Electrochemical analysis of graphene/Mo9Se11 nanocomposites towards energy storage application

• Published in: Journal of materials science. Materials in electronics 2018-05, Vol.29 (9), p.7885-7892
• Main Authors: Balasubramanian, V., Celina Selvakumari, J., Dhanalakshmi, J., Ahila, M., Pathinettam Padiyan, D.
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Charge transfer; Chemistry and Materials Science; Comminution; Diffraction; Diffraction patterns; Electrochemical analysis; Electrochemical impedance spectroscopy; Energy storage; Graphene; Materials Science; Nanocomposites; Optical and Electronic Materials; Raman spectra; Spectrum analysis
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-018-8788-7

This paper essentially analyses graphene/Mo 9 Se 11 nanocomposites routes to supercapacitor applications which is one of the prominent devices for high power storage. Graphene and Mo 9 Se 11 are coupled together by attrition followed by ultrasonification. The reduction of graphene oxide to graphene as well as the coupling of graphene with Mo 9 Se 11 and the formation of their nanocomposites is confirmed through X-ray diffraction pattern, FTIR spectra and Raman spectra analysis of these materials. The surface morphology of the entire samples is imaged through SEM while their electrochemical performances are analysed by cyclic voltametry and electrochemical impedance spectroscopy. The nanocomposite, having three parts of Mo 9 Se 11 and one part of graphene, displayed the higher areal capacitance of 438 mF at a scan rate of 5 mV s −1 . Finally, the solution resistance and charge transfer resistance are obtained from EIS measurements and reported.