In this paper, we present experimental studies of electrochemical performance of an all-vanadium redox flow battery cell employing an active area of 103 cm2, activated carbon felt, and a novel flow field, which ensures good electrolyte circulation at low pressure drops. Extended testing over 151 consecutive charge/discharge cycles has shown steady performance with an energy efficiency of 84% and capacity fade of only 0.26% per cycle. Peak power density of 193 mW cm−2 has been obtained at an electrolyte circulation rate of 114 ml min−1, which corresponds to stoichiometric factor of 4.6. The present configuration of the cell shows 20% improved in peak power and 30% reduction in pressure drop when compared to a similar cell with a different electrode and a serpentine flow field.
High Energy Efficiency With Low-Pressure Drop Configuration for an All-Vanadium Redox Flow Battery
Chennai 600036, India
Manuscript received July 30, 2016; final manuscript received January 23, 2017; published online February 23, 2017. Assoc. Editor: Matthew Mench.
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Kumar, S., and Jayanti, S. (February 23, 2017). "High Energy Efficiency With Low-Pressure Drop Configuration for an All-Vanadium Redox Flow Battery." ASME. J. Electrochem. En. Conv. Stor. November 2016; 13(4): 041005. https://doi.org/10.1115/1.4035847
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