Abstract: V₂O₅ is a metal oxide electrode material with a layered structure and high theoretical specific capacitance. By changing the preparation method，crystal V₂O₅ micro-/nanomaterials with different morphologies can be prepared. To further improve the electrochemical performance of the V₂O₅ electrode material，this paper used V₂O₅ powder as the raw material to prepare the V₂O₅ precursor on the carbon cloth using the hydrothermal method. After annealing at 300 ℃ ，the V₂O₅ nanoparticles with an average diameter of 80 nm were prepared. The effect of different V₂O₅ powder addition and annealing temperature on the morphology of the product was discussed. The electrochemical performance of the annealed V₂O₅ nanoparticle carbon cloth electrode was tested. The results showed that the electrode had good electrochemical activity and cycle reversibility. When the current density was 1 A/g，the specific capacitance was 678. 6 F/g. It has better rate performance and lowers internal resistance. It can be applied as a supercapacitor electrode material.

Key words: V₂O₅ nanoparticles, specific capacitance, V₂O₅ carbon cloth electrode, hydrothermal method