Nanostructured polyethylene glycol-titanium oxide composites as solvent-free viscous electrolytes for electrochromic devices
Por:
Mendoza N., Paraguay-Delgado F., Hechavarría L., Nicho M.E., Hu H.
Publicada:
1 ago 2011
Resumen:
Composites of polyethylene glycol (PEG) and titanium oxide compounds have been prepared by sol-gel method using different molar ratio between PEG and titanium isopropoxide. Transmission electron microscope (TEM) images and UV-vis absorption spectra of these composites indicate that titanium oxide particles or clusters were formed inside the composite materials and their maximum sizes were between 1.8 and 7 nm for PEG:Ti molar ratio changing from 24:1 to 4:1. Fourier Transform Infrared spectroscopy analysis of the same PEG-Ti composites suggests the presence of tetragonal titanium oxide compounds and its association with ether oxygen atoms of PEG molecules. As lithium iodide salt was added into PEG-Ti composites, iodide ions were oxidized into iodine and tri-iodides and, at the same time, titanium oxide compounds should be reduced. Color change speeds of tungsten oxide thin films were significantly improved when PEG-Ti-Lil composites were used as electrolytes compared to salt-in-polymer
Filiaciones:
UNAM, Ctr Invest Energia, Temixco 62580, Morelos, Mexico
Centro de Investigación en Materiales Avanzados, Miguel de Cervantes 120, 31109, Chihuahua, Chih, Mexico
Centro de Investigación en Ingeniería y Ciencias Aplicadas, UAEM, Av.Universidad 1001, Cuernavaca, Morelos 62210, Mexico
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