Calibration of varying MoS2 amount with dual fabrication GCN/CQDs for supercapacitor’s electrode and strengthening of the energy parameters

Abstract

A heptazine form of graphitic carbon nitride (h-g-CN) and Carbon Quantum Dots (CQDs), each was obtained through thermal polymerization procedure and furthered their nano-ranged duo-composite as g-CN/CQDs through hydrothermal method. The influence of different amounts of MoS2insertions was studied on this duo after making its trio recipe (g-CN/CQDs/MoS2) as a super-capacitive working electrode for energy storing capability. After the ample characterization of the composites, these were tested for electrochemical applications.During the optimized study in a three-electrode system, it was found that CQDs and g-C3N4in 1:2 (fixed) by varying MoS2(30 %) shows the specific capacitance as 445.4F/g at 2 mV/s in 1 M H2SO4with cyclic stability of 89.3 % even after 10,000 cycles. Theenergy density and power density were observed as 37.5 Wh/kg and 404.19 W/kg respectively, at1 A/g.In a two-electrode system with specific capacitance of GCN/CQDs/30 % MoS2as 122.5F/g at 0.1 A/g.