The recent advances of NASICON-Na3V2(PO4)3 cathode materials for sodium-ion batteries

NASICON (super ionic conductor)-type Na3V2(PO4)3 (NVP) has been widely studied as a very promising cathode material for sodium-ion batteries (SIBs) due to its high theoretical specific capacity, high voltage platform, good chemical stability, its unique three-dimensional (3D) open crystal structure, and the de/intercalation of sodium ions during charge/discharge. However, the high Na+ diffusion ability of NVP is accompanied by the large bulk structure and poor electronic conductivity, which leads to poor electrochemical performance in terms of rate capability and cycling stability and thus impedes its practical application. Herein, the research development of NVP sodium ion cathode materials are reviewed in recent years. Based on the crystal structure and ion migration mechanism of NVP materials, the sodium storage mechanism and theoretical capacitance of NVP materials are introduced, and the effects of different preparation methods on the electrochemical properties of NVP materials are summarized and compared. The modification research strategies to improve the electrochemical performance of NVP electrode materials are mainly discussed, including carbon material modification, ion doping, and material Nano-crystallization. Finally, some remarks are made on the challenges and prospects for the future development of NVP cathodes.