Middle East Island All-vanadium Liquid Flow Battery

Why do flow batteries use vanadium chemistry?

This demonstrates the advantage that the flow batteries employing vanadium chemistry have a very long cycle life. Furthermore, electrochemical impedance spectroscopy analysis was conducted on two of the battery stacks. Some degradation was observed in one of the stacks reflected by the increased charge transfer resistance.

Does the vanadium flow battery leak?

It is worth noting that no leakages have been observed since commissioned. The system shows stable performance and very little capacity loss over the past 12 years, which proves the stability of the vanadium electrolyte and that the vanadium flow battery can have a very long cycle life.

Where is Aramco Fe/V flow battery located?

This Fe/V flow battery is located in Wa’ad Al-Shamal, in western Saudi Arabia. It can deliver a MW/hour and support up to five wells across its projected 25 year lifespan. Aramco says that the system “offers a robust alternative to existing solar energy solutions and can handle variable power demands efficiently and cost-effectively.”

How is energy stored in a vanadium electrolyte system?

The energy is stored in the vanadium electrolyte kept in the two separate external reservoirs. The system capacity (kWh) is determined by the volume of electrolyte in the storage tanks and the vanadium concentration in solution. During operation, electrolytes are pumped from the tanks to the cell stacks then back to the tanks.