Production of Activated Carbon Electrodes from Sago Waste and its application for an Electrochemical Double-Layer Capacitor

摘要

Research on the utilization of sago waste as an activated carbon electrode for an electrochemicaldouble-layer capacitor (EDLC) has been successfully performed. An important part of the EDLC is thehighly porous activated carbon electrode that is prepared without the addition of adhesive materialswith an optimum physical activation time. The sago waste-based activated carbon was preparedwithout adhesive materials with different physical activation times of 0.5, 1.0, 1.5, 2.0 and 2.5 hours.The effect of the physical activation time is discussed in terms of the physical and electrochemicalproperties of the carbon electrodes. The evaluated physical properties of the electrode include thedensity, surface morphology, chemical element content, degree of crystallinity and surface area. Theelectrochemical properties of the supercapacitor cells were studied for specific capacitances on a twoelectrode system using the cyclic voltammetry method. The optimum specific capacitance of thesample electrode was 132 F g-1, which was achieved with an activation time of 2.5 hours.