Positive electrode for rechargeable lithium battery, method of preparing the same, and rechargeable lithium battery including the same

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

• a positive active material, comprising
• small particle diameter monolith particles having a particle diameter of about 1 μm to about 8 μm and comprising a first nickel-based lithium metal oxide, and
• large particle diameter secondary particles having a particle diameter of about 10 μm to about 20 μm and comprising a second nickel-based lithium metal oxide,
• wherein the small particle diameter monolith particles comprise nickel and aluminum,
• wherein an X-ray diffraction peak intensity ratio (I(003)/I(104)) of the positive electrode is greater than or equal to about 3.

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

• a positive active material, comprising
• small particle diameter monolith particles having a particle diameter of about 1 μm to about 8 μm and comprising a first nickel-based lithium metal oxide, and
• large particle diameter secondary particles having a particle diameter of about 10 μm to about 20 μm and comprising a second nickel-based lithium metal oxide,
• wherein the large particle diameter secondary particles have a form in which two or more primary particles are aggregated, and the primary particles have a particle diameter of about 20 nm to about 500 nm,
• wherein an X-ray diffraction peak intensity ratio (I(003)/I(104)) of the positive electrode is greater than or equal to about 3.