Li+-intercalation electrochemical/electrochromic properties of vanadium pentoxide films by sol electrophoretic deposition

Thin films of orthorhombic V2O5 have been prepared by sol electrophoretic deposition (EPD) followed by post-treatment at 500 ◦C. Their electrochemical and optical performances have been investigated for possible applications in electrochemical/electrochromic devices. Li+-intercalation properties of the films have been explored in two voltage ranges: 0.4 to −1.1 V and 0.4 to −1.6 V versus Ag/Ag+, respectively. High capacities of over 300 mAh/g are acquired in the wider voltage range at a current density of 50 A/cm2 and moderate capacities of 140 and 110 mAh/g are obtained in the narrower voltage range at a current density of 25 and 50 A/cm2, respectively. Electrochemical measurements have shown that the