Sintesis Dan Karakterisasi Karbon Aktif Berbasis Limbah Batang Mawar Dengan Impregnasi Nikel Oksida Sebagai Elektroda Superkapasitor.

Abstract

The addition of nickel oxide (NiO) as an impregnation on activated carbon from rose stem waste, synthesized using the pyrolysis method before the activation process and the hydrothermal method after the activation process, is analyzed in this study. The activation process was carried out with NaOH. The characterization of LBM-AC-NiO was analyzed using Fourier Transform Infra-Red (FTIR), Scanning Electron Microscopy – Energy Dispersive X-ray Spectroscopy (SEM-EDX), and X-Ray Diffraction (XRD). Additionally, electrochemical tests were conducted in the form of Cyclic Voltammetry (CV) and Galvanostatic Charge-Discharge (GCD). Electrochemical tests were performed using a three-electrode system: glassy carbon as the working electrode, Ag/AgCl as the reference electrode, platinum wire as the counter electrode, and 1M Na2SO4 as the electrolyte. The characterization results showed the presence of C-O, C-H, C=C, O-H, and NiO bonds in the FTIR results. Furthermore, electrochemical performance was tested in Cyclic Voltammetry (CV) and Galvanostatic Charge-Discharge (GCD) with results indicating that the addition of NiO to activated carbon can increase the specific capacitance value to 361.91 F/g in LBM-AC-NiO4. Based on the results obtained, the synthesized rose stem waste material has the potential to be used as a supercapacitor electrode.