Ahmad Zulian, Markus Diantoro, Muhammad Hafidhuddin Karim, Nandang Mufti, Aripriharta Aripriharta, Thathit Suprayogi, Sunaryono Sunaryono
The increasing demand for high-performance and environmentally friendly renewable energy storage devices has prompted research on supercapacitor technology. Several types of materials used for electrode fabrication are carbon, metal oxides, and conductive polymers. Carbon has a high specific area, high porosity, and high conductivity, so it has the potential to be developed into a supercapacitor material. reduced graphene oxide rGO is a derivative of carbon material if it is used as a supercapacitor electrode material, the capacitance is less than optimal. In this study, rGO was modified with the addition of sulfur ions (S) which functioned to increase the ionic conductivity and form reduced Sulfonate Graphene Oxide (rSGO). rSGO was composited with Activated Carbon (AC) and Carbon Black (CB) to increase the surface area and electrical conductivity. Synthesis of the rSGO-AC-CB composite using the blending method with variations in the molarity of Sulfur 0, 0.4, 0.5 and 0.6 M. The rSGO-AC-CB composite was deposited using the doctor blade method on aluminum substrate. The rSGO-AC-CB composites were characterized by XRD to determine crystal size, SEM-EDAX to determine morphology, and Charge-Discharge to determine the electrochemical properties. Based on the results of XRD pattern analysis, it was found that the highest intensity peak of rSGO was at an angle of 22° and had a crystal size of 64.7 nm. Identification of SEM images on samples of rSGO and rSGO-AC-CB composites resulted in porosity of 72% and 70%, respectively. To determine the electrochemical performance of the electrode, the specific capacitance and the optimum energy density at 0.5 M molarity were 21.65 Fg-1 and 36.75 Wh.kg-1. The increase in Sulfur concentration is directly proportional to the specific capacitance produced by the rSGO-AC-CB composite electrode. © 2025 American Institute of Physics Inc.. All rights reserved.
Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Jl. Semarang 5, Malang, 65145, Indonesia; Department of Electrical Engineering, Faculty of Engineering, Universitas Negeri Malang, Jl. Semarang 5, Malang, 65145, Indonesia; Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Palangka Raya, Palangka Raya, Indonesia; Center of Advanced Materials for Renewable Energy (CAMRY), Universitas Negeri Malang, Malang, Indonesia; CV. Yotta Aksara Energi, Perumahan Bukit Cemara Tidar, Blok G10-2, Sukun, Malang, 65149, Indonesia
