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Issue 46, 2011
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Electrochromism of rutile nanowires, vertically aligned along the [001] direction, due to alkali metal ion intercalation

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Abstract

Rutile nanowires were grown along the [001] direction and perpendicular to the fluorine doped tin oxide coated glass substrate (R) by a solvothermal process using titanium isopropoxide as the precursor in acidic solution. The edge length of the nanowires obtained in isopropyl alcohol is ten times less than that of the nanowires obtained in water. Due to the high ionic diffusion rate along the rutile [001] direction and good optical transmittance, R was used as an electrochromism electrode. When −2 V was applied, the color of the electrode became blue with a 60% change in the transmittance for 30 s due to the cathodic polarization potential in LiClO4/PC electrolyte (where PC is propylene carbonate). The lithium ion intercalated/extracted densities of R, P25-coated and rutile nanowires-coated electrodes are 138.6/129.1 mC cm−2, 93.6/83.2 mC cm−2 and 31.7/15.9 mC cm−2 respectively. After 50 cycles, the Relectrode still performs very well. Furthermore, a large amount of sodium cation intercalation into TiO2 was observed for the first time at −1.0 V. According to these results, the Relectrode is a promising candidate to be a multi-function device.

Graphical abstract: Electrochromism of rutile nanowires, vertically aligned along the [001] direction, due to alkali metal ion intercalation

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Publication details

The article was received on 04 Jul 2011, accepted on 14 Sep 2011 and first published on 27 Oct 2011


Article type: Paper
DOI: 10.1039/C1JM13084F
Citation: J. Mater. Chem., 2011,21, 18738-18743
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    Electrochromism of rutile nanowires, vertically aligned along the [001] direction, due to alkali metal ion intercalation

    M. Yang, T. Chen, Y. Wang, H. Chiu and C. Lee, J. Mater. Chem., 2011, 21, 18738
    DOI: 10.1039/C1JM13084F

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