SODIUM-ION BATTERY, POSITIVE ELECTRODE PLATE FOR SODIUM-ION BATTERY, POSITIVE ACTIVE MATERIAL, BATTERY MODULE, BATTERY PACK, AND DEVICE

This application relates to a sodium-ion battery, a positive electrode plate for a sodium-ion battery, a battery module, a battery pack, and a device. The sodium-ion battery according to this application includes a positive electrode plate, a negative electrode plate, a separator, and an electrolytic solution. The positive electrode plate includes a positive active material. A molecular formula of the positive active material satisfies NaLiMFeO, M is a transition metal ion, 0.67