LAUSR

Vanadium-based material is currently one of the most suitable materials for constructing aqueous ZIB. In this work, commercial V2O5 has also been used for comparing the battery’s performance with the V2O5-rGO (reduced graphene oxide) nanocomposite products. The commercial V2O5 showed poor cycle stability and low specific capacity (30 mA h g−1 specific capacity was observed after 200 cycles), while the V2O5 nanobelts/rGO composite showed good performance. After applying a current density of 0.1 A g−1, V2O5 nanobelts/rGO showed an outstanding cycle stability and high specific capacity of 135 mA h g−1 after 200 cycles. In the rate performance, when a current density of 1 A g−1 was applied, a high specific capacity of 113 mA h g−1 was obtained. Compared with the commercial V2O5, V2O5 nanobelts/rGO composite depicts superior performance as an electrode material for aqueous ZIB. Graphical abstract A nanocomposite comprising of V2O5 nanobelts and rGO is studied in the context of aqueous ZIB. A nanocomposite comprising of V2O5 nanobelts and rGO is studied in the context of aqueous ZIB.