Exfoliation of graphite oxide in propylene carbonate and thermal reduction of the resulting graphene oxide platelets.

Zhu, Yanwu; Stoller, Meryl D; Cai, Weiwei; Velamakanni, Aruna; Piner, Richard D; Chen, David; Ruoff, Rodney S · ACS Nano · 2010

basic_science · Level V

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Abstract

Graphite oxide was exfoliated and dispersed in propylene carbonate (PC) by bath sonication. Heating the graphene oxide suspensions at 150 degrees C significantly reduced the graphene oxide platelets; paper samples comprising such reduced graphene oxide platelets had an electrical conductivity of 5230 S/m. By adding tetraethylammonium tetrafluoroborate (TEA BF(4)) to the reduced graphene oxide/PC slurry and making a two-cell ultracapacitor, specific capacitance values of about 120 F/g were obtained.