Synthesis of Zn3V2O8 nanoplatelets for lithium-ion battery and supercapacitor applications

Abstract

Zn₃V₂O₈ nanoplatelets were successfully synthesized using a hydrothermal method. The formation of the Zn₃V₂O₈ nanoplatelets was explained via splitting, exfoliation and self-aggregation mechanisms. FESEM revealed the nanoplatelet morphology with a thickness of 27.9 nm. HRTEM imaging confirmed the crystalline nature of the Zn₃V₂O₈ nanoplatelets, and the SAED pattern clearly indicated that the prepared sample was Zn₃V₂O₈. The prepared Zn₃V₂O₈ nanoplatelets were further studied for their potential application in Li-ion batteries and supercapacitors. The discharge capacity in the second cycle was 558 mA h g⁻¹ at 100 mA g⁻¹. The Zn₃V₂O₈ nanoplatelets exhibited a maximum specific capacitance of 302 F g⁻¹ at a scan rate of 5 mV s⁻¹. Furthermore, a Zn₃V₂O₈ electrode retained about 98% of its initial specific capacitance after 2000 cycles. The described Zn₃V₂O₈ nanoplatelets were found to be a highly suitable electrode material for energy storage applications.