Tungsten trioxide electrochromic film is a new energy-saving material, which can also be said to be a new type of smart material. Such energy-saving film can be used for performances of high heat insulation, UV resistance and anti-glare. Therefore, the WO3 electrochromic film is more and more widely used in the fields of architecture, cars and airplanes. So, how can the tungsten trioxide electrochromic thin film be prepared?
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According to experts, the anode can be a platinum plate and the cathode is a quartz conductive glass. And the tungsten trioxide thin film can be prepared by constant current electrolysis (current density of 200μA/cm2) in a 0.5mol/L sodium tungstate solution (pH=2) at room temperature. The tungsten trioxide smart film prepared by electrolysis can be first dried under an infrared lamp and then thermostated at 350°C for 1h. In accordance with the X-ray diffraction analysis, the tungsten oxide electrochromic film is an amorphous material.
