CATHODE ACTIVE MATERIAL, AND CATHODE AND LITHIUM SECONDARY BATTERY COMPRISING SAME

A positive electrode active material includes a lithium transition metal oxide including Ni in an amount of 60 at% or more among the transition metals excluding lithium, and is in a form of a single particle made up of one nodule or in a form of a pseudo-single particle that is a complex of 30 or fewer nodules. A proportion of a (003) plane with respect to a total surface area of the positive electrode active material is 40 % or less.