Growth and Electrochemical Properties of Single-Crystalline V₂O₅ Nanorod Arrays
Journal Article
·
· Japanese Journal of Applied Physics Part 1 - Regular Papers Short Notes & Review Papers
OSTI ID:889539
Growth and electrochemical properties of single-crystalline vanadium pentoxide (V2O5) nanorod arrays were investigated. Vanadium pentoxide nanorod arrays were grown by electrochemical deposition, surface condensation induced by a pH change and sol electrophoretic deposition. Uniformly sized vanadium oxide nanorods with a length of about 10 ?m and diameters of 100 or 200 nm were grown over a large area with near-unidirectional alignment. Transmission electron microscopy (TEM) micrographs and electron diffraction patterns of V?O? nanorods clearly show the single-crystalline nature of nanorods fabricated via all three growth routes with a growth direction of [010]. The growth mechanisms of single-crystal V?O? nanorods have been discussed. Electrochemical analysis revealed that nanorod array electrodes possess significantly improved storage capacity and charge/discharge rate with approximately 5 times higher applicable current density than those of sol-gel derived films. Furthermore, for a given current density, the nanorod array electrode can intercalate up to 3.5 times higher concentration of Li? intercalation. The relationships between electrochemical property, nano- and microstructure, and growth mechanisms have been discussed.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 889539
- Journal Information:
- Japanese Journal of Applied Physics Part 1 - Regular Papers Short Notes & Review Papers, Journal Name: Japanese Journal of Applied Physics Part 1 - Regular Papers Short Notes & Review Papers Journal Issue: 1B Vol. 44
- Country of Publication:
- United States
- Language:
- English
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