Browsing by Author "Awitdrus, Awitdrus"

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    KARBON AKTIF BERBASIS LIMBAH IJUK AREN (ARENGA PINNATA) DAN APLIKASINYA SEBAGAI ELEKTRODA SEL SUPERKAPASITOR
    (perpustakaan UR, 2021-07) Pakpahan, Metha Melyanty; Awitdrus, Awitdrus
    The activated carbon electrode of a supercapacitor cell based on palm fiber has been successfully fabricated. This research aims to determine the effect of carbonization temperature on the density and specific capacitance values of activated carbon supercapacitor cells made from palm fiber. The process of preparation of supercapacitor electrode cells started with pre-carbonization using an electric oven at temperature of 100-250 oC. The chemical activation was performed using a 0.3M ZnCl2 activator. The carbonization process was carried out using N2 gas environment with temperature variations of 500 oC, 550 oC and 600 oC. The physical activation was done using CO2 gas at a temperature of 700 oC. The density of the carbon electrode decreases by 7.92% at 500 oC, 9.43% at 550 oC and 10.09% at 600 oC after carbonization-physical activation process. The sample with a temperature of 600 oC results the highest specific capacitance as high as 101 F/g.
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    PEMANFAATAN LIMBAH IJUK AREN (ARENGA PINNATA) SEBAGAI MATERIAL ELEKTRODA SEL SUPERKAPASITOR
    (perpustakaan UR, 2021-07) Puspita, Sintya Dewi; Awitdrus, Awitdrus
    Supercapacitor electrodes made from Palm fiber were prepared by carbonization and activation process which consist of several steps such as pre-carbonization, milling,sieving, chemical activation, pelletization, and carbonization-physical activation. Chemical activation was performed using potassium hydroxide (KOH). KOH concentration on the activation process of palm fiber charcoal varied as much as 0,2 M, 0,3 M and 0,4 M. The activated carbon was made through the pre-carbonization using an electric oven at temperature of 100-250 0C. The carbonization process was conducted in N2 gas environment at 600 0C and followed by physical activation at a temperatur of 700 0 C using CO2 gas for 1 h. The physical property of electrodes analyzed is its density. The electrochemical properties of the electrodes were explored using a two-electrode system while the capacitive properties of the electrodes was determined using cyclic voltammetry. The electrochemical properties of the electrodes showed excellent capacitive properties of a supercapacitor cell, with very high specific capacitance of 162,99 F/g.