KARAKTERISASI SIFAT FISIS DAN ELEKTROKIMIA SEL SUPERKAPASITOR DENGAN PENUMBUHAN NANOPARTIKEL PLATINUM DI ATAS PENGUMPUL ARUS

Abstract

Supercapacitor is composed of several components namely, electrolyte separator, current
collector, and carbon electrode. Manufacture of electrodes that make from raw fibres of oil palm
empty fruit bunches (STKKS) through a combination of chemical activation using KOH activator
with concentration variation of 0.3 M, 0.9 M and 0.6 M. The carbonization process was carried out at
a temperature of 600°C using the N2 gas and was continued with the physical activation process at a
temperature of 700°C with the use of CO2 gas. The growth of platinum nanoparticles above the current
collector can enhance the performance of supercapacitor cells. Characterization of the physical
properties of supercapacitor cell electrodes using Field Emission Scanning Electron Microscopy
(FESEM) showed that electrode with KOH concentration of 0.3 M has more porous and distributed
evenly for 0.6 M, 0.9 M. Moreover, the results of FESEM for current collectors show platinum
nanoparticle were found to grow evenly. X-ray diffraction studies for carbon electrodes indicated that
these electrodes has can semicrystalline state with angle of diffraction of 24° and 44° for planes
orientation of 002 and 100 respectively. Characterization of electrochemical properties using Cyclic
Voltametry (CV) showed that platinum nanoparticles growth above current collectors have the largest
specific capacitance value of 149.627 F/g with a concentration of 0.3 M.