POSITIVE ELECTRODE ACTIVE MATERIAL, METHOD FOR PERPARING THE SAME, POSITIVE ELECTRODE PLATE, AND BATTERY

A positive electrode active material, a method for preparing the same, a positive electrode plate, and a battery are provided. The positive electrode active material includes a ternary material and lithium manganese iron phosphate. A mass of the lithium manganese iron phosphate is represented by A, a total mass of the ternary material and the lithium manganese iron phosphate is represented by B, where A and B satisfy: 0