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Startup Lands Seed Money to Commercialize Graphene-Based Ultracapacitors

Graphene Energy Inc., an Austin, Texas-based startup formed in December 2008 to commercialize chemically modified graphene (CMG) ultracapacitors (earlier post) has raised $500,000 in seed money from Quercus Trust and 21Ventures.

The company also concluded licensing terms for its technology from the University of Texas at Austin and The College of William and Mary. Graphene Energy says that its technology is the result of the efforts of the Ruoff research group at the University of Texas at Austin. Prof. Rod Ruoff and his team published a paper in September 2008 in the journal Nano Letters describing the development of chemically modified graphene and its application in an ultracapacitor. Graphene is a one atom thick structure of bonded carbon atoms that are densely packed in a honeycomb crystal lattice.

As reported in the paper, the surface area of a single graphene sheet is 2,630 m2/g, substantially higher than values derived from BET surface area measurements of activated carbons used in current electrochemical double layer capacitors. The group measured specific capacitances of 135 and 99 F/g in aqueous and organic electrolytes, respectively, in devices using the CMG material.

Resources

  • Meryl D. Stoller, Sungjin Park, Yanwu Zhu, Jinho An, and Rodney S. Ruoff (2008) Graphene-Based Ultracapacitors. ASAP Nano Lett., doi: 10.1021/nl802558y

Comments

ejj

"There are reasons to think that the ability to store electrical charge can be about double that of current commercially used materials. We are working to see if that prediction will be borne out in the laboratory."---Rod Ruoff, a mechanical engineering professor and a physical chemist.

Double the current capacity of batteries is still a fraction of the energy of EEStor ultracapacitors.

Treehugger

double the current capacity of best commercialy available ultracapacitotr will be bring you close to 30Wh/Kg which is the value of a Pb battery (but more in practice since you can do full deep discharge on an ultracapacitor and you cannot on the battery so you are more close to the equivalent of 60Wh/Kg battery in practice) not bad at all and at least these people look real and serious refering to published work that the scientific community have access to. Not like this scam of EESTOR

Mannstein

One can't do full discharge on capacitors because the discharge characteristic on a capacitor falls off linearly unlike a battery.

ADVILL

100 % agree with comments about EESTOR.....but what about Lockhead contract for electromagnetic railgun (EMRG)and other US Navy applications?.

Perhaps EJJ is right but they has been talking seriouly with Navy about huge versions of EESTOR for EMRG and laser guns where obtention of huge amounts of MW´s instant electric energy has been a problem.

Still from my point of view the best solution for ev´s will be the combination of LIFO4 batts in combination con some kind of ultracapacitor.

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