Synthesis and Electrochromic Properties of Crystalline 3D Urchin-Like Nanostructures

Abstract:

Novel 3D (three-dimensional) urchin-like WO_2.72 nanostructures were prepared by a template-free hydrothermal synthetic route using W(CO)₆ and ethyl alcohol reagents. The detailed morphology and crystallinity were dependant on the synthesis temperature and synthesis time. The potential use of WO_2.72 nanourchins as a cathode electrode for electrochromic devices was assessed. The WO_2.72 electrochromic films exhibited a rapid switching response time (coloring time ~5 s, bleaching time ~1.6 s), outstanding high coloration efficiency (~116 cm²/C), and durability in an acidic electrolyte. This performance was attributed to the high diffusion coefficient [~6.43×10-9 cm²/s (in the intercalation)] of the urchin-likeWO_2.72 with a high surface area to volume ratio and high crystallinity

• Periodical: Advanced Materials Research (Volume 683)
• Pages: 307-313
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.683.307
• Online since: April 2013
• Authors: Jin Joo Jung, Do Hyung Kim
• Keywords: Electrochromic Device, Three-Dimensional Nanostructures, Tungsten Oxide

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DOI: 10.1016/j.ijhydene.2010.10.011