28 Apr '15, 8pm

"Holey" Graphene Improved as an Electrode Material

"Holey" Graphene Improved as an Electrode Material

Researchers at the University of California San Diego (UCSD) have developed a method for increasing the amount of electric charge that graphene can store as an electrode material in supercapacitors. The key to what the researchers have done is making the graphene “holey.” The UCSD team is not the first to recognize the merits of “holey” graphene. Last year, researchers at the California NanoSystems Institute (CNSI) at UCLA developed what they termed a “holey graphene framework;” they claimed that it significantly boosted the energy density of supercapacitors. The CNSI researchers concluded that an energy density of a fully packaged device stack based on the holey-graphene framework is capable of energy densities as high as 35 watt-hours per kilogram, which compares favorably to today’s upper average supercapacitor, which can get around 28 Wh/kg. The UCSD team told IEEE Spe...

Full article: http://spectrum.ieee.org/nanoclast/semiconductors/materia...

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