Narrow band-gap cathode Fe3(PO4)2 for sodium-ion battery with enhanced sodium storage

Abstract In recent years, the development of cathode materials for sodium-ion batteries is very rapid. This work provides the Fe3(PO4)2 micromaterials fabricated by the solvothermal method for sodium-ion battery cathode. The structure and the electronic conductivity were investigated by the first-principle. Sodium-ion battery exhibits excellent capacity of 223.0 mA h g-1 at the current density of 25 mA g-1after eleven cycles. This reveals that the Fe3(PO4)2 micromaterials will be a remarkably promising cathode candidate for sodium-ion batteries.