Posted by: Dr. Breffni Lennon | June 19, 2012

New Scientist: Seawater battery sparks sub dreams

A breakthrough in battery technology has seen a Californian start-up company, PolyPlus, exploit the reaction between lithium metal and seawater that may lead to a revolution in the powering of offshore devices from autonomous submarines and buoys, to deep-water sensors.

“Lithium is already widely used in batteries because it is lightweight and has a high electrochemical potential. This potential allows it to generate in excess of 3 volts compared with 2 volts for lead-acid batteries and 1.5 volts for zinc-carbon cells. Today’s lithium batteries pack plenty of energy by weight: around 400 watt-hours per kilogram compared with 100 Wh/kg for alkaline batteries and 40 Wh/kg for lead-acid batteries.”

The New Scientist article can be accessed in full here.

The see what happened at the Catch The Next Wave conference organised by New Scientist and Oceanology International 2012 please click here.


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