From: Global Situation Report
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One very promising new battery technology has been developed in Australia by Professor Maria Skyllas-Kazacos at the University of New South Wales School of Chemical Engineering and Industrial Chemistry. Her device, called the Vanadium Redox battery, has many advantages over other types,
among them much longer life, higher storage capacity, the ability to deliver power at varying voltage, relatively low toxicity and relatively low cost.
It is seen as having great commercial potential for electric power storage in solar and wind power installations and in many situations where emergency back-up power is required.

The unique design employs two different liquids that circulate through the battery cell as needed, interacting to create electricity. As such, the battery can be recharged simply by refreshing the liquids. For this reason,
the Vanadium Redox battery may prove especially useful in electric automobiles. But it is also highly scalable -- that is, it can be made almost any size -- and therefore could have many industrial applications as well.

Kashima-Kita Electric Power Corporation, a subsidiary of Japan's Mitsubishi Chemical Corporation, is licensed to develop the Vanadium Redox battery and is building several demonstration power installations in Japan and the United States.

See and for further information.

[Thanks to Daniel Drasin for this information.]