Abstract
Exfoliated graphite oxide was prepared by an improved Hummers method and was then reduced to graphene with hydrazine in the presence of ammonium hydroxide. N2 adsorption-desorption measurement showed that graphene so obtained had a specific surface area as high as 818 m2/g. Galvanostatic charge/discharge curves demonstrated that the as-prepared graphene exhibited a specific capacitance of 186.9 F/g at a current density of 0.1 A/g and that about 96% of the specific capacitance was retained after 2000 cycles at a current density of 5 A/g.
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Zhou, X., Wang, M., Lian, J. et al. Supercapacitors based on high-surface-area graphene. Sci. China Technol. Sci. 57, 278–283 (2014). https://doi.org/10.1007/s11431-014-5462-z
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DOI: https://doi.org/10.1007/s11431-014-5462-z