Figure 1. Schematic of a redox flow battery. The redox couple solutions are circulated through the redox cell containing the electrodes and the proton exchange membrane

From

Vanadium Redox Flow Batteries with Different Electrodes and Membranes

A. Habekost

World Journal of Chemical Education. 2018, 6(1), 8-13 doi:10.12691/wjce-6-1-2