CD Skripsi
Pengaruh Suhu Karbonisasi Pada Karbon Aktif Yang Berasal Dari Limbah Kulit Bengkuang (Pachyrhizus Erosus L,) Sebagai Bahan Elektroda Superkapasitor
Electrodes are one of the supercapacitor components that can increase its specific
capacitance. This studyaims to optimize the performance of supercapacitor cells
using the carbon electrodes derived from jicama bean peel biomass waste by
varying the carbonization temperature. The process of making carbon electrodes
begins with preparation of activated carbon powder, followed by the precarbonization
process at a temperature of 250 0C for 2 hours 30 minutes and then
chemically activated using ZnCl2 as an activator with a concentration of 0.5M.
Activated carbon powder was converted into solid coins-shaped electrodes using a
hydraulic press. The carbon electrodes were treated in a carbonization process
with various temperatures of 550 0C, 600 0C and 650 0C, and then physically
activated by flowing CO2 gas at a temperature of 850 0C. Density, structure and
specifik capacitance were analyzed based on its density shrinkage, x-ray
diffraction and cyclic voltammogram measurements. Characterization of the
physical properties of the carbon electrodes showed that the density of the sample
carbonized at 600 0C (JP-600) has the highest density shrinkage percentage of
43.8%. The microstructure characterization showed that the carbon electrode has a
semicrystalline structure characterized by the presence of peaks (002) and (100) at
2θ angles around 240 and 450. The highest specific capacitance value was
confirmed in sample JP-600 at 179 F g-1 in a constant current density of 1.0 A. g-1.
Furthermore, sample JP-600 also has a maximum energy density as high as 12.60
Wh kg-1 at an optimal power density of 105.86 Wh kg-1. It can be concluded that
the carbonization temperature of 600 0C is the best temperature for making carbon
electrodes from jicama peel to be applied as a supercapacitor cell electrode.
Keywords: Jicama peel, carbonization temperature, activated carbon, electrode
material, supercapacitor.
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