Exfoliation of Graphite Oxide in Propylene Carbonate and Thermal Reduction of Resulting Graphene Oxide Platelets
OwnerRodney S. Ruoff, Meryl D. Stoller +1inventors
InventorsRodney S. Ruoff, Meryl D. Stoller, Yanwu Zhu
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Abstract
Disclosed are compositions and methods wherein graphite oxide was exfoliated and dispersed in propylene carbonate (PC) by bath sonication. Heating the graphene oxide suspensions at 150° C. significantly reduced the graphene oxide platelets; paper samples comprised of such reduced graphene oxide platelets had an electrical conductivity of 5230 S/m. By adding TEA BF4 to the reduced graphene oxide/PC slurry and making a 2-cell ultracapacitor, specific capacitance values of about 120 F/g were obtained.
Claims20
A composition comprising a suspension of at least one of a graphite material or a graphene material in a non-aqueous liquid.
A method for preparing a reduced graphene oxide material, the method comprising exfoliating at least one of a graphite material or a graphene material in a non-aqueous solvent to provide a suspension.
An ultracapacitor comprising a reduced graphene oxide, wherein the reduced graphene oxide is prepared by exfoliating graphite oxide in a non-aqueous liquid.
Dependencies are inferred from the claim text.