Recent Advances in Sodium Iron Sulfate Cathodes for Sodium-Ion Batteries: Crystal Structure, Synthesis, and Performance.

Sodium-ion batteries (SIBs) have shown promising application prospect in large-scale energy storage systems and low-speed electrical vehicle due to the rich abundance of sodium on earth, similar working principle with lithium-ion batteries, and potentially better low-temperature performance. Exploring low-cost and high-performance cathode materials is the key to promote the practical application of SIBs. Among various SIBs cathode materials, sodium iron sulfate (NFS) compounds stand out due to their stable three-dimensional (3D) framework structure, high operating voltage, cost-effectiveness, and environmental friendliness.

Recent Advances in Fast-Charging Sodium-Ion Batteries.

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.