Recent Progress on Na₃V₂(PO₄)₂F₃ Cathodes for Na-Ion Batteries

Sodium vanadium fluorophosphate (Na₃V₂(PO₄)₂F₃) is considered as one of the most promising candidates for high-voltage Na-ion batteries cathodes due to the merits of high theoretical specific capacity, high energy density, high output voltage and rapid ion diffusion. However, the sluggish electron transfer kinetics and tremendous structural stress during repeated electrochemical processes restrict the further development and application. In this review, we presented recent progress on the development of Na₃V₂(PO₄)₂F₃, i.e., the synthetic methods and modification strategies (micro-nano structure fabrication, carbon coating, element doping and battery composition optimization), and also gave the corresponding future outlook.