Growth and Electrochemical Properties of Single-Crystalline V2O5 Nanorod Arrays
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Accession number;05A0303274
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| Title;Growth and Electrochemical Properties of Single-Crystalline V2O5 Nanorod Arrays |
| Author;
TAKAHASHI K
(Univ. Washington, Wa, Usa)
LIMMER S J
(Univ. Washington, Wa, Usa)
WANG Y
(Univ. Washington, Wa, Usa)
CAO G
(Univ. Washington, Wa, Usa)
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Journal Title;Jpn J Appl Phys Part 1
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Journal Code:G0520B
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ISSN:0021-4922
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VOL.44;NO.1B;PAGE.662-668(2005)
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| Figure&Table&Reference;FIG.7, REF.36 |
| Pub. Country;Japan |
| Language;English |
| Abstract;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 .MU.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 V2O5 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 V2O5 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. (author abst.) |
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