Iron Flow Battery technology and its role in Energy Storage
Iron flow battery-based storage solutions have recently made a historical breakthrough to counter some of the disadvantages of lithium-ion battery solutions. They offer
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.
A new iron-based aqueous flow battery shows promise for grid energy storage applications. A commonplace chemical used in water treatment facilities has been repurposed for large-scale energy storage in a new battery design by researchers at the Department of Energy's Pacific Northwest National Laboratory.
In that case, the spent electrolyte is pumped to the electrode, thus charging the electrolyte and pumping it to the external storage tank. The electrolyte of iron flow batteries consists of iron salts which are abundant earth minerals in ionized form which store the electrical energy in the form of chemical energy.
Some of the types of flow batteries include: Vanadium redox flow battery (VRFB) – is currently the most commercialized and technologically mature flow battery technology. All iron flow battery – All-iron flow batteries are divided into acidic and alkaline systems, and acidic all-iron flow batteries are relatively mature in commercial development.
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