Eletrólitos poliméricos a base de agar e nanopartículas de NiO.

Abstract

The present work proposes to study and characterize polymer electrolyte based agar and the influence of the addition of nickel oxide nanoparticles to possible use in electrochromic device. Agar is a natural polymer that presents an interesting properties such as mechanical properties and optical properties. Besides agar were used glycerol as plasticizer and formaldehyde to promote the crosslinking reactions in the polymer. As a proton source an acetic acid was used. The nanoparticles of NiO were added in order to improve the ionic conductivity of the electrolyte. Electrochemical impedance spectroscopy was used in order to study the ionic conductivity of the filmes and the influence of the nanoparticles of NiO. Also thermal analysis (DSC and TG) were realized in order to study the vitreous transition of the electrolyte. The transparency of the films was study using UV-Vis measurements. X-ray was measurement in order to study the amorphous character of the electrolyte. Scanning electronic microscopy was used to study the morphology of the films and atomic force microscopy to study the roughness of the films. The results shows that the addition of nanoparticles of NiO improves the ionic conductivity of the films and show the possibility to use this electrolyte in electrochromic devices.