Research and simulation of electrochemical processes in vanadium batteries

Formulation of the problem: In the modern world, the development of efficient energy sources is becoming an increasingly important issue. One of the promising areas in the field of electrochemical energy sources is vanadium batteries. These batteries are based on electrochemical processes involving vanadium in various oxidative states. Research and modeling of electrochemical processes in vanadium batteries are important to optimize their performance and improve energy efficiency. Research and modeling of electrochemical processes in vanadium batteries play a key role in the development of efficient energy sources. Understanding the basic principles of operation of vanadium batteries, as well as the development of accurate mathematical models and their numerical simulation, allows optimizing the processes associated with storing and releasing energy. Further research and development in this area could lead to the creation of more efficient and sustainable energy sources that can meet the sustainable energy needs of modern society. Objective of the project: modeling the processes of vanadium redox flow batteries (VRFB) by varying the electrolyte flow to optimize electrochemical processes occurring under membrane-electrode boundary conditions. Results: this study simulates in the COMSOL Multiphysics software package the electrochemical characteristics of HFSC as a function of electrolyte flow. Tests were carried out in which the flow velocity parameters were examined to evaluate their effect on the potential distribution and current density. Practical significance: the energy in an HFSC is stored in a liquid electrolyte that is pumped through the cell. The electrolyte is stored in external reservoirs rather than in porous electrodes as in conventional batteries. The results contribute to improved efficient energy storage, load balancing, and peak power smoothing of the GRPB. The construction of models allows us to predict the effect on the efficiency of mixing electrolytes, taking into account the hydrodynamic conditions inside the battery to determine how they affect the transport of vanadium ions, taking into account the electrolyte flow rate.