Abstract
<p><span lang="EN-GB">Periodic electrochemical oscillation of the anolyte was reported for the first time in a simulated charging process of the vanadium redox flow batteries. The electrochemical oscillation could be explained in terms of the competition between the growth and the chemical dissolution of V<sub>2</sub>O<sub>5</sub> film. Also, the oscillation phenomenon was possible to regular extra power consumption. The results of this paper might enable new methods to improve the charge efficiency and energy saving for vanadium redox flow batteries.</span></p>
Highlights
Vanadium is an important metal used for manufacturing iron, steel non-ferrous metals, and petrochemicals because of its excellent physicochemical properties [1,2,3,4]
The results of chronopotentiometry with current ramp experiments are used to judge the appearance of electrochemical oscillation
The oscillation period was decreased with charge current and the trend was consistent with the induction period
Summary
Vanadium is an important metal used for manufacturing iron, steel non-ferrous metals, and petrochemicals because of its excellent physicochemical properties [1,2,3,4]. The reaction that occurs at the positive electrode of the VRFB during charge and discharge process is defined as follows: VO2+ H2O - e d icshcah ra greg e VO2+ + 2H+ We have reported the periodic electrochemical oscillation of the anolyte in a simulated charging process of the VRFB.
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