Publication Type:

Journal Article

Source:

Journal of Power Sources, Elsevier B.V., p.536-544 (2019)

URL:

https://www.scopus.com/inward/record.uri?eid=2-s2.0-85057523649&doi=10.1016%2fj.jpowsour.2018.11.070&partnerID=40&md5=107ee93986aa09f0dc7f0dc52a96fe8b

Keywords:

Battery performance, Charge-discharge characteristics, Electric discharges, Electrode kinetics, Electrodes, Electrolyte flow rates, Electrolytes, Flow batteries, Forced convection, Limiting current density, Modelling and simulations, Natural convection, Simultaneous effects, Theoretical limits

Abstract:

<p>In this paper, we develop a mathematical model for soluble lead redox flow battery. The model accounts for simultaneous effect of forced convection and induced free convection in electrolyte domain of the battery. It predicts existence of dominant free convection over the forced convection in vicinity of the electrodes. The predictions suggests that both, electrode kinetics and ion transfer assisted by free convection alone, controls charge-discharge characteristics of the battery. The free convection augments ion transfer rate to the electrodes. By virtue of this, limiting current density at the electrodes increases to twice the theoretical limit under forced convection. The predictions coherently explains Collins et al. [1]‘s observations of high charge efficiencies when charging currents are higher than the theoretical limit. Also, the model consistently explains Pletcher et al. [2]‘s observation of insensitivity of the battery characteristics to the electrolyte flow rate. The model predicts satisfactory battery performance even at microscopic (μL s−1) flow rates which opens up the possibility for significant reduction in electrolyte pumping cost. © 2018 Elsevier B.V.</p>

Notes:

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Cite this Research Publication

M. Nandanwar and Kumar, S., “A modelling and simulation study of soluble lead redox flow battery: Effect of presence of free convection on the battery characteristics”, Journal of Power Sources, pp. 536-544, 2019.