Abstract:
Supercapacitors are energy storage devices that have many advantages, including
rapid charging and an unlimited lifespan. This research aims to evaluate the
potential of papaya stem bark biomass (KBP) as a raw material for carbon
electrodes production for supercapacitor cell applications. KBP Carbon electrodes
were made through a pre-Carbonization process for 3 hours at 200°C, chemical
activation using 0.3 M KOH as an activating agent, Carbonization process at
600°C, using N2 gas, and physical activation process at 700°C, 800°C and 900°C
using CO2 gas. The KBP-800 sample has the highest density shrinkage value,
which is 57.01%. The FTIR test results showed that the KP activated Carbon
contained the functional groups O-H, C-H, C C, C=O, C-O. XRD analysis
reveals that the Carbon electrode was semicrystalline characterized by peaks (002)
and (100) at angles 2 around 22° and 44°. The smallest Lc values and the largest
La values were owned by the KBP-800 samples is 9.558 nm and 30.327 nm.
According to SEM characterization, the KBP electrode exhibits a nanoflower
structure with meso- and macro-sized pores. EDX analysis indicates the presence
of elements, namely Carbon (C), Oxygen (O). Magnesium (Mg). Phosphorus (P),
Potassium (K), and Calcium (Ca). The KP-800 sample has the best supercapacitor
cell performance, as determined by CV and GCD analysis, with the best specific
capacitance values of 238 F/g and 264 F/g.
