Research Progress on Na₃V₂(PO₄)₃ Cathode Material of Sodium Ion Battery

Sodium ion batteries (SIBs) are one of the most potential alternative rechargeable batteries because of their low cost, high energy density, high thermal stability, and good structure stability. The cathode materials play a crucial role in the cycling life and safety of SIBs. Among reported cathode candidates, Na₃V₂(PO₄)₃ (NVP), a representative electrode material for sodium super ion conductor, has good application prospects due to its good structural stability, high ion conductivity and high platform voltage (~3.4 V). However, its practical applications are still restricted by comparatively low electronic conductivity. In this review, recent progresses of Na₃V₂(PO₄)₃ are well summarized and discussed, including preparation and modification methods, electrochemical properties. Meanwhile, the future research and further development of Na₃V₂(PO₄)₃ cathode are also discussed.