Naslov
Nanostructure of Vanadium Oxide and V/Ce Oxide Films and the Influence of Li+Intercalation

Autori
Dubček, Pavo ; Turković, Aleksandra ; Lučić- Lavčević, Magdy ; Crnjak Orel, Zorica ; Bernstorff, Sigrid

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
207th Elestrochemocal Society Meeting : V1 - Nanostructured Materials for Energy Storage and Conversion : Meeting abstracts ; Abstract 1355 / Zaghib, K. ; Dodelet, J. ; Julien, C. ; Mcginn, P. ; West, W. - Pennington (NJ) : Cummings Printing Co., 2005, 37-37

Skup
Meeting of the Electrochemical Society (207 ; 2005)

Mjesto i datum
Quebec, Kanada, 15.05.2005. - 20.05.2005

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
GISAXS; sol-gel; V and V/Ce oxides

Sažetak
Vanadium oxide and new V/Ce oxide films on glass substrate were obtained by sol-gel process. The morphology of these nanostructured and porous films was studied by grazing-incidence small-angle X-ray scattering (GISAXS). The aim of the GISAXS study was to investigate the changes in grain sizes and porosity of vanadium oxide and V/Ce oxide at 38 and 55 at. % of V, due to the intercalation of Li+ ions. We found that the effects of the introduced Li are diverse for V and V/Ce oxides. While in the case of V oxide it resulted in both the grain size and distribution width reduction (4.3nm, half width 1nm) in the V/Ce oxide the size is increased to 3.4nm, but the distribution width is reduced to 1nm. Generally, Li introduction somehow reduces the difference in the V and V/Ce structure preferring the similar both grain sizes and the distribution widths, but also narrowing the latter. Therefore the surface contribution in V/Ce oxide is reduced, since its flatness is reduced by the presence of well defined grains. Although in a different size range, this is well supported by AFM results. V oxide surface is dominated by a grain like structure, while the surface of V/Ce oxide appears to be smooth, with the RMS surface roughness of 11 and 2 nm, respectively. In the case of the intercalated samples these values are changed to 6 and 8 nm for V and V/Ce oxide, respectively.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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