CD Skripsi
Pembuatan Elektroda Sel Superkapasitor Dari Limbah Biomassa Kulit Buah Aren
Carbon electrode is one of the main components contained in supercapacitor which plays a role in storing energy. Activated carbon electrodes made from waste biomass of palm rind with variations in the concentration of KOH activator have been fabricated. The initial step was started with a pre-carbonization process for 1 hour at 200ᵒC. Then the sample was mashed and sieved using a 53 mesh sieve. Chemical activation was carried out using potassium hydroxide (KOH) with various concentrations of 0.3 M, 0.7 M, 0.5 M and 0.9 M. The pellets was prepared using a Hydraulic press with a pressure of 8 tons. Furthermore, the carbonization process was carried out using N2 gas at 600ᵒC and physical activation was carried out using CO2 gas at temperature of 850ᵒC. The physical properties including density and electrochemical properties of the palm rind samples was analyzed using X-ray diffraction (XRD) and Cyclic Voltametry (CV) method. The results of the density measurement show that KA-09 sample has the highest density value of 0.582 g/cm3. XRD testing shows that the carbon electrode has a semicrystalline structure consisting of 2 peaks in the plane orientation of (002) and (100) at angles of 2θ around 24ᵒ and 44ᵒ. The results of XRD characterization also showed that KA-03 sample has the highest Lc value, namely 6.650 Å, while KA-09 sample has the lowest Lc value, namely 2.235 Å. The results of measuring electrochemical properties using Cyclic Voltametry show that KA-03 sample has the highest specific capacitance value of 184.242 F/g while KA-09 sample has the lowest specific capacitance value of 110.652 F/g. Palm rind is suitable as a supercapacitor cell electrode because it has the ability to store high energy.
Keywords: Palm rind, potassium hydroxide, carbon electrode and supercapacitor
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