Cathode for lithium secondary battery and secondary battery comprising same
AssigneeSK On Co., Ltd.
InventorsYoung Uk PARK, Seung Hyun KIM, Yong Hyun CHO
Life of this patent
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Abstract
A cathode for a lithium secondary battery includes: a cathode current collector; and a cathode active material layer formed on the cathode current collector and including over-lithiated oxide particles containing nickel and manganese, wherein a molar ratio of lithium to total metal elements is greater than 1. A manganese content in a surface portion of the over-lithiated oxide particles is greater than a manganese content at a central portion thereof. A nickel content in the central portion of the over-lithiated oxide particles is greater than a nickel content in the surface portion thereof.
Claims15
A cathode for a lithium secondary battery comprising:
- a cathode current collector;
- and
- a cathode active material layer formed on the cathode current collector and comprising over-lithiated oxide particles containing nickel and manganese, wherein a molar ratio of lithium to total metal elements is greater than 1,
- wherein a manganese content in a surface portion of the over-lithiated oxide particles is greater than a manganese content at a central portion thereof, and
- a nickel content in the central portion of the over-lithiated oxide particles is greater than a nickel content in the surface portion thereof.
Dependencies are inferred from the claim text.