Sol-Gel derived CeO2:TiO2 coatings for electrochromic devices
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Thin films of mixed CeO2-TiO2 with different Ce/Ti mole ratios were prepared following an alcohol based sol-gel route via the spin coating technique using mixed inorganic-organic [CeCl3.7H2O and Ti(OPr)4] precursors. Ion storage capacity for films obtained from aged sols was observed to be high. Enhanced titanium oxide content improved the insertion capacity of the corresponding films as was evident from inserted charge determined by multiple step chronoamperometric measurements. Electrochemical, optical, structural and thermal performances showed the suitability of the films in an all solid state electrochromic (transmissive) device with tungsten trioxide (WO3) as electrochromic material and a conductive polymeric electrolyte based on lithium.
KeywordsTiO2 CeO2 Polymeric Electrolyte CeCl3 Spin Coating
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