期刊
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
卷 204, 期 5, 页码 1281-1285出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssa.200674310
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The present work investigates lithium insertion into highly ordered nanotubular layers of TiO2 and its electrochromic effects. The nanotubes were formed by anodization of titanium in 1 M (H3PO4) + 1 M (NaOH) + 0.5wt% HF electrolyte at 20 V. This leads to nanotubular layers with a thickness of 1 +/- 0.1 mu m, individual tube diameter of 100 +/- 10 nm and a tube wall thickness of 10 +/- 2 nm. The cathodic behavior of tubes in the as formed amorphous phase and annealed to anatase were studied in a solution of 1 M LiClO4 in acetonitrile. Cyclic voltammograms and potential step experiments combined with reflectance measurements show for anatase nanotubes a well defined uptake potential for Li+ and a very strong and reversible electrochromic effect, while on the other investigated TiO2 structures the effects were much less pronounced. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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