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Soluble Lead-Acid Redox Flow Battery

Application ID: 10023

In a redox flow battery electrochemical energy is stored as redox couples in the electrolyte, which is stored in tanks outside the electrochemical cell. During operation, electrolyte is pumped through the cell and, due to the electrochemical reactions, the individual concentrations of the active species in the electrolyte are changed.

The state of charge of the flow battery is determined by the electrolyte species concentrations, the total flowing electrolyte volume in the system (tank+pump+hoses+cell), and possibly also by the concentration of solid species on the electrodes. Depending on the cell chemistry the cell can have separated or combined anode and cathode compartments and electrolyte tanks.

This model simulates a soluble lead-acid flow battery during an applied charge-discharge load cycle. The surface chemistry of the positive electrode is modeled by using two different lead oxides and two different positive electrode reactions in the model.

This application was built using the following:

Batteries & Fuel Cells Module

The combination of COMSOL® products required to model your application depends on the physics interfaces that define it. Particular physics interfaces may be common to several products (see the Specification Chart for more details). To determine the right combination of products for your project, you should evaluate all of your needs in light of each product's capabilities, consultation with the COMSOL Sales and Support teams, and the use of an evaluation license.