Patent ID: 11870064
Assignee: SK ON CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A multilayer cathode comprising:
a current collector;
a first cathode mixture layer formed on at least one surface of the current collector; and
a second cathode mixture layer formed on the first cathode mixture layer,
wherein the first cathode mixture layer includes a cathode active material and a first conductive material, and the second cathode mixture layer includes the cathode active material and a second conductive material, the cathode active material being a different material from both the first conductive material and the second conductive material,
the first conductive material has an average diameter (D50) of 0.01 to 0.5 μm, the second conductive material has an average diameter (D50) of 0.5 to 5 μm, wherein an average particle diameter of the second conductive material is greater than an average particle diameter of the first conductive material, and a porosity of the second conductive material is greater than a porosity of the first conductive material, and
a total conductive material content of the first cathode mixture layer and a total conductive material content of the second cathode mixture layer are 0.5 to 5% by weight based on a total weight of the cathode active material of the first and second cathode mixture layers.