作者: Dafni Chatzikyriakou , Natacha Krins , Bernard Gilbert , Pierre Colson , Jennifer Dewalque
DOI: 10.1016/J.ELECTACTA.2014.05.139
关键词: Intercalation (chemistry) 、 Inorganic chemistry 、 Electrochromism 、 Amorphous solid 、 Mesoporous material 、 Raman spectroscopy 、 Thin film 、 Lithium 、 Cyclic voltammetry 、 Materials science 、 Chemical engineering
摘要: The intercalation and de-intercalation of lithium cations in electrochromic tungsten oxide thin films are significantly influenced by their structural surface characteristics. In this study, we prepared two types amorphous via the sol-gel technique: one dense mesoporous order to compare response upon de-intercalation. According chronoamperometric measurements, Li+ intercalates/de-intercalates faster film (24s/6s) than (48s/10s). electrochemical measurements (cyclic voltammetry chronoamperometry) also showed worse reversibility for compared film, giving rise important trapping remaining coloration film. Raman analysis that provides more accessible various W-O bonds intercalation. On contrary, first insertion de-insertion selectively reacts with a few preferentially intercalates into pre-existing crystallites form stable irreversible LixWO3 bronze.