Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10267555 | Electrochemistry Communications | 2005 | 6 Pages |
Abstract
Vanadium oxide nanotubes (VOx-NTs) were obtained as the main product in a sol-gel reaction followed by hydrothermal treatment from V2O5 precursors and primary amines. The material has a considerable large distance between the layers (ca. 3.5Â nm), a wide inner (15-40Â nm) and outer diameter (60-100Â nm), and the open tube ends which are favorable for the magnesium ion insertion. VOx-NTs are a new kind of material with a unique nanostructured morphology, which can electrochemically insert/deinsert magnesium ions reversibly from the cyclic voltammogram. AC impedance (EIS) demonstrated that Mg2+ diffusion into the nanotubes is faster than polycrystalline V2O5 during intercalation Mg2+ into the cathodes. X-ray photoelectron spectroscopy (XPS) and X-ray powder diffraction (XRD) results gave the mechanism of Mg2+ insertion into the nanotubes, however, the specific capacity of the rechargeable magnesium is lower than that of lithium.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Lifang Jiao, Huatang Yuan, Yijing Wang, Jiansheng Cao, Yongmei Wang,