Recent Advances in Fast‐Charging Sodium‐Ion Batteries

Abstract Sodium‐ion batteries (SIB), stemming from the abundance of sodium resources and their cost‐effectiveness, have positioning them favorably a potential candidate for stationary energy storage and public electric vehicles. As an intermediary of the grid system and output terminals of the charging station, fast‐charging performance has actually become a crucial metric, which greatly relates to the charging station utilization and cost‐ and time‐efficient. Besides, the fast‐charging capacity is also relevant to the long‐term stable operation public transportation. Given the remarkable advancements in fast‐charging SIBs reported recently, a review about this topic and scope is timely and important at present. In this study, the bottlenecks of fast‐charging SIBs are first assessed, after that, a comprehensive overview of the employed strategies for improving the fast‐charging capacities of SIBs from three aspects: structures design, reaction mechanism regulation, and optimization of solvation structure and interfacial property is given. Finally, challenges and prospects for further research toward fast‐charging SIBs are proposed. The authors hope this review will provide a deep understanding of the design principles of fast‐charging SIBs and inspire more endeavors to conquer the practicability issue of SIBs in energy storage fields.