A mini review on cathode materials for sodium‐ion batteries

Abstract Sodium‐ion batteries are becoming potential solutions for replacement of batteries due to the abundance of sodium reserves and high recycling costs of lithium‐based batteries. Sodium‐based layered oxides are being widely explored as positive electrode material for sodium‐ion battery due to their high capacities and high energy densities. However, oxide‐based systems do suffer from thermal stability issues and exhibit low power density. On the other hand, polyanionic‐based compounds and Prussian blue analogues demonstrate appreciable thermal stabilities and are useful in high power density applications. This article reviews recent trends of these cathode materials.