Lg Chem, Ltd

Chang-Wan Koo

Joon Sung Bae

Jae-Hyun Lee

Cha-Hun Ku

Duk-Hyun Ryu

Byoung Hoon Ahn

Han-Ho Lee

Min-Chul Jang

Jae Bin Chung

Moon Kyu Cho

Eun-Young Goh

Sun-Sik Shin

Jun-Yong Jeong

Jin-Hee Yeon

Jae-Hyun 109-1805 Cheonggu Narae Apartment Lee

Jun-Yong 107-408 Hanbat Garden Apartment Jeong

Cha-Hun 110-406 Samsung Hanwool Apartment Ku

Min-Chul 305-1503 Songgang Green Apartment Jang

Jin-Hee 7-107 Lg Chemical Apartment Yeon

Sun-Sik 128-1101 Hanbit Apartment Shin

Han-Ho 103-204 Hyundai Apartment Lee

Disclosed is an anode active material for lithium secondary batteries that includes natural graphite particles consisting of spherical particles of agglomerated graphite sheets, outer surfaces of which are not coated with a carbon-based material, wherein the surfaces of the particles have a degree of amorphization of at least 0.3 within a range within which an R value [R=I/I] (Iis the intensity of Raman around 1350 cmand Iis the intensity of Raman around 1580 cm) of a Raman spectrum is in the range of 0.30 to 1.0.

Lithium secondary battery comprising spherical graphite as anode active material

Disclosed is a cathode active material for secondary batteries in which a carboxymethyl cellulose derivative is coated on surfaces of particles of a lithium transition metal oxide having the formula LiMOwhere M: NiMnCowherein 0&#x2266;a&#x2266;0.9, 0&#x2266;b&#x2266;0.9, 0&#x2266;c&#x2266;0.5, and 0.85&#x2266;a+b+c&#x2266;1.05 and x+y=2, wherein 0.95&#x2266;x&#x2266;1.15.

Cathode active material and lithium secondary battery comprising same

Disclosed is a lithium secondary battery that includes an anode coated with an anode mixture including an anode active material, a cathode coated with a cathode mixture including a cathode active material, and a non-aqueous electrolyte, wherein the anode mixture includes, as aqueous binders, carboxymethyl cellulose (CMC) having a degree of substitution of a hydroxyl group (&#x2014;OH) with a carboxymethyl group (&#x2014;CHCOH) of 0.7 to 1.2, a molecular weight (Mn) of 500,000 to 900,000, and a pH of 6.5 to 8.0 and styrene-butadiene rubber (SBR) having a particle diameter of 90 nm to 150 nm and a tensile strength of 90 kgf to 160 kgf, and the anode has an electrode coating amount of 10 to 20 mg/cmand that enhances electrode processability and reduces a swelling phenomenon.

Lithium secondary battery having anode containing aqueous binder

Disclosed herein is a cathode active material including a lithium transition metal oxide based on at least one transition metal selected from a group consisting of Ni, Mn and Co. The lithium transition metal oxide contains fluorine, and most of the fluorine is present on a surface of the lithium transition metal oxide, and at least one metal selected from a group consisting of Mg, Ti, Zr, Al and Fe as well as sulfur (S) are further contained in the lithium transition metal oxide.

Cathode active material exhibiting improved property in high voltage

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Daejeon, South Korea

Chang-Wan Koo