Violet tungsten oxide may be applied for producing thermal insulating glass, which has a wide application in the fields of building and automobile. So, the preparation of violet tungsten oxide powder is attracting attention. And there are different preparation processes, including APT wet hydrogen direct reduction method and tungstic hydrogen reduction method. Violet tungsten oxide powder may be used in thermal insulation materials due to its excellent thermal insulation properties and high visible light transmittance. And therefore, it is widely used in building heat insulation films and automotive heat insulation films.
Violet tungsten oxide also has a very high chemical activity, and therefore it can enhance electron conductivity. Since the material has a small internal resistance and excellent lithium ion diffusibility, the use of nano grain size violet tungsten oxide as a battery negative electrode enables charging and discharging of a large current. In particular, it has excellent discharge characteristics in a low-temperature environment, and has a rate characteristic equal to or higher than that of a double-layer capacitor (EDLC) discharge even at -40°C.
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