Abstract
In recent years, with the promotion of global renewable energy, the introduction of energy storage batteries has become more and more important. Redox flow battery has attracted more and more attention due to their environmental friendliness, safe and reliable operation. This work studies the effect of different magnetic field intensities and the duration of magnetic field addition on the mass transfer and electrochemical reaction process of iron-vanadium ions in deep eutectic solvent (DES). At the same time, the effect of magnetic field on the polarization performance of DES-based redox flow battery is also studied. The experimental results show that the iron and vanadium DES electrolytes increase their redox peak current density under the action of adding magnetic field. The test of the polarization performance of the DES-based redox flow battery shows that the addition of magnetic field can reduce the area specific resistance (ASR) of the battery and improve the polarization performance of the battery.
Highlights
In recent years, with the promotion of global renewable energy, from the perspective of power system stability, the introduction of energy storage batteries has become more and more important
This work studies the effect of magnetic field intensities and the duration of the added magnetic field on the mass transfer and electrochemical reaction process of ironvanadium ions in deep eutectic solvent (DES)
By studying the electrochemical characteristics of iron-vanadium DES electrolyte with different magnetic field intensities, it is concluded that as the magnetic field intensity increases, the redox peak current density of the ironvanadium DES electrolyte both increase, which indicates that the rate of oxidation-reduction reaction of the electrolyte increases due to the enhancement of the magnetic field intensity, the movement of ions is accelerated, which the electrochemical reaction is easier to proceed
Summary
With the promotion of global renewable energy, from the perspective of power system stability, the introduction of energy storage batteries has become more and more important. Redox flow battery (RFB) has the advantages of environmental friendliness, flexible design, high energy efficiency, safe and reliable operation, fast startup speed, etc., and can solve the problems of discontinuity, instability and uncontrollability [1,2,3]. The current aqueous redox flow battery has problems such as narrow electrochemical window (
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