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Microwave Assisted Exfoliation And Reduction Of Graphite Oxide For Ultracapacitors

Yanwu Zhu, S. Murali, M. Stoller, A. Velamakanni, R. Piner, R. Ruoff
Published 2010 · Materials Science

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We report a simple yet versatile method to simultaneously achieve the exfoliation and reduction of graphite oxide. By treating graphite oxide powders in a commercial microwave oven, reduced graphite oxide materials could be readily obtained within 1 min. Extensive characterizations showed that the as-prepared materials consisted of crumpled, few-layer thick and electronically conductive graphitic sheets. Using the microwave exfoliated graphite oxide as electrode material in an ultracapacitor cell, specific capacitance values as high as 191 F/g have been demonstrated with KOH electrolyte.
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