Rapid microwave synthesis of molybdenum disulfide-decorated reduced-graphene oxide nanosheets for use in high electrochemical performance supercapacitors. (25th August 2022)

• Record Type: Journal Article
• Authors: Rosli, Nurul Hazwani Aminuddin; Lau, Kam Sheng; Winie, Tan; Chin, Siew Xian; Zakaria, Sarani; Chia, Chin Hua
• Is Part Of: Journal of energy storage. Volume 52:Part C(2022)
• Publication Date: 2022-08-25
• Subjects: 2D materials -- Reduced graphene oxide -- Metal sulfides -- Microwave -- Supercapacitor; Energy storage -- Periodicals; Energy storage -- Research -- Periodicals; 621.3126
• DOI: 10.1016/j.est.2022.104991
• Languages: English
• ISSNs: 2352-152X

Abstract

Abstract: Two-dimensional (2D) materials have great potential for various applications due to their unique electrochemical properties. In this study, we successfully synthesized molybdenum disulfide-reduced graphene oxide (MoS2 -rGO) composites using the microwave-assisted method at 140 °C for 30 min with different concentrations of ammonium tetrathiomolybdate, ((NH4 )2 MoS4 ). Morphology analysis of the composites revealed the distribution of Mo on the rGO sheets. The MoS2 -rGO electrode synthesized with 0.01 M (NH4 )2 MoS4 exhibited a tremendous specific capacitance of 561.3 F g −1 at current density 0.8 A g −1 along with a capacitance retention of 92% after 10, 000 cycles. Used in an asymmetric supercapacitor device, it demonstrated energy and power densities of 39.90 Wh kg −1 and 800 W kg −1, respectively. These results suggest MoS2 -rGO as an outstanding potential candidate for supercapacitor electrodes in energy storage applications. Highlights: The MoS2 -rGO composite was synthesized using a rapid microwave-assisted method. The synergistic effect between MoS2 and rGO to enhance the performance of electrodes An ASC device achieves a maximum energy and power density of 39.90 Wh kg −1 and 800 W kg −1