Transparent storage layers for H+ and Li+ ions prepared by sol-gel technique

Bruno Valla; Juan Carlos Lop Tonazzi; Marcelo A. Macedo; L. H. Dall'Antonia; Michel Andre Aegerter; M. A.B. Gomes; Luis O. Bulhoes

doi:10.1117/12.49213

1 December 1991 Transparent storage layers for H⁺ and Li⁺ ions prepared by sol-gel technique

Bruno Valla, Juan Carlos Lop Tonazzi, Marcelo A. Macedo, L. H. Dall'Antonia, Michel Andre Aegerter, M. A.B. Gomes, Luis O. Bulhoes

Author Affiliations +

Proceedings Volume 1536, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion X; (1991) https://doi.org/10.1117/12.49213
Event: San Diego, '91, 1991, San Diego, CA, United States

Abstract

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.

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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); https://doi.org/10.1117/12.49213

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