Tuesday, October 7, 2008

Tomorrow's energy today Pt. 3: The vanadium redox flow battery

Despite it's name, vanadium is not a product of Stark Industries, nor does it fuel any piece of Iron Man's ragingly cool and seemingly low-emission suit. I didn't notice much of a vapor trail, so I'm assuming the metallic muscle man has a relatively low carbon footprint.

[If anyone knows the fuel specs of Iron Man's suit, I would appreciate a head's up. Not finding anything on the web except how much he can lift, how much damage he does in equivalence to pounds of TNT and how fast he flies. No fuel specs.]

While we're in the Zen mode of exploring what things are not, the vanadium redox flow battery is not an invention of Jack Marlowe's Halo Industries, nor will never be used in a cell phone, lap top or even an electric vehicle.

In fact, the vanadium redox flow battery is even more unwieldy than its name.

The battery is enormous, with two tanks of electrolytic liquids that create a charge in a central chamber then flow back to their tank. The energy can be stored and reused almost indefinitely. The problem was that the membrane separating the two liquids would eventually weaken and when the two mix, they were rendered unusable.

The answer was to use vanadium, a soft whitish metal found abundantly and has four state of oxidation. Each state of oxidation has a different energy capacity diluted in liquid. Even when the two states mix, there is no loss because the vanadium can easily flow from one state to another.

The sun goes down at night and wind is as capricious as the mythical wind gods once believed behind it.

With a vanadium redox flow battery, a power plant will not have to rely on natures whims. With this battery at its core, a plant can run almost indefinitely.



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