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Capacitor technology approaches battery-like behavior and capacity
Posted on Saturday, April 23, 2005 @ 23:47:23 UTC by vlad

Devices Matthew Zenkar writes (free_energy yahoo group): Another interesting article. This one seems to have the potential to eliminate batteries. Just think how happy the environmentalists will be with this. ;-) Then again, the conservatives will probably pass a bill designed to keep this off the market and preserve the profits and pollution of the battery industry. :-(

All the best,
Matthew



Ultracapacitors

Project Title:

Carbon Nanotube Enhanced Ultracapacitors (poster)

Investigators:

John Kassakian, Joel Schindall, Riccardo Signorelli

Introduction:

Introduction Ultracapacitors or double layer capacitors (DLCs) are energy storage devices whose operation is based on the double layer effect. By utilizing highly porous carbon material with a surface area up to 2000m2/g as electrodes (as in Fig. 3) commercial DLCs can achieve a energy density (6Wh/kg) much greater than the energy density of a conventional capacitor. However, this figure is much lower than the energy density reached by Lithium-Ion batteries (120Wh/kg).

Our analysis shows that the utilization of a matrix of vertically aligned CNTs as electrode structure, can lead to an ultracapacitor characterized by a power density greater than 100kW/kg (three orders of magnitude higher than batteries), a lifetime longer than 300,000 cycles, and an energy density higher than 60Wh/kg...."

Read the whole article here: http://lees.mit.edu/lees/projects/cnt_ultracap_project.htm

 
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"Capacitor technology approaches battery-like behavior and capacity" | Login/Create an Account | 2 comments | Search Discussion
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Re: Capacitor technology approaches battery-like behavior and capacity (Score: 1)
by nadero on Sunday, April 24, 2005 @ 08:18:57 UTC
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Its capacity, 60Wh/kg, is an order of magnitude lower than state of the art Lithium-Ion batteries (600Wh/Kg)



Re: Capacitor technology approaches battery-like behavior and capacity (Score: 1)
by Joshua on Sunday, April 24, 2005 @ 18:04:28 UTC
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Oh, and the Dems got anything "energy" through in the last several decades.



 

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