Layered metal oxides are favored by researchers because of their simple manufacturing method and high specific capacity. Similar to lithium batteries, layered oxide cathode materials are also promising cathode materials for commercial use in sodium ion batteries.

(2) Prussian blue

Prussian blue frame structure allows sodium ions to be embedded and released quickly, with excellent structural stability and rate performance. Although Prussian blue material shows great application prospect, there are still some problems in its commercial application. The main reason is that the existence of water of crystallization and vacancy will affect the properties of materials. The water of crystallization will hinder the diffusion of sodium ions, and the electrochemical performance of the battery will be further reduced due to the decomposition of the water, and the rate performance will be reduced. Vacancies will lead to the deterioration of electronic conductivity of materials, and the crystal frame of materials is easy to collapse in the cycle process due to the existence of vacancies. Because this scale production still faces bigger difficulty at present.

(3) Polyanion

The polyanionic material has an open frame which enables it to have an open diffusion channel of sodium ions and a high operating voltage. At the same time, the strong covalent bond makes the material better thermal stability and oxidation resistance at high voltage. At present, the polyanionic materials are mainly phosphate, fluorophosphate and sulfate.

TOB NEW ENERGY can provide a full set of sodium-ion batteries materials for Na-ion battery research and manufacturing. please contact for more information.