. 88, 126 (2013)
A. M. Pezeshki, et al., J. Electrochem. Soc., 163 (1) A5202 (2016)
A. Bourke et al., J. Electrochem. Soc. 163, A5097 (2016)
A. Bourke et al., J. Electrochem. Soc. 162, A1547 (2015)
M. A. Miller et al., J. Electrochem. Soc. 163, A2095 (2016)
C. Petchsingh, et al., J. Electrochem. Soc. 163, A5068 (2016)
D. N. Buckley, et al., J. Electrochem. Soc., 161 A524 (2014)
S. Roe et al., J. Electrochem. Soc. 163, A5023 (2016) and references therein
D. Oboroceanu et al., J. Electrochem. Soc. 163, A2919 (2016) and references therein
L. Li et al. Adv. Energy Mater. 1, 394 (2011) and references therein
M. Vijayakumar, et al., J. Power Sources 196, 3669 (2011); 241, 173 (2013)
S. Kim et al., Phys. Chem. Chem. Phys., 13, 18186 (2011)
J. Zhang et al., J. Appl. Electrochem., 41, 1215 (2011)
S. Ahmed et al., J. Electrochem. Soc. 154, D103–D112 (2007)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Oboroceanu, D., Quill, N., Lenihan, C. et al. Measurements of VV Precipitation Times and Simulation of the Stability of Catholytes in Vanadium Flow Batteries. MRS Advances 2, 1177–1182 (2017). https://doi.org/10.1557/adv.2017.84
Published:
Issue Date:
DOI: https://doi.org/10.1557/adv.2017.84