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|Title:||Two methods of obtaining sol gel Nb2O5 thin films for electrochromic devices|
|Author(s):||Avellaneda, César O.|
Aegerter, Michel A.
|Year of Publication:||1998|
|OPUS Source:||Journal of materials science. - 33. 1998, 8, S. 2181-2185|
|SWD key words:||Sol-Gel-Verfahren|
|DDC notations:||620 Engineering and machine engineering|
|Publikation type:||Journal Article|
|Abstract:||Nb2O5 coatings prepared by the sol-gel route using the dip coating technique with sols prepared from alkoxide or chloroalkoxide (two different methods: sonocatalytic and conventional) precursors are a promising alternative for WO3 electrochromic coatings. The crystalline films (TT phase) sintered at 560 and 600 degrees C are transparent and present a deep blue colour under Li+ ion insertion. Electrochemical stability is excellent as these systems are fully reversible and stable and no change in colour, amount of charge exchanged and corrosion effect could be observed after 2000 voltammetry cycles between 2 and - 1.8 V versus Ag. The electrochemical and optical properties of these coatings have been determined as a function of sintering temperature. The superficial structure was visualized by atomic force microscopy (AFM) and scanning electron microscopy (SEM) and the Li+ diffusion coefficient was determined for both kinds of coatings.|
|Link to this record:||urn:nbn:de:bsz:291-scidok-24884|
|Date of registration:||3-Dec-2009|
|Faculty:||SE - Sonstige Einrichtungen|
|Department:||SE - INM Leibniz-Institut für Neue Materialien|
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