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Dona, Dilini Galpaya Galpayage
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Publications (4/4 displayed)
- 2015Investigation on temperature-dependent electrical conductivity of carbon nanotube/epoxy composites for sustainable energy applicationscitations
- 2015The effect of graphene oxide and its oxidized debris on the cure chemistry and interphase structure of epoxy nanocompositescitations
- 2014Preparation of graphene oxide/epoxy nanocomposites with significantly improved mechanical propertiescitations
- 2013Graphene-based thin film supercapacitor with graphene oxide as dielectric spacercitations
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article
Graphene-based thin film supercapacitor with graphene oxide as dielectric spacer
Abstract
Thin film supercapacitors are produced by using electrochemically exfoliated graphene (G) and wet-chemically produced graphene oxide (GO). Either G/GO/G stacked film or sole GO film are sandwiched by two Au films to make devices, where GO is the dielectric spacer. The addition of graphene film for charge storage can increase the capacitance about two times, compared to the simple Au electrode. It is found that the GO film has very high dielectric constant, accounting for the high capacitance of these devices. AC measurements reveal that the relative permittivity of GO is in the order of 104 within the frequency range of 0.1–70 Hz.