Graphene and carbon nanotube based electrochemical capacitor in aqueous electrolyte

Jantan, Nurul Hazimah (2014) Graphene and carbon nanotube based electrochemical capacitor in aqueous electrolyte. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

Text (24 Pages) Graphene carbon nanotube based electrochemical capasitor.pdf - Submitted Version Download (1MB)

Abstract

Electrochemical capacitors (ECs) are electrochemical storage devices which possess the energy densities and power densities which complement the role of batteries (high energy) and conventional capacitors (high power) for storing energy and delivering power. Interestingly there are of great interest from researchers about using carbon materials based electrode for ECs due to their accessibility, an easy processability, environmental friendly, good electrical conductivity, high surface area, and relatively low cost. In this study, ECs were fabricated by using graphene and multiwalled carbon nanotubes (MWCNTs) as EC electrode material as well as binder with ratio 47.5:47.5:5. Also, 6M KOH and 1M H2SO4 were used as electrolyte. Electrochemical measurements such as cyclic voltammetry (CV) were performed to determine the capacitance value, lifecycle and determination of fabricated EC. The excellent performance can be attributed to the physical structures and the intrinsic conductivity owing by the EDLC graphene and MWCNT electrode. The specific capacitance value gained from the experiment was 12.07 F/g (6M KOH electrolyte) and 4.34 F/g (1M H2SO4).

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