The motivation behind the formation of V2O5@g-C3N4 materials for electrodes having nanostructure comes from the mounting energy requirements of upcoming generation. In present study, we examined the route of fabrication and efficiency evaluation of supercapacitors employing g-C3N4 (g-CN) nanosheets decorated with vanadium oxide (V2O5) nanoparticles (NPs). The V2O5@g-CN was manufactured by hydrothermal method, resulting in a material that exhibited excellent long-term stability during cycling and higher Cs. Using CV, Cs of g-CN, V2O5 and the V2O5@g-CN were investigated as 331, 730, and 951 F g−1, correspondingly at 10 mV s−1. GCD investigation was employed to evaluate Cs of g-CN, V2O5, and V2O5@g-CN at 1 A g−1 as 369, 764 and 994 F g−1, correspondingly. The fabricated V2O5@g-CN nanocomposite shows remarkable stability over 5000 cycles. The greater electrochemical efficiency of V2O5@g-CN was associated to several variables, including existence of multiple valence states of vanadium ions, a large surface area and rapid ion transportation. The results suggest that applying V2O5@g-CN as an electrode in energy preservation appliances could be a viable and economical option.