Cathode active material for lithium secondary battery, and lithium secondary battery including same
AssigneeThe Industry & Academic Cooperation in Chungnam National University (IAC)
InventorsChun Joong KIM, Hyung Kwon JEON
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Abstract
Proposed are a lithium secondary battery cathode active material doped with B and Sn and a lithium secondary battery including the cathode active material. The B and Sn doping enables a cathode capable of solving problems occurring in a high-nickel cathode, such as (1) an electrolyte side reaction on the surface, 2) a crystal structure collapse, 3) oxygen release, 4) inert Ni4+ generation; 5) cation mixing, and 6) transition metal elution. This improves the life span of a lithium secondary battery.
Claims5
A method of preparing a rhombohedral structured cathode active material for a lithium secondary battery, the cathode active material comprising nickel, cobalt, and manganese, having a nickel content of 10% to 24% by mole, and being doped with a heteroatom, the method comprising:
- synthesizing a metal oxide precursor;
- preparing a mixture of the precursor, dopant, and lithium hydroxide;
- and
- heat-treating the mixture and then grinding the mixture uniformly.
Dependencies are inferred from the claim text.