V₂O₅ is suitable for lithium ion storage due to its unique layered structure. Compared with traditional cathode materials such as LiMn₂O₄, LiCoO₂ and LiFePO₄, V₂O₅ has the advantages of high theoretical specific capacity, excellent power density, low-cost and abundance, and has attracted extensive attention in the field of cathode materials for lithium-ion batteries. However, its low inherent conductivity and slow lithium ion diffusion coefficient cause the poor capacity retention and rate capability. In addition, repeated phase change will lead to the structural instability during the charge-discharge process, moreover, vanadium oxides can partially dissolve into electrolyte, which are detrimental to long-term cycling performance in electrochemical devices. Because of these restricting factors, it has been an important research hot spot for modifying the V₂O₅ inherent defects to improve the electrochemical performance of electrode materials. It will be possible for V₂O₅ cathode materials to exhibit excellent electrochemical performance by preparing nanostructured vanadium oxides to enlarge surface area and shorten the ion diffusion distance, and integrating with conductive materials and doping to enhance the electrical conductivity and cycle stability of materials. In this work, we introduce the improvement on vanadium oxides inherent defects from four aspects, including making nanostructured electrode materials, integrating with conductive materials, adjusting working voltage window and doping metal ions. The influence of various methods on the change of electrochemical performance is discussed as well.