Electrochemical supercapacitors have become prominent energy storage devices due to their excellent capacitance behavior, unparalleled power and energy density, and excellent cycle stability.Tungsten trioxide (WO3) has the advantages of various shapes, high theoretical specific capacitance, environmental friendliness, and low cost. It is a promising electrode material. However, its low conductivity (10-5-10-6 S cm-1) limits its wide application. Doping or dispersing WO3 with highly conductive carbon materials is a solution to overcome these shortcomings.

In recent years, as a highly sensitive material, Tungsten Trioxide (WO3) has many advantages, such as short response and recovery time, appropriate response temperature, easy measurement and control, and low price. It can be used in the military and national defense fields, and has attracted people's concern.That's all thanks to its gas sensing property.

Tungsten Trioxide (WO3), as a material with high gas sensitivity, high sensitivity and short response time, can be used as a gas sensor, and has been widely used in life and industry.

Tungsten Trioxide (WO3) thin film is a kind of functional material with large transmittance change, good reversibility, low relative price, long life, non-toxicity and environmental protection, and it is the earliest and most widely used electrochromic material. The application of this electrochromic material is hidden in our daily life. For example, it can be made into smart windows, which can save energy, dim light, control heat load and other functions. Therefore, in order to study the properties of Tungsten Trioxide thin films, researchers have continuously improved their preparation methods, such as preparing WO3 thin films by electrodeposition, which has become a research hotspot in recent years. The following is a general procedure for preparing Tungsten Trioxide thin films by electrodeposition method.