Yellow tungsten oxide, or tungsten trioxide, can be used as a cathode electrochromic material on the smart heat insulation window glass. So, these glasses will have excellent heat insulation effect, thereby reducing the air conditioning refrigeration cost in the hot summer, and also achieving the purpose of energy conservation and environmental protection.
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For the preparation of electrochromic film of nano particle size tungsten trioxide, experts said that hydrothermal method can produce high performance nanostructure tungsten trioxide film. But, the high temperature and high pressure conditions limit the hydrothermal method application in the field of large area electrochromic film. Besides, although the electrodeposition method has a good application prospect in the preparation of large-area electrochromic films, its poor stability makes the prepared films unable to meet the needs of commercial applications. Therefore, experts are still exploring ways to prepare a large-area tungsten trioxide electrochromic film with good stability and many other good properties.
