Sodium?ion batteries (SIBs) have the advantages of rich resources and low cost and supply risk.Therefore,they are regarded as a new generation of electrochemical energy storage devices with great potential.At present,vanadium pentoxide (V₂O₅) has gradually become a research hotspot of cathode materials for SIBs because of its high working voltage and theoretical capacity. However,the disadvantages of V₂O₅ cathode material,including low ion diffusion coefficient,low conductivity,and structural instability caused by repeated ion intercalation/deintercalation,have limited its application in SIBs.This paper analyzed the crystal structure and sodium storage mechanism of V₂O₅ and summarized the research progress of V₂O₅ cathode material in SIBs through modification methods such as morphology control,crystal structure modification,chemical pre?insertion,and composition with other materials.Finally,the paper prospected the development trend of V₂O₅ electrode material.