Abstract:
Energy storage devices are an important aspect in overcoming the energy crisis
because of their renewable and environmentally friendly nature, one of the energy
storage devices is supercapacitors. The supercapacitor electrodes are derived from
candlenut shell biomass by going through several pre-carbonization processes,
chemical activation using 0.3 M KOH activator, 600°C carbonization using N2 gas,
and physical activation using CO2 gas with variations of 700°C, 800°C, and 900°
C. The result of mass shrinkage of candlenut shell carbon after the precarbonization
process was 24.46%. In testing the electrode density of the samples
TK-700, TK-800, and TK-900, the value decreased after the carbonization and
physical activation processes were carried out with values of 0.8902 gr/cm3, 0.8055
gr/cm3, and 0.9204 gr/cm3 respectively. This study shows that the temperature of
800°C is the optimum temperature to obtain a high capacitance value and candlenut
shell biomass which has the potential to be used as a carbon electrode for
supercapacitor cell applications.
