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SAXS Studies of TiO2 Nanoparticles in Polymer Electrolytes and in Nanostructured Films

Polymer electrolytes as nanostructured materials are very attractive components for batteries and for opto-electronic devices. (PEO)8ZnCl2 polymer electrolytes were prepared from PEO and ZnCl2. The nanocomposites (PEO)8ZnCl2/TiO2 themselves contained TiO2 nanograins. In this work, the influence of the TiO2 nanograins to the morphology and ionic conductivity of the nanocomposite was systematically studied by transmission small-angle X-ray scattering (SAXS) simultaneously recorded with wide-angle X-ray diffraction (WAXD) and differential scanning calorimetry (DSC) at the synchrotron ELETTRA. Films containing nanosized grains of titanium dioxide (TiO2) are widely used in the research of optical and photovoltaic devices. The TiO2 films prepared by CVD and e-beam evaporation were annealed in hydrogen atmospheres in the temperature range between 20°C and 900°C in order to study anatase-rutile phase transition at 740°C. Also, grazing-incidence small angle X-ray scattering (GISAXS) spectra for each TiO2 film were measured in reflection geometry at different grazing incident angles. Environment friendly galvanic cells as well as solar cells of the second generation are to be constructed with TiO2 film as working electrode and nanocomposite polymer as electrolyte.

SAXS/DSC/WAXD ; GISAXS ; polymer electrolyte ; nanostructured films of TiO2

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