Energy Storage graphene-ultracapacitor

Published on February 28th, 2013 | by Nicholas Brown

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Graphene Supercapacitors Offer Blistering Performance and Charge in a Couple of Minutes

graphene-ultracapacitorResearchers at the University of California are developing graphene supercapacitors that can charge and discharge in a couple of minutes. The ability to discharge in a couple of minutes means that they are extremely powerful. More importantly though, these researchers developed a technique for printing graphene supercapacitors using a DVD burner.

The researchers dissolved graphite oxide in water and heated it with a laser from a standard DVD burner to obtain flexible graphene sheets. These graphene sheets are one-atom thick, yet can hold a remarkable amount of energy, while being charged or discharged in very little time compared to standard batteries.

Ultracapacitors have tremendous advantages over typical lithium-ion batteries, some of which are of paramount importance to the adoption of electric cars, such as their ability to charge in as little as 1 second, and last 20 years (easily, and with very heavy usage). While this technology could mean ever-smaller handheld electronic devices, the real beneficiaries could be electric cars. If supercapactiors replace batteries as the primary energy storage method on EVs, it could mean much faster charge times, and much longer range. This graphene sheet method could also make EVs a lot more affordable, thanks to this cost-effective method.

Will supercapacitors save the electric car?

Source: Science Daily

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About the Author

writes on CleanTechnica, Gas2, Kleef&Co, and Green Building Elements. He has a keen interest in physics-intensive topics such as electricity generation, refrigeration and air conditioning technology, energy storage, and geography. His website is: Kompulsa.com.



  • Remo

    This is fantastic as it could be used everywhere we use batteries at this point.  It will make a big difference if it can be cheap compared to what cars are costing today.

  • http://neilblanchard.blogspot.com/ Neil Blanchard

    I don’t think electric cars need “saving”.  I think we need to improve batteries, yes – but we also need to greatly improve the *cars* that the batteries are in!

    Neil

  • http://www.facebook.com/people/Efrain-Rojas/1297723783 Efrain Rojas

    This discovery was reported over a year ago. Where is a real world device based on this technology?

    • http://www.facebook.com/aaron.labertew Aaron Labertew

      The paper that just recently came out on this is outlining an effective way to mass produce this tech, so now they just need funding.  If they can’t get it from the traditional sources, I’d gladly chip in for it on Kickstarter!

  • http://www.facebook.com/people/Bruce-Miller/100000952005408 Bruce Miller

    Practical, high efficiency means of storing electricity – has huge array of practical uses, especially at higher voltages in the first place – this is the tip of the iceberg of higher voltage higher frequency explorations – NB. higher voltage means higher energy densities for a given weight of material, and higher power outputs without conversions – much smaller higher frequency motors, weighing much less with huge output potentials are probable. mt Question: Is this sort of thing found “under the hood” of the Chreos from China?

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  • Paul

    It would be nice if the article gave the slightest inkling of the energy density of these capacitors.  Unless they even begin to approach the energy density of the batteries, which in turn need to improve their own energy density to increase range, then they will not have any advantages over batteries.  Please tell us the energy density.

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