alexa Graphene-based ultracapacitors.
Microbiology

Microbiology

Journal of Microbial & Biochemical Technology

Author(s): Stoller MD, Park S, Zhu Y, An J, Ruoff RS

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Abstract The surface area of a single graphene sheet is 2630 m(2)/g, substantially higher than values derived from BET surface area measurements of activated carbons used in current electrochemical double layer capacitors. Our group has pioneered a new carbon material that we call chemically modified graphene (CMG). CMG materials are made from 1-atom thick sheets of carbon, functionalized as needed, and here we demonstrate in an ultracapacitor cell their performance. Specific capacitances of 135 and 99 F/g in aqueous and organic electrolytes, respectively, have been measured. In addition, high electrical conductivity gives these materials consistently good performance over a wide range of voltage scan rates. These encouraging results illustrate the exciting potential for high performance, electrical energy storage devices based on this new class of carbon material. This article was published in Nano Lett and referenced in Journal of Microbial & Biochemical Technology

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