I went lookin at Vanadium batteries. Sounds good, but the technology isnt quite ready,, may never be.. Or, maybe even With the costs & limitations, its a good idea,, sure sounds smarter than Nukular POwer,, that stuffs wrecking the planet,,
he energy density of VRBs
depends on the concentration of vanadium: the higher the concentration, the higher the
energy density. Sulfuric acid solutions, the electrolyte used in current VRBs, can only hold
a certain number of vanadium ions before they become oversaturated, and they only allow
the battery to work effectively in a small temperature window. In addition, VRBs usually
require expensive polymer membranes due to the highly acidic and oxidative environment,
which lead to high system costs. The low energy densities and small operating temperature
window, along with high capital cost, make it difficult for the current VRBs to meet the
performance and economic requirements for broad market penetration.
2 page PDF w/ pics.
http://energy.gov/sites/prod/files/VRB.pdf