Abstract

Novel graphitic carbon nitride quantum dots (CN-QDs) are anchored with V2O5 (VO) nanorods, and VO-CN nanocomposite materials are synthesized through a facile one-pot hydrothermal method. Owing to their considerable surface area, active sites, and characteristics related to quantum confinement, here, the gC3N4 nanomaterials were superseded by 0D CN-QDs. The prepared nanocomposite crystalline structure were studied by XDR technique, in which the strain of 0.59 % present in VO-CN NC material can influence or modulate the electrochemical reduction potentials of the prepared electrodes. The functional group and chemical composition are investigated using XRD, FT-IR and XPS studies. The morphology of VO-CN NC was investigated using FE-SEM and HR-TEM analysis, in which a nanorod-like morphology was observed. From the BET analysis, the average pore size of VO-CN NC is obtained to be 3.03 nm. The electrochemical behavior of VO-CN NC was demonstrated with the three-electrode and two-electrode asymmetric device setups with 2M KOH. The VO-CN NC exhibits an elevated behavior than pristine V2O5 nanorods due to the synergistic effect of V2O5 nanorods and CN-QDs. The VO-CN NC electrode delivers a specific capacity of about 284C/g at 10 mV/s and has good capacitive retention of 91.5 % after 5000 cycles. The device VO-CN NC//AC displays a specific capacity of 170C/g at 1 A/g. Furthermore, the device exhibits a high energy and power density of 60.48 Wh/Kg and 12776.47 W/kg. It can be concluded that the conductivity of the oxide matrix has been significantly improved by the inclusion of a carbon network (CN-QDs) and the electrode is demonstrated to be a potential electrode material for application in electrochemical energy storage devices.