In this work, the synthesis and characterization of the oil palm empty fruit bunch (OPEFB) activated carbon were studied for battery electrodes application. First, chemical activation carried out by variation concentrations and immersion time of NaOH and KOH. Then, the physical activation was studied using variation of activation temperature. The characterization of OPEFB activated carbon investigated on the surface morphology, surface area and the capacitance specific. Moreover, we designed, assembled and measured the electricity potential of the battery prototype. The activator solution of KOH 2 M showed the highest surface area of 354.25 m 2g -1, capacitance specific of 116.78 F.g -1, and potential of 1.17 V. Furthermore, the optimal immersion time was 18 hours with the highest surface area of 380.28 m 2g -1, capacitance specific of 96.57 F g -1, and the potential of 1.05 V. Finally, the optimal activation temperature is 900 oC which showed with the highest surface area 334.28 m 2g -1, capacitance specific of 96.41 F.g -1, and the potential of 1.12 V. Based on this report, OPEFB activated carbon can be used as the battery electrodes due to the carbon properties.

This study aims to investigate the effect of NaOH immersion time and concentration on the activation of carbon from Oil Palm Frond (OPF), specifically focusing on the surface morphology and characteristics as the electrodes to biobattery application. The method employed involves carbonization and activation with NaOH at various concentrations: 0.5 M, 1 M, 1.5 M, 2 M, and 2.5 M, along with different immersion times of 12, 18, 24, 30, and 36 hours. Subsequently, the activated carbon is analyzed using a Scanning Electron Microscope (SEM) to observe its morphology, and the Brunauer Emmett Teller (BET) method is utilized to determine the carbon surface area. Furthermore, a voltage test uses a multimeter to assess the electric potential properties. Another outcome of this study is developing a prototype bio-battery POWER. Activated carbon from oil palm frond (OPF) testing resulted in 1 M NaOH, giving the highest surface area of 336.493 m 2g -1, and immersion time at 30 hours gave the optimum result of 396,808 m 2g -1. At the same time, the biobattery electrical test voltage of 0,653 V at a concentration of 1 M and 0,902 V at 30 hours of immersion.