Environment-friendly approach to rGO–TMD composite synthesis for use as a supercapacitor

• Published in: Bulletin of materials science 2024-09, Vol.47 (3), p.220, Article 220
• Main Authors: Chaturvedi, Ragini, Garg, Amit
• Format: Article
• Language: English
• Subjects: Carbon; Chalcogenides; Chemical synthesis; Chemistry and Materials Science; Climate change; Electrical resistivity; Electrochemical analysis; Electrochemical impedance spectroscopy; Electrode materials; Electrodes; Electrons; Energy storage; Engineering; Glassy carbon; Graphene; Graphite; Indian Materials Research Conclave 2023; Materials Science; Molybdenum disulfide; Morphology; Nanocomposites; Particle size; Potassium; Refluxing; Sulfuric acid; Supercapacitors; Synthesis; Transition metal compounds; Two dimensional materials; Urine
• ISSN: 0973-7669; 0250-4707; 0973-7669
• DOI: 10.1007/s12034-024-03310-4

Owing to their characteristics like fast charge–discharge rate, very long life, simple geometry and eco-friendly nature, supercapacitor is an emerging technology to fulfil the present and future requirements of the energy. The performance of a supercapacitor is derived from the composition and morphology of the electrode. 2D materials possess various excellent structural properties like surface area, flexibility in the atomic scale dimension and mechanical strength with high electrical conductivity. This makes them an entrusted material to be used as an electrode material. The teaming of 2D materials and layered transition metal dichalcogenides have been of great interest for electrode materials. In this study, the reduction of graphene oxide is done by an environment-friendly synthesis method using cow urine, and then, synthesizing the reduced graphene oxide (rGO) and transition metal dichalcogenides (TMD) composite using the refluxing method. The modified pencil graphite electrode (PGE) was functionalized using the above composite and the performance is comparable to that of glassy carbon electrode. Our main motive was to develop a low-cost, sustainable and highly effective MoS 2 –rGO/PGE, which is completely based on an environment and eco-friendly method using natural precursors. The prepared MoS 2 –rGO nanocomposite was characterized by XRD, SEM and EDX, which revealed the formation as well as its morphological scenario. MoS 2 –rGO/PGE is explored as electrode material by electrochemical characterization with the 3-electrode system through cyclic voltammetry and electrochemical impedance spectroscopy, which exhibit maximum specific capacitance with good cycle stability.