Lithium-ion insertion in anodic TiO2 nanotubes resulting in high electrochromic contrast

被引：69

作者：

Hahn, Robert ^{[1
]}

Ghicov, Andrei ^{[1
]}

Tsuchiya, Hiroaki ^{[1
]}

Macak, Jan M. ^{[1
]}

Munoz, Andres G. ^{[1
]}

Schmuki, Patrik ^{[1
]}

机构：

[1] Univ Erlangen Nurnberg, LKO, WW4, Dept Mat Sci, D-91058 Erlangen, Germany

来源：

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2007年 / 204卷 / 05期

关键词：

D O I：

10.1002/pssa.200674310

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页码：1281 / 1285

页数：5

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