Lg Chem, Ltd

Lg Energy Solution, Ltd.

Other

Myung Han Lee

Sung Hyun Park

Hyun Sup Lee

Ki Soo Lee

Dae Sik Hong

Yi Young Choi

Heon Yong Kwon

Soon Ho Sun

Kyoung Ho Kim

Bog Ki Hong

Se Woo Yang

Dong Hyun Kim

Ye Hoon Im

Kyun Il Rah

Ji Eun Kim

Eun Ji Shin

Chang Sun Han

Seul Ki Im

Hyunsup Lee

Hyun Jee Kwon

Hyeon Sik Choi

Chang Hun Han

Yoon Gyung Cho

Jin Young Park

Sang Min Park

Ji Won Park

Kwang Hyun Kim

Jin Young Lee

Seok Pil Sa

Sang Gi Lee

Gi Cheul Kim

Kyung Yul Bae

Sung Min Lee

Sung Soo Park

Hyo Sook Joo

Sang Hoon Lee

Sung Ho Park

Jae Hoon Choe

Jung Yong Lee

Sun Mi Kim

Hyemin Lee

Ju Eun Kim

Hye Mi Nam

Dae Woong Lee

Sang Jin Jeon

Ji Hyun Park

Seong Su Park

Hee Jung Choi

Byeong In Ahn

Seok Hwan Kim

Oh Joo Kwon

Hyun Jin Yang

Kyung Mee Lee

Sol Cho

Yeon Soo Kim

Young Suk You

Joong Soo Kim

Tae Bin Ahn

Chae Gyu Lee

Hye Jin Han

Won Seok Cho

Sang Eun Kim

Chang Kwon Chung

Dong Wook Lee

Ki Youl Yoon

Hee Kwang Park

Yu Taek Sung

Hyeon Hui Kim

Dong Hyun Woo

Hyun Mo Lee

Seung Mi Lee

Jin Sook Ryu

Jae Won Jeong

Dong H Lee

Won Chan Park

Dae Chul Kim

Dong Cheol Choe

Jong Young Choi

Sang Eun An

Hyun Ju Kim

Jong Sang Park

Duck Joong Yun

Yun Kon Kim

Jeongyong Lee

Do Hyun Lee

Eun Gu Han

Chan Joong Kim

Hea Soon Lee

Hyejin Han

Jeong Yong Lee

Daewoong Lee

Hyungmin Ahn

Seung Ha Kim

Woo Jin An

Yeon Hyuk Heo

Min Su Hwang

Kyung Hwan Yoon

Jeongnam Kim

Eui Seok Sa

Provided is a method of evaluating electrode quality capable of simply and quickly filtering out defective electrodes by measuring a color coordinate value of electrodes before roll-pressing, which specifically includes: providing an electrode which includes a current collector and an active material layer formed on the current collector and has not been roll-pressed; measuring a color coordinate value of the active material layer using an optical instrument; and evaluating the electrode as a good product when the measured color coordinate value satisfies a predetermined electrode quality evaluation criterion and as defective when the measured color coordinate value does not satisfy the predetermined electrode quality evaluation criterion.

Electrode quality evaluation method and electrode manufacturing method

The present invention relates to an apparatus for evaluating drying quality of an electrode, and the apparatus includes: an oven configured to provide a space in which an electrode is dried; a measuring unit configured to be positioned at an outlet of the oven and measure a color coordinate value of an electrode active material layer with respect to the dried electrode; and an determination unit configured to determine whether the electrode is dry from the color coordinate value, wherein the determination unit sets a reference value, and determines that a dry state of the electrode is defective if the measured color coordinate value is less than the reference value, and a difference between the measured color coordinate value and the reference value is more than a preset value.

Dry quality evaluation device for electrode and dry quality evaluation method for electrode

The present invention relates to an eddy current sensor for detecting a crack in a battery cell, and a system for detecting a crack of a battery cell including the eddy current sensor. According to the present invention, it is possible to easily detect a crack generated in an electrode, an electrode tab or a welded portion.

Eddy current sensor for detecting crack of battery cell and system for detecting crack of battery including the same

The present invention relates to an electrode drying apparatus and an electrode drying method, and the electrode drying apparatus includes: an oven configured to provide a space in which the electrode is dried and to include a hot air nozzle or an infrared heater; a color coordinate measuring unit configured to be positioned at an outlet of the oven and measure a color coordinate value of an electrode active material layer with respect to the dried electrode; and a controller configured to analyze a drying result of the electrode from the color coordinate value, determine whether the electrode is defective in drying, and control a drying condition of the electrode.

