Electrospun V2O5 nanofibers as high-capacity cathode materials for zinc-ion batteries

Abstract

Vanadium pentoxide (V2O5) has attracted significant attention in recent years as a cathode material for aqueous zinc-ion batteries (AZIBs). Its unique layered structure allows for reversible intercalation of various multivalent ions, including Zn2+.

This paper proposes a sol–gel electrospinning method for preparation of vanadium pentoxide nanofibers, followed by thermal treatment in air. The composition and structure of the obtained powders were verified by X-ray diffraction, energy-dispersive X-ray elemental analysis, and X-ray photoelectron spectroscopy, while the morphology of the samples was investigated by scanning electron microscopy. The electrochemical properties and performance of the electrode materials based on V2O5 nanofibers were studied using cyclic voltammetry, galvanostatic charge–discharge, and electrochemical impedance spectroscopy methods. V2O5 electrodes demonstrate high specific capacity (357 mA h g−1 at 0.05 A g−1) and good long-term cyclic stability.