Session X21: Focus Session: Graphene: Devices

2:30 PM–5:42 PM, Thursday, March 18, 2010
Room: Portland Ballroom 251

Sponsoring Unit: DMP
Chair: Vasili Perebeinos, IBM

Abstract ID: BAPS.2010.MAR.X21.8

Abstract: X21.00008 : Ultrathin Graphene Membranes as Flexible Electrodes for Electrochemical Double Layer Capacitors

4:18 PM–4:30 PM

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  Saikat Talapatra
    (Physics, Southern Illinois University Carbondale)

  Swastik Kar
    (Physics, Rensselaer Polytechnic Insititute)

  Rakesh Shah
    (Physics, Southern Illinois University Carbondale)

  Sujoy Ghosh
    (Physics, Southern Illinois University Carbondale)

  Xiaohong An
    (Physics, Rensselaer Polytechnic Institute)

  Trevor Simmons
    (Chemistry and Chemical Biology, Rensselaer Polytechnic Institute)

  Morris Washington
    (Physics, Rensselaer Polytechnic Institute)

  Saroj Nayak
    (Physics, Rensselaer Polytechnic Institute)

We will present the results of our investigations of electrochemical double layer capacitors (EDLCs) or supercapacitors (SC) fabricated using graphene based ultra thin membranes. These EDLC's show far superior performance compared to other carbon nanomaterials based EDLC's devices. We found that the graphene based devices possess specific capacitance values as high as 120 F/g, with impressive power densities ($\sim $105 kW/kg) and energy densities ($\sim $9.2 Wh/kg). Further, these devices indicated rapid charge transfer response even without the use of any binders or specially prepared current collectors. Our ultracapacitors reflect a significant improvement over previously reported graphene-based ultracapacitors and are substantially better than those obtained with carbon nanotubes.

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