✦ LIBER ✦

The electrochromic process in non-stoichiometric nickel oxide thin film electrodes

✍ Scribed by F. Decker; S. Passerini; R. Pileggi; B. Scrosati

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 362 KB
Volume: 37
Category: Article
ISSN: 0013-4686
DOI: 10.1016/0013-4686(92)85220-f

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✦ Synopsis

Abatraet-Non-stoichiometric nickel oxide thin films are very interesting novel electrochromic electrodes for the realization of optical displays and windows of relevant technological importance . However, the exact nature of the electrochromic process in these electrodes is not yet fully clear . In this work we attempt to reach a more precise understanding of this process by examining in detail the electrochemical properties of the intercalation process of lithium ions in the nickel oxide host structure . Investigation based on cyclic voltammetry, potentlometry, impedance analysis, optical transmittance, stress measurements, scanning electron microscopy and secondary ion mass spectroscopy, suggest that the intercalation of lithium induces phase changes in the nickel oxide structure, namely a first phase related to the initial injection of lithium (with which is associated a bleaching process) and a second phase related to an excess of inserted lithium (with which is associated an opposite, darkening process) .

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