Positive electrode active material and the method for preparing the same, secondary battery, battery module, battery pack, and electrical device

Abstract

The present application provides a positive electrode active material and the preparation thereof, a secondary battery, a battery module, a battery pack, and electrical device. The positive electrode active material of the present application comprises a layered sodium composite oxide containing antimony having a chemical formula of Formula I, NaxMnaFebNicSbdLeO2 (I), in which 0.7<x≤1, 0<a, 0≤b, 0.1<c≤0.3, 0<d≤0.1, 0≤e, a+b+c+d+e=1, (b+c)/(a+d+e)≤1, and L is one or more selected from Cu, Li, Ti, Zr, K, Nb, Mg, Ca, Mo, Zn, Cr, W, Bi, Sn, Ge, Al, Si, La, Ta, P, and B. The layered sodium composite oxide containing antimony of the present application, by being doped with specific metal Sb, has high stability to water.

Dependencies are inferred from the claim text.