Lithium manganese oxide positive active material for lithium ion secondary battery and lithium ion secondary battery including the same

Abstract

Provided are a lithium manganese oxide positive active material for a lithium ion secondary battery and a lithium ion secondary battery including the same. The lithium manganese oxide positive active material includes a spinel lithium manganese oxide of three or more types of particles having different sizes mixed therein, wherein first type particles have an average diameter of 5 μm or greater, second type particles have an average diameter of 1 μm or less, third type particles have an average diameter of 200 nm or less, and the average diameter of the second type particles is greater than that of the third type particles.

Dependencies are inferred from the claim text.