A method for manufacturing a cathode electrode includes forming a composite cathode active material by providing a first cathode active material. The first cathode active material comprises a lithium- and manganese-rich (LMR) cathode active material. The method includes forming an outer layer including a second cathode active material on the first cathode active material to form a composite cathode active material. The second cathode active material comprises an NMX cathode active material including lithium, and nickel and manganese with a molar ratio in a range from 3/7 to 8/2.

A positive electrode material, a positive electrode plate, a battery cell, a battery, and an electric apparatus are described. The positive electrode material includes a layered lithium-containing metal oxide, and the layered lithium-containing metal oxide is represented by a general formula Li.sub.aL.sub.xNi.sub.bCo.sub.cMn.sub.dM.sub.(1bcd)O.sub.eN.sub.f, where an L ion is a cation having a radius larger than a radius of a Li ion, M includes at least one of Mg, Zr, Al, B, Ta, Mo, W, Nb, Sb, and La, and N includes at least one of F, S, and P, where 0<a<2, 0b<1, 0c<1, 0d<1, 0<b+c+d1, 0<e2, 0f<2, and 0<x0.8. The technical solutions provided in the embodiments of this application help to improve performance of the positive electrode material and performance of the battery cell.

A positive electrode material, a positive electrode plate, a battery cell, a battery, and an electric apparatus are described. The positive electrode material includes a layered lithium-containing metal oxide, and the layered lithium-containing metal oxide is represented by a general formula Li.sub.aL.sub.xNi.sub.bCo.sub.cMn.sub.dM.sub.(1bcd)O.sub.eN.sub.f, where an L ion is a cation having a radius larger than a radius of a Li ion, M includes at least one of Mg, Zr, Al, B, Ta, Mo, W, Nb, Sb, and La, and N includes at least one of F, S, and P, where 0<a<2, 0b<1, 0c<1, 0d<1, 0<b+c+d1, 0<e2, 0f<2, and 0<x0.8. The technical solutions provided in the embodiments of this application help to improve performance of the positive electrode material and performance of the battery cell.