In:
Journal of Nanoscience and Nanotechnology, American Scientific Publishers, Vol. 6, No. 11 ( 2006-11-01), p. 3572-3576
Abstract:
We report electrochromic and electrochemical properties of a WO 3 -Ta 2 O 5 nanocomposite electrode that was fabricated from co-sputtering. Transmission electron microscopy (TEM)images of the WO 3 -Ta 2 O 5 nanocomposite electrode
revealed that morphology of the WO 3 film was changed by incorporation of Ta 2 O 5 nanoparticles, and their chemical states were confirmed to be W 6+ and Ta 5+ oxides from X-ray photoelectron spectroscopy (XPS). The introduction of Ta 2 O 5 to the WO 3 film played a role in alleviating surface roughness increase during continuous potential cycling; whereas the surface roughness of the WO 3 film was increased from ca. 3.0 nm to ca. 13.4 nm after 400 cycles, the roughness increase on the WO 3 -Ta 2 O 5 was significantly reduced to 4.2 nm after 400 cycles, as investigated by atomic force microscopy (AFM). This improvement of the stability by adding Ta 2 O 5 may be responsible for the enhanced electrochemical and optical properties over long-term cycling with the WO 3 -Ta 2 O 5 nanocomposite electrode.
Type of Medium:
Online Resource
ISSN:
1533-4880
DOI:
10.1166/jnn.2006.17985
Language:
English
Publisher:
American Scientific Publishers
Publication Date:
2006
SSG:
11
