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1 December 1991 Transparent storage layers for H+ and Li+ ions prepared by sol-gel technique
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Thin layers of mixed oxides CeO2 - TiO2 and CeO2 - ZrO2 with molar ratio 1:1 have been prepared by sol-gel process using the dip-coating technique. The precursor sols consist of a mixture of nitrate ammonium cerium salt [Ce(NH4)2 (NO3)6], zirconium propoxide or tetraisopropyl orthotitanate, and ethanol. The thickness of the multilayer films is typically 300 nm after densification at 450 degree(s)C. Their use as transparent H+ and Li+ ions storage electrode (counter electrode) for electrochromic devices is studied by electrochemical voltammetry, impedance, and optical spectroscopies. They typically have an optical transmission of 80% in the visible range, do not color after ions insertion, and show good electrochemical stability. These layers also have been tested in complete, all solid state cell having the configuration glass/ITO/EC/electrolyte/CeO2 - TiO2/ITO/glass. The electrochromic layer (EC) was either WO3 or polytoluidine. The protonic electrolyte was a cellulose-polyacetate polymer and the lithium electrolyte was PEO-LiN(SO2CF3)2. Their electrochemical, optical, and lifetime performances are reported.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Bruno Valla, Juan Carlos Lop Tonazzi, Marcelo A. Macedo, L. H. Dall'Antonia, Michel Andre Aegerter, M. A.B. Gomes, and Luis O. Bulhoes "Transparent storage layers for H+ and Li+ ions prepared by sol-gel technique", Proc. SPIE 1536, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion X, (1 December 1991);

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