V3O7·H2O nanorods were prepared via one-step solvothermal method using V2O5 as raw materials and characterized by SEM,XRD,EDS,XPS and FTIR.The influence of screen-printing technology on the electrochemical performance of electrode was investigated using V3O7·H2O nanorods as electrode material,and the electrode was further assembled into a supercapacitor and its electrochemical performance was evaluated.The results showed that the specific capacitance of the screen-printed electrode reached 268.0 F/g at a current density of 0.3 A/g,with a capacitance retention maintained at 85.9％after 5000 charge/discharge cycles,significantly improved compared with those of smeared electrode with 246.0 F/g and 68.0％,respectively.This performance improvement was attributed to the regular ink structure arrangement of screen printing.Moreover,the assembled coin supercapacitor exhibited excellent electrochemical performance with a specific capacitance of 134.2 F/g at 0.5 A/g and capacitance retention of 91.2％after 5000 charge/discharge cycles.And the power density reached as high as 4125.0 W/kg when the energy density was 22.0 W·h/kg.
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