Synthesis and characterization of self-assembled nanofiber-bundles of V2O5: their electrochemical and field emission properties

Abstract

High-quality self-assembled V(2)O(5) nanofiber-bundles (NBs) are synthesized by a simple and direct hydrothermal method using a vanadium(v) hydroxylamido complex as a vanadium source in the presence of HNO(3). The possible reaction pathway for the formation of V(2)O(5) NBs is discussed and demonstrated that HNO(3) functions both as an oxidizing and as an acidification agent. V(2)O(5) NBs are single-crystals of an orthorhombic phase that have grown along the [010] direction. A bundle is made of indefinite numbers of homogeneous V(2)O(5) nanofibers where nanofibers have lengths up to several micrometres and widths ranging between 20 and 50 nm. As-prepared V(2)O(5) NBs display a high electrochemical performance in a non-aqueous electrolyte as a cathode material for lithium ion batteries. Field emission properties are also investigated which shows that a low turn-on field of ∼1.84 V μm(-1) is required to draw the emission current density of 10 μA cm(-2).

V2O5 and its Carbon‐Based Nanocomposites for Supercapacitor Applications

“…Accordingly, no sharp reduction peaks can be detected in two successive CV cycles as observed in Figure d. Thus, it can be concluded that the electrochemical reversibility is to large extent is restored around a voltage range of 4.0–2.0 V which is ideal for lithium ion battery applications while further widening of potential window (4.0 V–1.5 Vs or less) leads to more quasi‐rectangular shaped CV curves with supercapacitive signatures ,…”

Electrospun porous vanadium pentoxide nanotubes as a high-performance cathode material for lithium-ion batteries

“…These advantages are beneficial to improve electrochemical performance of the electrode. Dewangan et al synthesized V 2 O 5 nanofiber-bundles by a hydrothermal method using a vanadium hydroxylamido complex as a vanadium precursor [14]. O'Dwyer et al synthesized VO x nanotubes through a surfactant-assisted templating method [15].…”

In situ Synthesis of V2O3‐Intercalated N‐doped Graphene Nanobelts from VOx‐Amine Hybrid as High‐Performance Anode Material for Alkali‐Ion Batteries

“…41‐1426) due to reduction of V 2 O 5 by organic amines during hydrothermal treatment ,. The Fourier transform infrared spectroscopy (FTIR) in Figure S1 reveals the presence of N−H bonds (3060 cm −1 ), C=C stretching mode of the quinoid ring (1585 cm −1 ) and benzenoid ring (1488 cm −1 ), as well as V−O,, suggesting the formation of inorganic‐organic VO x /3‐phenylpropylamine. Figure c and Figure S2a depict the typical scanning electron microscope (SEM) images of the hydrothermal product disclosing a nanobelt morphology with a width of 300–600 nm and thickness of 20–40 nm.…”