
Tungsten Trioxide (WO3), as an N-type semiconductor material with good mechanical stability, photoelectric effect and electrochromic characteristics, is favored in the field of energy storage and used by researchers at home and abroad to replace cobalt in lithium-ion batteries. With the gradual decline of subsidies for new energy vehicles and the raid on Covid-19 in 2019, the shortage of cobalt resources and high costs have become increasingly prominent. Therefore, getting rid of dependence on cobalt has become an important direction…