Hexagonal Tungsten Trioxide Applied for Transparent Thermal Insulation Material

Hexagonal tungsten trioxide is important for preparing transparent thermal insulation material such as WO3 film and WO3 coating. Also, it is a significant anodic material of Li-ion batteries. So, WO3 is more and more well-known. Well, do you know how to prepare hexagonal tungsten trioxide? Some researchers have successfully prepared single-crystal nanowires of hexagonal tungsten trioxide (h-WO3) in a large scale by a simple hydrothermal method without any templates and catalysts. The prepared h-WO3 nanowires are uniform with diameter of 25–50 nm and length of up to several micrometers.

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And it is found that the morphology and crystal form of the final products are strongly dependent on the amount of the sulfate and pH value of the reaction system. The electrochemical performances of the as-prepared h-WO3 nanowires as anodic materials of Li-ion batteries have also been investigated. It delivers a discharge capacity of 218 mAh/g for the first cycle. In addition, the cycle ability of the nanocrystals is superior to that of bulk materials, which implies the morphology and particle size have the influence on the electrochemical performances.

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