Abstract
Vanadium pentoxide (V(2)O(5)) exhibits broad application prospects in the field of battery cathode materials due to its layered structure and high theoretical specific capacity. However, its inherent low electrical conductivity and structural instability during cycling severely restrict its electrochemical performance. To overcome these bottlenecks, cobalt (Co)-doped V(2)O(5) materials were successfully prepared via a hydrothermal synthesis method in this study. Characterization confirmed that Co ions were successfully incorporated into the V(2)O(5) lattice, which effectively expanded the interlayer spacing and improved the electronic conductivity of the material. Electrochemical test results showed that compared with pure V(2)O(5), the Co-V(2)O(5) sample demonstrated excellent hydrogen evolution reaction and oxygen evolution reaction performances, with lower overpotentials and Tafel slopes. As a catalyst for driving water electrolysis, the sample exhibited a cell voltage of 1.38 V at 10 mA cm(-2) and excellent long-cycle stability.