Positive electrode plate and lithium ion battery

A positive electrode plate, comprising:

• a positive electrode current collector;
• and
• a positive electrode active material layer disposed on the positive electrode current collector,
• wherein the positive electrode active material layer comprises a first sub-layer and a second sub-layer, the first sub-layer being an outermost sub-layer of the positive active material layer, and the second sub-layer being disposed between the positive electrode current collector and the first sub-layer,
• the first sub-layer comprises a first positive electrode active material, the second sub-layer comprises a second positive electrode active material, and the first positive electrode active material is one or more of a ternary positive electrode material having a monocrystalline or quasi-monocrystalline structure, and a coating-modified material thereof,
• the ternary positive electrode material has a molecular formula of Lix1(Nia1COb1Mc1)1-d1Nd1O2-y1Ay1, wherein M is one or two of Mn and Al;
• N is selected from the group consisting of Mg, Ti, Zn, Zr, Nb, Sr, Y, Al, and combinations thereof;
• A is selected from the group consisting of F, Cl, S, and combinations thereof;
• 0.95≤x1≤1.05, 0<a1<1, 0<b1<1, 0<c1<1, a1+b1+c1=1, 0≤d1≤0.1, and 0≤y1≤0.1,
• the coating-modified material comprises a coating on the ternary positive electrode material having the molecular formula of Lix1(Nia1Cob1Mc1)1-d1Nd1O2-y1Ay1, and the coating is selected from the group consisting of a carbon coating, a graphene coating, an oxide coating, an inorganic salt coating, a conductive polymer coating, and combinations thereof.