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    Nanoflowers Improve Ultracapacitors
    Posted on Tuesday, September 16, 2008 @ 23:01:05 GMT by vlad

    Aux-Equipment Nanoflower power: A transmission electron microscope image shows a flowerlike manganese oxide nanoparticle deposited at the junction of crossed carbon nanotubes. Used as an electrode material, this nanotube-manganese-oxide composite could improve the energy-storage ability of ultracapacitors, which show promise as powerful, long-lasting replacements for batteries.
    Credit: American Chemical Society

    Imagine a cell-phone battery that recharges in a few seconds and that you would never have to replace. That's the promise of energy-storage devices known as ultracapacitors, but at present, they can store only about 5 percent as much energy as lithium-ion batteries. An advance by researchers at the Research Institute of Chemical Defense, in China, could boost ultracapacitors' ability to store energy.


    A capacitor consists of two electrodes with opposite charges, often separated by an insulator that keeps electrons from jumping directly between them. The researchers have developed an electrode that can store twice as much charge as the activated-carbon electrodes used in current ultracapacitors. The new electrode contains flower-shaped manganese oxide nanoparticles deposited on vertically grown carbon nanotubes...

    More: http://www.technologyreview.com/Energy/21375/?a=f

     
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    "Nanoflowers Improve Ultracapacitors" | Login/Create an Account | 1 comment | Search Discussion
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    Nanotube Superbatteries (Score: 1)
    by vlad on Saturday, January 10, 2009 @ 11:42:30 GMT
    (User Info | Send a Message) http://www.zpenergy.com
    Nanotube Superbatteries /Dense films of carbon nanotubes store large amounts of energy. ...By Katherine Bourzac

    Researchers at MIT have made pure, dense, thin films of carbon nanotubes that show promise as electrodes for higher-capacity batteries and supercapacitors. Dispensing with the additives previously used to hold such films together improved their electrical properties, including the ability to carry and store a large amount of charge.

    More: http://www.technologyreview.com/energy/21938/?a=f [www.technologyreview.com]



     

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