Enhanced Electrochromic Properties by Using a CeO2 Modified TiO2 Nanotube Array Transparent Counter Electrode

doi:10.3724/SP.J.1077.2012.00074

Abstract

Abstract:

A new kind of electrochromic device composed of a CeO₂ modified TiO₂ nanotube array counter electrode and a working electrode of P3MeT film was reported. The counter electrode was fabricated by electrodepositing CeO₂ nanoparticles onto the walls of anodized TiO₂ nanotubes. The CeO₂ modified TiO₂ nanotube array counter electrode keeps a high transparency under working voltage. The charge capacity of CeO₂ modified TiO₂ nanotube array has an increase of 30% than that of un-modified TiO₂ nanotube array electrode. Compared with the electrochromic device with a TiO₂ nanotube array film electrode, the CeO₂modified TiO₂ nanotube counter electrode based EC device has a fast decoloration time of 0.8 s. The fast response attributes to the high effective surface area and the fast charge transportation along the nanotube walls.

Key words: CeO₂, TiO₂, nanotube, electrochromic, counter electrode

CLC Number:

TQ34

WEN Hao, LIU Zhi-Fu, YANG Qun-Bao, LI Yong-Xiang. Enhanced Electrochromic Properties by Using a CeO₂ Modified TiO₂ Nanotube Array Transparent Counter Electrode[J]. Journal of Inorganic Materials, 2012, 27(1): 74-78.

Figures/Tables 8

Fig. 1 Schematic diagram of the measuring setup for transmittance and electrochromic response tests

Fig. 2 Schematic diagram of electrochromic devices

Fig. 3 SEM images of (a) G-ATO and (b) G-ATO/CeO2

Fig. 4 Cyclic voltamatic curves of three different counter electrodes made from CeO2, G-ATO and G-ATO/CeO2 (v=0.1 V/s)

Fig. 5 Chronoamperograms of three different counter electrodes made from CeO2, G-ATO and G-ATO/CeO2

Fig. 6 Transmittance curves of three different counter electrodes made from CeO2, G-ATO and G-ATO/CeO2 in non-working status

Fig. 7 Transmittance of the electrochromic devices with different counter electrodes made from CeO2, G-ATO and G-ATO/CeO2 under the constant voltages of -1.5 V and +1.2 V, respectively

Fig. 8 Transmittance response of the electrochromic devices with time change

References 18

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Enhanced Electrochromic Properties by Using a CeO₂ Modified TiO₂ Nanotube Array Transparent Counter Electrode

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