vanadium

Knight describes the color changes as the vanadium is reduced - yellow -> green -> blue -> violet as the vanadium receives electrons from the zinc.

Metallic vanadium is not found in nature, but vanadium compounds occur naturally in about 65 different minerals.

Much of the world's vanadium production is sourced from vanadium-bearing magnetite found in ultramafic gabbro bodies.

So basically the point is that Vanadium presents the most efficient method of power storage we know of to date?

The vanadium-redox battery was an advance because with the same electrolyte on both sides you don't have that problem (but vanadium is expensive in this application).

This may eventually be mitigated by better batteries, and alternative power storage systems like Vanadium Flow systems.

The various stages of vanadium compounds are likely a bigger concern than the various reaction agents.

The problem, near as I can tell, is that even with the benefits, vanadium is still too expensive.

As an alternative for small-scale production, vanadium pentoxide is reduced with hydrogen or magnesium.

I've only heard rumors of its code name: Vanadium (but would love to get confirmation of that).

With vanadium you are only limited by the size of your electrolyte tank.

The additional advantage is that vanadium reserves are much greater than lithium reserves.

What he probably meant was that "in one tank, the vanadium releases electrons, turning from blue to yellow while in the other tank, vanadium accepts electrons, turning from yellow to blue."

From the article in reference to sea squirts that digest vanadium: "Having committed themselves to this life of tedium, they also digest their redundant brains".

"In one tank, the vanadium releases electrons, turning from yellow to blue." At least one of these statements are incorrect.

I'm particularly fond of a KAI "Wasabi" brand vanadium steel santoku knife that is terribly easy to maintain and cuts like magic, and has for years.

Vanadium is mined mostly in South Africa, north-western China, and eastern Russia.

Vanadium is the best performer in their current laboratory test system - a type of redox flow unit - similar to a simple battery.

(First thing that came to mind)) As there is no efficient and decently long-lasting power storage at grid scales (Vanadium-redox batteries are good, but have issues.