Positive electrode and rechargeable lithium battery including the same

A positive electrode for a rechargeable lithium battery, the positive electrode comprising:

• a current collector;
• and
• a positive electrode active material layer on the current collector,
• wherein the positive electrode active material layer comprises a positive electrode active material and a lithium-based additive,
• wherein the lithium-based additive comprises at least one of a compound represented by Chemical Formula 1-1, a compound represented by Chemical Formula 1-2, and a compound represented by Chemical Formula 1-3,
• wherein the positive electrode active material layer comprises a first portion adjacent to the current collector and a second portion adjacent to a surface of the positive electrode active material layer,
• wherein a weight of the lithium-based additive is in a range of about 1% to about 10% of a total weight of the positive electrode active material layer,
• wherein an amount of the lithium-based additive in the second portion is greater than an amount of the lithium-based additive in the first portion,
• wherein, in Chemical Formula 1-1, 1.1≤x≤2.5,
• wherein, in Chemical Formula 1-2, 1.1≤x2≤5.5, and
• wherein, in Chemical Formula 1-3, M comprises at least one of Ti, Zr, Mn, and Ni, 5≤x3≤7, 0<y≤0.5, 0<z≤0.5, 0<y+z+m<1, and 0≤m≤0.5.