Sodium-ion battery positive electrode material, preparation method thereof and sodium-ion battery

The invention provides a sodium-ion battery positive electrode material, a preparation method thereof and a sodium-ion battery. The sodium battery positive electrode material is of a P3 phase structure, and the sodium battery positive electrode material comprises nickel, manganese and aluminum. According to the sodium battery positive electrode material provided by the invention, aluminum is doped into a specific P3 phase structure, so that the sodium battery positive electrode material has more excellent gram volume and rate capability. 本发明提供了一种钠电正极材料及其制备方法和钠离子电池。所述钠电正极材料为P3相结构，所述钠电正极材料中包括镍、锰和铝。本发明提供的钠电正极材料，在特定的P3相结构中掺入铝，从而具有更为优异的克容量和倍率性能。