Lg Chem, Ltd

Lg Energy Solution, Ltd.

Byoung Hoon Ahn

Sang Hoon Choy

Dong Hyun Kim

Joon Sung Bae

Houng Sik Yoo

Chang Wan Koo

Hyeon Sik Choi

Jong Won Lee

Hyun Sik Chae

Jin Young Son

Gye Min Kwon

Jae Bin Chung

Houngsik Yoo

Gyemin Kwon

Chang-Wan Koo

Hyun Chul Ha

Cheol Woo Kim

Ki Won Sung

Shin Wook Jeon

Chang Hun Lee

Hyung Suk Cho

Dong Hun Song

Yelin Kim

Chae Gyu Lee

Ki Yeon Jo

Jungkeun Yoo

Seong Wook Hong

Hyeong Geun Chae

Hye Lim Sim

Hyunwoo Choi

Yoonju Han

A die for coating an insulating liquid may include a die body configured to be positioned on a current collector with a certain space and discharge an insulating liquid; and a discharge portion configured to be formed on one surface where the insulating liquid of the die body is discharged, and form a discharge path and a discharge port where the insulating liquid is discharged, wherein the discharge portion includes a first discharge portion positioned at a front region side of a coating direction of the insulating liquid, and a second discharge portion positioned at a rear region side of the coating direction of the insulating liquid, an insulating liquid discharge path is formed between the first discharge portion and the second discharge portion, and an insulating liquid discharge port is formed between an end of the first discharge portion and an end of the second discharge portion.

Die for coating insulating liquid and method for coating insulating liquid

A negative electrode slurry including a lithium titanium oxide, a dispersant including a polar OH group and a non-polar alkyl group, a binder, and a solvent, and a method of preparing the same.

Negative electrode slurry for lithium secondary battery and method of preparing the same

A method of preparing a slurry composition for a secondary battery positive electrode includes preparing a positive electrode active material pre-dispersion by mixing a lithium iron phosphate-based positive electrode active material, a dispersant, and a solvent, and preparing a slurry for a positive electrode by further mixing a conductive agent, a binder, and an additional solvent with the positive electrode active material pre-dispersion is provided. A positive electrode for a secondary battery which is prepared by using the same method, and a lithium secondary battery including the positive electrode are also provided.

Method of preparing slurry composition for secondary battery positive electrode, positive electrode for secondary battery prepared by using the same, and lithium secondary battery including the positive electrode

A method of preparing graphene, including preparing graphite; and putting the graphite in the inside of a vessel and applying vibration at a frequency of 55 Hz to 65 Hz to the vessel.

Method of preparing graphene

The present invention provides a method of preparing a slurry for a secondary battery positive electrode which includes forming a first mixture in a paste state by adding a lithium iron phosphate-based positive electrode active material, a conductive agent, a binder, and a solvent, and preparing a slurry for a positive electrode by mixing while further adding a solvent to the first mixture in the paste state.

Method of preparing slurry for secondary battery positive electrode

The present invention relates to a positive electrode active material pre-dispersion composition which includes a lithium iron phosphate-based positive electrode active material, a dispersant, and a solvent, wherein the dispersant includes a hydrogenated nitrile butadiene rubber (HNBR), a slurry composition for a secondary battery positive electrode which is prepared by using the positive electrode active material pre-dispersion composition, a positive electrode for a secondary battery, and a lithium secondary battery including the positive electrode.

Positive electrode active material pre-dispersion composition including hydrogenated nitrile butadiene rubber as dispersant, positive electrode for secondary battery, and lithium secondary battery including the positive electrode

The present invention relates to a grinder using induced electric fields. The grinder comprises: a grinding unit on which a plurality of protrusions for cutting are disposed on an outer circumferential surface thereof; a power unit disposed in the grinding unit to generate electric fields and attach the conductive materials to the grinding unit; and a chamber disposed outside the grinding unit and comprising beads that disperse and grind the conductive materials attached to the grinding unit, wherein the conductive materials have directionality by the electric fields of the power unit.

Grinder using induced electric field

The present disclosure relates to a carbon black dispersion solution comprising carbon black, a dispersion medium, and partially hydrogenated nitrile rubber having a residual double bond (RDB) value of 0.5% by weight to 40% by weight calculated according to the following Mathematical Formula 1, wherein dispersed particle diameters of the carbon black have particle size distribution Dof 0.1 &#x3bc;m to 2 &#x3bc;m, a method for preparing the same, and methods for preparing electrode slurry and an electrode using the same.

Carbon black dispersion solution and manufacturing method therefor

The present invention provides a composition for forming a positive electrode of a secondary battery which includes a positive electrode active material, a conductive material, and a dispersing agent, in which the conductive material includes a carbon-based material having a specific surface area of 130 m/g or more and an oil absorption number of 220 ml/100 g or more at 0.1 wt % to 2 wt % with respect to the total weight of the composition for forming a positive electrode, and the dispersing agent is introduced into the conductive material to form a conductive material-dispersing agent composite, and the conductive material-dispersing agent composite has a particle size distribution Dof 0.8 &#x3bc;m to 1.2 &#x3bc;m, a positive electrode for a secondary battery and a secondary battery, which are manufactured using the same.

Composition for forming positive electrode of secondary battery, positive electrode for secondary battery and secondary battery manufactured using the same

The present disclosure relates to a carbon nanotube dispersion including entangled-type carbon nanotubes, a dispersion medium, and partially hydrogenated nitrile rubber having a residual double bond (RDB) value of 0.5% by weight to 40% by weight calculated according to the following Mathematical Formula 1, wherein dispersed particle diameters of the carbon nanotubes have particle size distribution Dof 2 &#x3bc;m to 5 &#x3bc;m, a method for preparing the same, and methods for preparing electrode slurry and an electrode using the same.

Carbon nanotube dispersion liquid and manufacturing method thereof

The present invention provides a method of preparing an electrode slurry for lithium secondary batteries in which the physical properties of the electrode slurry are improved to minimize a drag line by performing the primary mixing process at high viscosity, a method of manufacturing an electrode of which a defect rate of the electrode is reduced and with which battery stability is improved by using the method of preparing an electrode slurry for secondary batteries, an electrode manufactured using the method, and a secondary battery including the electrode.

Method of preparing electrode slurry for lithium secondary batteries

Provided is an anode for a lithium secondary battery composed of a multi-layered structure including an electrode current collector, a first anode active material layer including a first anode active material formed on the electrode current collector, and a second anode active material layer including a second anode active material having relatively lower press density and relatively larger average particle diameter than the first anode active material. Since an anode according to an embodiment of the present invention may include a multi-layered active material layer including two kinds of anode active materials having different press densities and average particle diameters on an electrode current collector, porosity of the surface of the electrode may be improved even after a press process to improve ion mobility into the electrode. Thus, charge characteristics and cycle life of a lithium secondary battery may be improved.

Anode for lithium secondary battery and lithium secondary battery including the same

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 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.

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Daejeon, South Korea

Byoung Hoon Ahn