Korea Electronics Technology Institute

Jae-Hun Kim

Jun Ho Song

Young Jun Kim

Kyoung Joon Lee

Jun Sung Lee

Woo Suk Cho

Jeom-Soo Kim

Min-Woo Lee

Jin Hwa Kim

A method of preparing a positive active material for a lithium secondary battery represented by the following Chemical Formula 1 (LiNiCoMnMO) includes: (a) preparing a metal salt aqueous solution including a lithium raw material, a manganese raw material, a nickel raw material, and a cobalt raw material; (b) wet-pulverizing the metal salt aqueous solution using beads having a particle diameter of 0.05 to 0.30 mm at 2000 to 6000 rpm for 2 to 12 hours to prepare a slurry; (c) adding a carbon source to the slurry; (d) spray-drying the slurry of the step (c) to prepare a mixed powder; and (e) heat-treating the mixed powder.

Positive active material for lithium secondary battery and method of preparing same

Disclosed are a precursor of a positive active material for a rechargeable lithium battery and a preparation method thereof, and a positive active material and a rechargeable lithium battery including the same, and specifically a precursor for a rechargeable lithium battery is represented by the following Chemical Formula 1, wherein a manganese ion concentration deviation in the precursor is within 3 wt %.NiCoMnMz(OH)&#x2003;&#x2003;[Chemical Formula 1](0&#x3c;x&#x3c;1, 0&#x2266;y&#x3c;1, 0.5&#x2266;1&#x2212;x&#x2212;y&#x2212;z, 0&#x2266;z&#x3c;1, and M is at least one kind of metal selected from the group consisting of Al, Mg, Fe, Cu, Zn, Cr, Ag, Ca, Na, K, In, Ga, Ge, V, Mo, Nb, Si, Ti, and Zr.)

Precursor of cathode active material for a lithium secondary battery, method for manufacturing the precursor, cathode active material, and lithium secondary battery including the cathode active material

Disclosed are a precursor for a rechargeable lithium battery, a positive active material including the same, a preparation method thereof, and a rechargeable lithium battery including the positive active material. More particularly, the present invention relates to a precursor including a sheet-shaped plate having a thickness of about 1 nm to about 30 nm and that is represented by the following Chemical Formula 1.NiCoMnM(OH)&#x2003;&#x2003;[Chemical Formula 1] In the above Chemical Formula 1,

Precursor of a cathode active material for a lithium secondary battery, cathode active material, method for manufacturing the cathode active material, and lithium secondary battery including the cathode active material

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Yongin-si, South Korea

Jae-Hun Kim