Sodium layered oxides are a type of sodium-ion battery cathode material with a layered crystal structure, usually with the general formula NaxMO₂ (M being a transition metal, such as Ni, Mn, Fe, etc.). Their structural feature is that there are sodium ion layers embedded between the transition metal oxide layers, which facilitates the insertion and extraction of sodium ions.
In the battery industry, sodium layered oxides are one of the core cathode materials for the development of sodium-ion batteries, and they have received extensive attention due to their strong sodium storage capacity, high energy density, and relatively mature preparation process. Their performance directly affects the capacity, cycle life, and cost of sodium-ion batteries, and are one of the key materials for achieving low-cost, large-scale energy storage applications.
