Tungsten Oxide Powder Applied for WO3-TiO2 Electrochromic Film

Tungsten oxide powder for preparing a WO3-TiO2 electrochromic film is an electrochromic material that is very promising in information, electronics, energy, energy-saving building and national defense. WO3 is also a function material we are more familiar with. Some experts have successfully prepared a stable tungsten oxide gel with tungstic acid as a raw material, and prepared a tungsten trioxide electrochromic thin film doped with TiO2 by a sol-dip-coating method and an electrophoretic deposition method.

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Wherein, the expert performed crystal phase analysis on the obtained gel. Specifically, after the TiO2 doped tungsten trioxide gel was heat-treated at 200°C, the sample was milled to about 300mesh, and the phase analysis was carried out by a D/MAX-IIA X-ray diffractometer. The results are shown in the above figure. As can be seen from the figure, WO3-TiO2 heat-treated at 200°C is amorphous. In addition, experts say that the gel polymer electrolyte using the PMMA system can be used to assemble an all-solid-state electrochromic device with better bleaching effect, but it requires a higher driving voltage and a longer response time.

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