Liquid electricity- vanadium redox battery
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27-08-2009, 01:36 PM

The reason why electric cars aren™t everywhere is simple ” at the end of their range, they have to be stationary for hours while the batteries are recharged.

[Image: fillbattery.jpg]

This is a pity, because even cars recharged from Ëœdirtyâ„¢ power stations are three times more environmentally friendly than conventional vehicles. Thatâ„¢s because only 20 per cent of the energy from gasoline or diesel actually reaches the wheels; in an electric car, itâ„¢s 60 per cent.

What recharging does is to change the state of the electrolyte fluid in the batteries. Now a Dutch government research organisation, the Innovation Network in Utrecht, has come up with a solution by standing the problem on its head.

Just pump the spent electrolyte out and pump in freshly charged electrolyte ” literally, liquid electricity. This would take little more time than filling up with fossil fuel and the spent electrolyte can be recharged and re-sold: you would pay for the difference in electric charge.

It gets better. The Innovation Network foresees a new generation of Ëœphoton farmersâ„¢ using wind, solar or waste biomass to make clean electricity to recharge electrolyte and sell it at filling stations.

Nearly all farmers have enough space on their properties to build wind turbines, solar collectors or biomass plants. And it would end the craziness of using food plants such as corn and sugar cane to produce ethanol, a practice that is already driving the price of food almost beyond the reach of the worldâ„¢s poorest populations.

its all haapens by using vanadium redox battery
(and redox flow) battery is a type of rechargeable flow battery that employs vanadium redox couples in both half-cells, thereby eliminating the problem of cross contamination by diffusion of ions across the membrane. The present form (with sulfuric acid electrolytes) was patented by the University of New South Wales in Australia in 1986 [ Although the use of vanadium redox couples in flow batteries had been suggested earlier by Pissoortby NASA researchers and by Pellegri and Spaziante in 1978 , the first successful demonstration and commercial development was by Maria Skyllas-Kazacos and co-workers at the University of New South Wales in the 1980s The vanadium redox battery exploits the ability of vanadium to exist in solution in four different oxidation states, and uses this property to make a battery that has just one electroactive element instead of two.

The main advantages of the vanadium redox battery are that it can offer almost unlimited capacity simply by using larger and larger storage tanks, it can be left completely discharged for long periods with no ill effects, it can be recharged simply by replacing the electrolyte if no power source is available to charge it, and if the electrolytes are accidentally mixed the battery suffers no permanent damage.

The main disadvantages with vanadium redox technology are a relatively poor energy-to-volume ratio, and the system complexity in comparison with standard storage batteries.

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02-02-2012, 10:57 AM

to get information about the topic LIQUID ELECTRICITY full report ,ppt and related topic refer the link bellow

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