Saturday, March 14, 2009

A Rapid-Recharge Lithium Battery

It will recharge only 30 seconds, imagine you can recharge anything in 30 second, no more wires plugin waiting like 15 minute to recharge your dead phone!!!

Materials scientists at MIT report that they’ve invented a new kind of lithium-ion battery that can fully charge or discharge in seconds instead of minutes. If commercialized, the battery could allow future hybrid cars to rapidly recharge their batteries, or it may lead to new consumer products, the scientists say.

Batteries have a high-energy but low-power density. That is, they can store a lot of energy but can’t release it quickly. Batteries, such as those used in electric cars, “have a lot of energy, so you can drive at 55 miles per hour for a long time, but the power is low. You can’t accelerate quickly,” says Gerbrand Ceder, professor of materials science and engineering at MIT. Devices called ultracapacitors act in the opposite manner, storing less energy but releasing it in a hurry. The new battery chemistry, invented by Ceder and his graduate student Byoungwoo Kang, gives lithium-ion batteries a performance more akin to that of ultracapacitors.


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