Ion-conducting membranes based on gelatin and containing LiI/I-2 for electrochromic devices
Document Type
Article
Publication Date
1-1-2012
Abstract
Ionic conducting membranes of gelatin plasticized with glycerol and containing LiI/I-2 have been obtained and characterized by X-ray diffraction measurements, UV-Vis-NIR spectroscopy, thermal analysis and impedance spectroscopy. The transparent (80-90% in the visible range) membranes showed ionic conductivity value of 5 x 10(-5) S/cm at room temperature, which increased to 3 x 10(-3) S/cm at 80 degrees C. All the ionic conductivity measurements as a function of temperature showed VTF dependence and activation energy of 8 kJ/mol. These samples also showed low glass transition temperature of -76 degrees C. Moreover the samples were predominantly amorphous. The membranes applied to small electrochromic devices showed 20% of color change from colored to bleached states during more than 70 cronoamperometric cycles.
Keywords
Electrochromic devices, Gel polymer electrolytes, Gelatin, Ionic conductivity, Polymer electrolytes, Films, Plasticizer, Transglutaminase, Resonance, Glycerol, Spectra, Iodide, Liclo4, Raman
Divisions
PHYSICS
Publication Title
Molecular Crystals and Liquid Crystals
Volume
554
Publisher
Taylor & Francis
Additional Information
Department of Physics, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA