Magnetization Changing Hydrated Vanadium Ion Structure and Accelerating Electrode Reaction Rate in Redox Flow Batteries

Abstract With the vigorous promotion of flow batteries in the field of new energy, realizing the efficient application of all-vanadium flow battery has become a research hotspot. In this paper, a new method of pre-magnetization of the electrolyte in a magnetic field is proposed. It is found through experiments that the conductivity of the treated electrolyte is increased by 3.7%, and the electrochemical impedance is significantly reduced. In this paper, the electrolyte pre-magnetization phenomenon is explained from the microscopic point of view by means of molecular dynamics simulation and magnetohydrodynamics knowledge; the electrolyte is subjected to Lorentz force under the action of an external magnetic field, resulting in the destruction of hydrogen bonds of water molecules, the decrease of hydrated ion clusters, and the increase of vanadium ion diffusion coefficient, which in turn affects the state of chemical reaction and ultimately leads to the change of battery operating efficiency.