Study on the optical and electrochemical performance of V₂O₅ with various morphologies

The morphology of V₂O₅ has an important influence on its optical properties and electrochemical performance. Herein, four types of vanadium pentoxide structures such as nanowires, layer-by-layer, solid spheres and hollow spheres, were prepared by the combination of the hydrothermal synthesis and calcinations. Various techniques including FT-IR, UV-vis and Raman were used to measure the optical properties. Cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) measurements were used to evaluate the electrochemical properties of the samples. The optimal electrochemical performance was obtained from V₂O₅ hollow spheres. The experimental results indicated that nanowires exhibited higher transmittance in the near-IR region and V₂O₅ hollow spheres were an ideal electrode material for supercapacitors.