Nickel-based lithium metal composite oxide, preparing method thereof, and lithium secondary battery including a positive electrode including the same

摘要

It is a nickel-based lithium metal composite oxide containing secondary particles including aggregates of primary particles and having a nickel content of 50 mol% or more, wherein the secondary particles are large secondary particles having a particle size of 10 μm or more and small particles having a particle size of 5 μm or less. Disclosed are a nickel-based lithium metal composite oxide comprising secondary particles, wherein the nickel content of the secondary particles is greater than the nickel content of the small secondary particles, a method for manufacturing the same, and a lithium secondary battery containing a positive electrode including the same.