Journal
JOURNAL OF APPLIED ELECTROCHEMISTRY
Volume 34, Issue 7, Pages 681-685Publisher
SPRINGER
DOI: 10.1023/B:JACH.0000031168.03880.1a
Keywords
dissolution kinetics; redox flow cells; vanadium bromide redox cell; vanadium pentoxide dissolution
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A novel vanadium bromide redox flow battery employing a vanadium bromide electrolyte in both half-cells has been proposed. Preparation of the electrolyte for this redox cell requires the chemical dissolution of vanadium pentoxide powder in the acidic bromide supporting electrolyte. In this study, the kinetics of the chemical dissolution process were investigated and a second order surface controlled reaction is reported with rate equation given by: Rate = 5x1(0-)4 (l mol(-1) s(-1)) [Br-](2) at 25degreesC and an activation energy of 37.2 kJ mol(-1).
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