Electrochemical Lithium Intercalation/Deintercalation of Single-Crystalline V[sub 2]O[sub 5] Nanowires

Abstract

This paper reports on the electrochemical lithium intercalation/deintercalation of single-crystalline V2O5V2O5 nanowires that were synthesized by a two-step approach including a hydrothermal process and a post-calcinating treatment. Techniques of X-ray diffraction, field-effect scanning electron microscopy, transmission electron microscopy, and high-resolution transmission electron microscopy were used to characterize the structure, morphology, and composition of the as-prepared nanowires. It was found that V2O5V2O5 nanowires were of high purity with the diameter of 50–200nm50–200nm and the length up to 100μm100μm . The electrochemical lithium intercalation/deintercalation of the V2O5V2O5 nanowires was investigated by cyclic voltammograms and galvanostatic charge-discharge methods. The results showed that the single-crystalline V2O5V2O5 nanowires exhibited high initial discharge capacity of 351mAhg−1351mAhg−1 , indicating their potential application as the cathode materials of rechargeable lithium-ion batteries.