1D Layered Zinc Vanadate (Zn2V2O7) Nanobelts: Hydrothermal Synthesis and Supercapacitor Application

The potential commercial applications of ternary metal oxides in the field of electrochemical energy storage are receiving much attention nowadays due to their various oxidation states and unique morphologies. Zinc vanadate (Zn-V-O) has ample interest in the energy storage field due to its promising electrochemical properties. The crystal structure and synthesis process of zinc vanadates can have a major impact on electrical conductivity and ion intercalation behaviour. A simple one step hydrothermal approach was employed to prepare monoclinic zinc vanadate (Zn2V2O7) nanobelts, which are explored as potential applications as supercapacitor electrodes. Through extensive structural, morphological, and compositional characterisation techniques, the formation of Zn2V2O7 nanobelts is confirmed. Additionally, the synthesised Zn2V2O7 nanobelts have been employed as an electrode material in supercapacitor (SC) applications, demonstrating a high specific capacitance of 426.5 F g−1 at 1 A g−1. Furthermore, the electrodes achieve the maximum energy density of 53 Wh kg – 1 at a power density of 363 W kg−1 with 85.5% retention capacity after 10000 cycles for the assembled asymmetric coin cell device within a 1.6 V window. With these advantageous features, the Zn2V2O7 nanobelts electrode materials exhibit great potential for energy storage devices.