Lg Chem, Ltd

Sang Uck Lee

Song Taek Oh

Geun Chang Chung

Cheol-Hee Park

Hong Kyu Park

Sung-Kyun Chang

Song-Taek Oh

Il Hong Kim

Su Rim Lee

Hyelim Jeon

Sin Kyu Kim

Jae Kook Kim

Sinkyu Kim

Se Hui Sohn

Jin Sub Lim

GeunChang Chung

Provided are a mixed cathode active material having improved power characteristics and safety, and a lithium secondary battery including the same. More particularly, the present invention relates to a mixed cathode active material which may assist power in a low SOC range to widen an available state of charge (SOC) range and may simultaneously provide improved safety by blending substituted LFP, in which operating voltage is adjusted by substituting a portion of iron (Fe) with other elements such as titanium (Ti), in order to prevent a rapid increase in resistance of manganese (Mn)-rich having high capacity but low operating voltage in a low SOC range (e.g., a SOC range of 10% to 40%), and a lithium secondary battery including the mixed cathode active material.

Mixed cathode active material having improved power characteristics and safety, and lithium secondary battery including the same

Disclosed is a cathode active material including a lithium manganese-based oxide. The lithium manganese-based oxide has a spinel structure represented by Formula 1 below and high lithium ion diffusivity since (440) planes are predominantly formed in a crystal structure thereof.LiMMnOQ&#x2003;&#x2003;(1) In Formula 1, 0&#x2266;x&#x2266;0.3, 0&#x2266;y&#x2266;1, and 0&#x2266;z&#x2266;1, M includes at least one element selected from the group consisting of Al, Mg, Ni, Co, Fe, Cr, V, Ti, Cu, B, Ca, Zn, Zr, Nb, Mo, Sr, Sb, W, Ti, and Bi, and Q includes at least one element selected from the group consisting of N, F, S, and Cl.

Cathode active material comprising lithium manganese-based oxide and non-aqueous electrolyte secondary battery based upon the same

An object of the present invention is a cathode active material including a lithium manganese-based oxide. The lithium manganese-based oxide has a spinel structure, exhibits core-shell phase transition by which phase transition of a crystal structure occurs from a cubic structure to a tetragonal structure in a direction from the surface of particles to the center of the particles during discharging to the 3V region, and includes a conductive material at the shell to improve electrical conductivity of the tetragonal structure.

Cathode active material with high capacity and improved conductivity and non-aqueous electrolyte secondary battery comprising the same

Disclosed is a cathode active material for secondary batteries, comprising at least one compound selected from the following Formula 1: xLiMO*yLiM'O*zLiPO(1) wherein M is at least one element selected from 1 period or 2 period metals having an oxidation number of +4; M&#x2032; is at least one element selected from 1 period or 2 period metals having a mean oxidation number of +3; and 0.1&#x2266;x&#x2266;0.9, 0.1&#x2266;y&#x2266;0.9, 0&#x3c;z&#x2266;0.2 and x+y+z=1.

Cathode active material for lithium secondary battery

Growing community of inventors

Daejeon, South Korea

Sang Uck Lee