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Thin film counterelectrodes with high Li charge capacity for electrochromic windows

TitoloThin film counterelectrodes with high Li charge capacity for electrochromic windows
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2001
AutoriVarsano, F., Decker F., and Masetti E.
RivistaMonatshefte fur Chemie
Volume132
Paginazione83-95
ISSN00269247
Abstract

Ce-V mixed oxide films have been deposited by RF sputtering with the aim of increasing the Li charge capacity of counter electrodes in smart windows. Such mixed oxides have shown high transmittance and optical passivity in the visible region. After electrode pre-conditioning by cyclic voltammetry, a good electrochemical reversibility in LiClO4 - propylene carbonate electrolyte was observed, and large Li-charge capacity under galvanostatic charging (up to 50 mC · cm-2) has been measured. The electrode charge capacity decreased after prolonged insertion-deinsertion cycles, whereas the photoptic transmittance remained about constant. After 800 cycles the Li-charge capacity decreased to 40 mC · cm-2. The Li diffusion coefficient inside the films measured by electrochemical impedance and by galvanostatic titration ranged from 10-11 cm2 · s-1 to 10-13 cm2 · s-1. We observed that the Li charge capacity of the film electrodes is a function of the film deposition conditions, because it increased with the vanadium oxide concentration in the target and with the oxygen content in the sputtering atmosphere.

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cited By 3

URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-57249105096&doi=10.1007%2fs007060170147&partnerID=40&md5=2e9c6bd5d158a4b0b7d867ffd5a1e2f2
DOI10.1007/s007060170147
Citation KeyVarsano200183