Reversible Incorporation of Lithium-Ions into Electrodeposited Layers of TiO2

Thin layers of titanium oxide were deposited electrochemically from potassium titanium oxalate solution on ITO glasses and on QCM sensor. Any treatment at elevated temperature caused mechanical damage of the layers. The thickness of the layers was estimated within 200 - 400 nm. Dry layers were able to incorporate and reversibly released lithium ions from LiClO4 in propylene carbonate; this process was apparent visually by occurrence of brownish color. The material could be used in an electrochromic window or similar device.