Chemical route synthesis of nanohybrid Mo-V Oxide and rGO for high-performance hybrid supercapacitors

High-performance hybrid supercapacitors (HSCs) have been developed by combining two different electrode materials with wide potentials and long cycling stabilities. To develop high-performance HSCs, molybdenum vanadium oxide (MVO) was hybridized with graphene oxide (GO). The system of hydrothermal chemical pathways was used to synthesize the MVO/rGO (MVOG) nanohybrid material. The optimal MVOG achieves the highest specific capacity of 714.85 C/g compared to the bare MVO of 270.73 C/g at a sweep rate of 2 mV/s. The HSC was fabricated with two electrodes, namely, optimal MVOG and rGO as cathode and anode, respectively. The HSCs exhibit a maximum capacity of 185.06 C/g, with an operating potential of 1.5 V in 2 M KOH, with a maximum energy and power density of 38.55 Wh/kg and 2434.38 W/kg, respectively. The investigation conducted in this study reveals that the hybridization of MVO with GO enhances the physiochemical and electrochemical properties. The prepared MVOG electrode shows a 3-fold increase in supercapacitive efficiency compared to the MVO electrode. Different nanohybrids using ternary metal oxides with rGO can be developed by the same chemical route and hybridization method.