SELF-DOPING NITROGEN-OKSIGEN-FOSFOR TERHADAP KARBON NANOFIBER BERASAL DARI KULIT UDANG WINDU UNTUK MATERIAL SUPERKAPASITOR
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Date
2023-07
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Elfitra
Abstract
Supercapacitors are renewable energy storage devices consisting of electrodes,
electrolytes, current collectors and separators. Electrodes are the main contributors
in supercapacitors because they are made of nano-scale materials that have high
surface area and porosity. This study utilized tiger prawn skin waste without and
with the addition of 0,3M, 0,4M, and 0,5M KOH with respective sample codes,
namely KU, KU-03, KU-04, and KU-05. The manufacture of carbon electrodes
was carried out by several processes, namely pre-carbonization process, chemical
activation with KOH activator, carbonization process using N2 gas at 600ºC and
physical activation using CO2 gas at 800ºC. The highest density shrinkage value is
owned by the KU-04 sample, which is 37,60%. The carbon electrode from tiger
prawn skin has a semicrystalline structure characterized by the presence of peaks
(002) and (100) at angles of 24°-25° and 45° which contains functional groups OH,
C-H, C≡C, C-N, C=O, P=O, C-O, and N-H. The nanofiber structure with the
highest number is owned by the KU-04 sample with the percentage of elements of
carbon, nitrogen, oxygen, and phosphorus each of 54.39%, 11,41%, 23,11%, and
2,54%. The isothermal adsorption-desorption of N2 from tiger prawn skin-based
carbon electrodes with KOH activation exhibits combined behavior of type I and
IV with the H4 hysteresis loop which shows the largest total specific surface area
and total pore volume in KU-04 of 526.175 m²g-1 and 0.371887 cm3g-1, with a
pore distribution of 2.8271 nm. Electrochemical analysis of supercapacitor cells
using the Cylic Voltammetry and Galvanostatic Charge-Discharge methods with
1 M H2SO4 electrolyte produced the highest specific capacitance values in the
KU-04 sample of 315 Fg-1 and 244 Fg-1, respectively. Based on the physical and
electrochemical properties of supercapacitor cells derived from waste tiger prawn
skin, increasing the amount of KOH to the carbon matrix can improve the
performance of supercapacitor cell electrodes.
Description
Keywords
Penaeus monodon, Self-doping, Carbon electrodes, Supercapacitor
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