No.3

A study on the physical and electrochemical properties of

V₂O₅ nanofibers synthesized by electrospinning

De Pham-Cong1, Kyun Ahn1, Fukai Shan1, Ha-Anh Dao2,Chae-Ryong Cho^*

1Department of Nano Fusion Technology, Pusan National University, Miryang 607-706

2 Pohang University of Science and Technology, Pohang, Gyongsangbuk-do 791-708

Abstract

            

Vanadium pentoxide (V₂O₅) nanofibers have interesting as materials of electrode for lithium ion batteries. In this study, we present the physical and electrochemical properties of V₂O₅ nanofibers synthesized by using electrospinning method. To fabricate V₂O₅ nanofibers, solution is consists of vanadium acetylacetonate as sol and  Polyvinypyrolydone gel. After fabricate V₂O₅ nanofibers, annealing process was conducted at 500^oC to make only pure V₂O₅ nanofibers. The surface morphology and structure were measured by field emission scanning electron microscope (FE-SEM), x-ray diffraction (XRD) and Raman spectroscopy. From the analysis of FE-SEM, XRD and Raman spectra on V₂O₅ nanofiber, the diameter and crystal structure of V₂O₅ nanofibers were measured 100~200 nm with polycrystal structure. And the surface area of V₂O₅ nanofiber was measured by  Brunauer Emmett Teller (BET). Electrochemical properties of the synthesized products as electrodes in capacitor device were also studied using cyclic voltammetry.

Keywords: electrospinning, V2O5, cyclic voltametry