ELEKTRODA KARBON DARI KULIT BATANG PEPAYA LIAR (CARICA PAPAYA L) DENGAN VARIASI SUHU AKTIVASI FISIKA SEBAGAI SEL SUPERKAPASITOR

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.