Patent ID: 11955629
Assignee: LG CHEM, LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C  Y | IPC C  H

Claim 0:
1. A lithium secondary battery comprising a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and an electrolyte,
wherein the positive electrode active material for a lithium secondary battery, the positive electrode active material consists of a compound represented by Formula 1 below and allowing reversible intercalation/deintercalation of lithium,
wherein from a crystal structure analysis of the positive electrode active material by a Rietveld method in which space group R-3m is used in a crystal structure model on the basis of an Xray diffraction analysis, a thickness of an MO slab is 2.1262 Å to 1270 Å, a thickness of an inter slab is 6051 Å to 6054 Å, and a cation mixing ratio between Li and Ni is from 0.30% to 0.36%,
wherein the cation mixing of Li and Ni refers to an amount of Ni cations present in a lithium layer,

Lix[Nia1Cob1Mnc1]O2  [Formula 1]

in Formula 1 above, 1.0≤x≤1.04, a1=0.88, b1=0.08, c1=0.04, and a1+b1+c1=1,
wherein a charging capacity of the lithium secondary battery is from 237.0 mAh/g to 237.2 mAh/g.