SciELO - Scientific Electronic Library Online

vol.5 issue1Surface Modification of Polymeric Materials by Plasma TreatmentInfluence of Calcification Solution on in vitro Chitosan Mineralization author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Materials Research

Print version ISSN 1516-1439On-line version ISSN 1980-5373


MELO, L. et al. Electrochromic Properties of Sol-gel Coating of Nb2O5 and Nb2O5:Li+. Mat. Res. [online]. 2002, vol.5, n.1, pp.43-46. ISSN 1516-1439.

Thin solid films of Nb2O5 and Nb2O5:Li+ were prepared by the sol-gel process using the sonocatalytic method. The films reported here were prepared from a NbCl5 as precursor and butanol as solvent. Through the addition of lithium salt LiCF3SO3 to the precursor solution, films with different electrochemical performance were obtained. The electrochemical and optical responses of the films were determined from the cyclic voltammetry and chronoamperometry measurements using a 0.1 M LiClO4/PC as electrolyte. The electrochromic properties of the films were investigated using in situ spectroelectrochemical method. They exhibit a gray coloration under Li+ insertion with a reversible variation of the transmittance in the visible and near infrared range between 20% and 80%.

Keywords : electrochromism; Nb2O5; sol-gel.

        · text in English     · English ( pdf epdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License