Iron liquid flow battery energy storage video

What is an iron-based flow battery?

Iron-based flow batteries designed for large-scale energy storage have been around since the 1980s, and some are now commercially available. What makes this battery different is that it stores energy in a unique liquid chemical formula that combines charged iron with a neutral-pH phosphate-based liquid electrolyte, or energy carrier.

How do Iron Flow batteries work?

The operation of iron flow batteries is straightforward. They use electrolyte solutions containing iron ions, which flow through a reaction cell where energy conversion takes place. This design allows for easy scaling. Users can simply increase the size of the tanks to store more energy without changing the battery’s chemistry.

Are iron flow batteries soluble?

“With these conventional iron flow batteries, the liquid is on the cathode, and they use a fully dissolved catholyte. But on the anode side, they take advantage of iron plating,” Li said. “We wanted to find a way to make the battery full flow, entirely soluble, and remove the iron plating so that we could improve upon the original design.”

How does a flow battery store energy?

The larger the electrolyte supply tank, the more energy the flow battery can store. The aqueous iron (Fe) redox flow battery here captures energy in the form of electrons (e-) from renewable energy sources and stores it by changing the charge of iron in the flowing liquid electrolyte.

Are iron flow batteries a good choice?

“The new iron flow battery is a good candidate for longer duration batteries, with discharge over 10-20 hours,” he said. “And we have improved on this old design because of a fundamental understanding of both the battery and the material design. By engaging in a deep dive into the materials, we discovered things we didn’t know before.

How long do Iron Flow batteries last?

For example, a study by researchers at Stanford University in 2020 demonstrated that iron flow batteries maintained over 90% capacity after more than 10,000 cycles. In comparison, lithium-ion batteries typically last between 500 to 1,500 cycles. Iron flow batteries contain non-toxic materials, making them more environmentally friendly.