Patent ID: 11888155
Assignee: SK ON CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A cathode for a lithium secondary battery, comprising:
a cathode current collector; and
a cathode active material layer comprising a plurality of active material layers sequentially disposed on the cathode current collector which include different types of cathode active material particles from each other,
wherein an active material layer closest to the cathode current collector among the plurality of active material layers has a DA of 0.5 μm or less,
wherein, in a 3D model of each active material layer showing a distribution of the cathode active material particles included in each active material layer, DA is an arithmetic average value of top 100 diameters of spheres when paths extending between the cathode active material particles and passing through both surfaces of the 3D model in a thickness direction are analyzed, a maximum diameter of a sphere capable of passing through each path is measured, and the diameters of the spheres are listed in a descending order.