Patent ID: 11909040
Assignee: LG ENERGY SOLUTION, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. An electrode assembly, comprising:
a negative electrode;
a separator; and
at least two or more positive electrodes which are stacked in the electrode assembly with the negative electrode and the separator, each of the positive electrodes including a positive electrode active material applied to a surface of a positive electrode collector,
wherein the positive electrode active material contains nickel, cobalt, and manganese, and a first composition ratio of nickel, cobalt, and manganese in the positive electrode active material applied to a first one of the positive electrodes is different from a second composition ratio of nickel, cobalt, and manganese in the positive electrode active material applied to a second one of the positive electrodes,
wherein the first positive electrode is disposed at an outside of the electrode assembly in a stacking direction and is coated with the positive electrode active material having the first composition ratio and containing a first amount of manganese and a first amount of nickel, the first amount of nickel being greater than the first amount of manganese,
the second positive electrode is disposed at an inside of the electrode assembly in the stacking direction and is coated with the positive electrode active material having the second composition ratio and containing a second amount of manganese and a second amount of nickel, the first amount of nickel being greater than the second amount of nickel, and
wherein the second composition ratio of nickel, cobalt, and manganese is within a ratio of 1:1:1 and 6:2:2.