Journal
ELECTROCHIMICA ACTA
Volume 87, Issue -, Pages 341-347Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2012.09.047
Keywords
Electrochromism; NiO film; Ionic liquid; Electrochemical property
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Funding
- Key Science and Technology Innovation Team of Zhejiang Province [2010R50013]
- National Natural Science Foundation of China [51001089, 51271169]
- Fundamental Research Funds for the Central Universities [2011QNA4006]
- Ministry of Education of China
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Nanostructured nickel oxide (NiO) thin films were prepared by a simple electrodeposition in choline chloride-based ionic liquid followed by an oxidation in air. Uniform granules and some voids opened between these granules were presented in the polycrystalline NiO films deposited for 10 and 30 s, but the film became compact as the deposition time increased to 60 s. The optical transmittance of the film decreased with the increase of the film thickness. All the NiO films exhibit high coloration efficiency, fast electrochromic switching and good cycling durability. The ultra fast switching time (0.74 s and 0.88 s) and maximum coloration efficiency of 250 cm(2) C-1 were observed for the film deposited for 10 s. (C) 2012 Elsevier Ltd. All rights reserved.
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