Cathode Active Material for Lithium Secondary Battery and Lithium Secondary Battery Comprising the Same

摘要

The present invention relates to an anode active material for lithium secondary battery and a lithium secondary battery including the same, and more specifically it relates to an anode active material for lithium secondary battery in which the a lithium ion diffusion path in the primary particles is formed to exhibit specific directivity, and a lithium secondary battery including the same.;The cathode active material for lithium secondary battery of the present invention has a lithium ion diffusion path exhibiting specific directivity in the primary particles and the secondary particles, thus not only the conduction velocity of the lithium ion is fast and the lithium ion conductivity is high but also the cycle characteristics are improved as the crystal structure hardly collapses despite repeated charging and discharging.

主权项

1. A cathode active material for lithium secondary battery, which is a cathode active material having a layered structure containing a transition metal and is secondary particles formed by aggregation of primary particles, wherein
an aspect ratio of the primary particles is 1 or more and an a-axis direction that is a lithium ion diffusion path in the primary particles is formed to be parallel to a longer side of the primary particles.