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Scientists at MIT have developed a positive electrode made of carbon nanotubes that significantly boosts lithium ion battery performance and could lead to much greater range in electric vehicles and longer battery lives for gadgets.
The carbon nanotube electrodes enable lithium ion batteries to deliver ten times more power than a conventional battery and store five times more energy than a conventional ultracapacitor. The nanotubes accomplish this because they have a very high surface area for storing and reacting with lithium, which increases the battery's storage capacity and the speed at which it can charge and discharge.
The MIT scientists have already licensed the technology to a battery company (as yet, unnamed) and are perfecting quick methods of making the electrodes, like spraying the nanotubes on a substrate, to facilitate mass production.
MIT Technology Review
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written by Mitch, June 22, 2010
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written by Saar, June 23, 2010
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written by m, July 22, 2010
"The more total lithium the battery can store, the greater its total energy storage capacity. The faster the ions can move out of one electrode and into the other, the greater its power. In work published this week in the journal Nature Nanotechnology, the MIT group showed that lithium ions in a battery electrolyte react with oxygen-containing chemical groups on the surface of the carbon nanotubes in the film. Because of the huge surface area and porous structure of the nanotube electrodes, there are many places for the ions to react, and they can travel in and out rapidly, which gives the nanotube battery high energy capacity and power, says Shao-Horn."
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Thats an incorrect conclusion.
Power delivery and energy capacity are not the same. Current capacitors have excellent power delivery but poor energy capacity. If this technology had five times the energy capacity of a conventional battery that conclusion would be correct.