Electrode drying device and electrode drying method

A polyolefin-polystyrene multi-block copolymer and method of making the same is disclosed herein. In some embodiments, a polyolefin-polystyrene multi-block copolymer having a ratio of a loss modulus (E″) to a storage modulus (E') satisfying the following conditions (a) and (b) over a temperature range of −80° C. to 40° C., wherein the ratio is represented by a loss tangent (tan δ) value and is obtained by dynamic mechanical analysis (DMA), (a) a maximum of the tan δ value in a peak present in the temperature range is 0.20 to 0.35, and (b) a half-width of the peak ranges from 32.0° C. to 50.0° C. The polyolefin-polystyrene multi-block copolymer has a structure in which polystyrene chains are attached to both ends of a polyolefin chain.

Polyolefin-polystyrene multi-block copolymer and method for producing same

Provided is a method of evaluating electrode quality, which includes: providing a plurality of electrodes which include a current collector and an active material layer formed on the current collector and have not been roll-pressed; measuring a color coordinate value of the active material layer of each of the plurality of electrodes using an optical instrument and calculating an average value; and evaluating the electrodes as good products when a difference between the color coordinate value measured from the individual electrodes and the average value is no more than a predetermined value and as defective when the difference exceeds the predetermined value.

The present invention relates to a method for evaluating an injection physical property of a plastic resin, and a polyethylene resin suitable for an injection molding process and, more particularly, to a novel method for evaluating an injection physical property of a plastic resin, which, when a particular plastic resin is processed by an injection process, can accurately derive injection suitability of the plastic resin and injection pressure in the injection process through a physical property value measured by using a resin specimen, and a polyethylene resin suitable for injection molding.

Assessment method for injection molding property of plastic form

The present application provides a resin composition which effectively inhibits a photobleaching phenomenon as well as realizes excellent external blocking properties and optical properties through the secondary structure transition concentration and relaxation time of the resin composition, a reliability evaluation method thereof, and a color conversion film comprising the same.

Resin composition and reliability evaluation method thereof and color conversion film comprising the same

A method for evaluating long-term durability of a resin for piping is provided. Unlike the conventional FNCT evaluation method requiring a long period of time, the method disclosed herein is capable of predicting long-term durability of a resin for piping in a short time, by a simple calculation using a content of tie molecules, an entanglement molecular weight (M) and a content of ultrahigh molecular weight components. In addition, the olefinic polymer is configured to have a predetermined relationship in relation to the content of tie molecules, the entanglement molecular weight (M) and the content of ultrahigh molecular weight components, whereby the polymer of the present application can be used in the manufacture of a heating pipe requiring excellent long-term durability.

Method for predicting long-term durability of resin composition for piping and olefinic polymer used for resin for piping

A SAP evaluation apparatus includes: a main body installed with a lifting bar that is raised or lowered; a container portion installed under the lifting bar in the main body and having an internal containing space for containing an absorber; an operating portion connected to the lifting bar and having a lifting plate that is raised or lowered within the containing space and applies pressure to the absorber and an injection portion for injecting an ink in the direction of the absorber; a dispersion measurement portion for measuring the dispersion of the ink through the absorber; and a controller installed at the main body to measure absorption of the ink into the absorber and measure swelling capacity of the absorber while the ink is injected into the absorber.

SAP evaluation apparatus

The super absorbent polymer comprises: a base polymer powder including a first crosslinked polymer of a water-soluble ethylenically unsaturated monomer having at least partially neutralized acidic groups; and a surface crosslinked layer formed on the base polymer powder and including a second crosslinked polymer in which the first crosslinked polymer is further crosslinked via a surface crosslinking agent, wherein the super absorbent polymer has: a fixed height absorption (FHA) of 22.5 g/g to 29 g/g, a saline flow conductivity (SFC) of 35 (&#xb7;10cm&#xb7;s/g) or more, and T-20 of 180 seconds or less.

Super absorbent polymer and method for producing same

The present application relates to a method for selecting an injection-molded article and a method for manufacturing an injection-molded article. An injection-molded article having excellent crack stability can be produced using the material selected using the described selection method without having to manufacture test articles through injection molding.

Method for selecting material of injection-molded article and method for manufacturing injection-molded article

The present invention relates to an extrusion die and a method for extruding a sheet using the same, and according to one aspect of the present invention, there is provided an extrusion die comprising a storage part configured to hold a raw material, the storage part defining a first width, a pressure part configured to move the raw material through the storage part, a first die defining a second width less than the first width, such that a flow width of the raw material becomes narrower, a second die in fluid communication with the first die, the second die defining a width that increases from the second width to a third width, such that the flow width of the raw material passing through the first die becomes wider and a flow thickness becomes smaller, and a heating part configured to heat the raw material passing through the second die.

Extrusion die and extrusion method of sheet using the same

A method of preparing a poly(ether ester) copolymer is provided, and more particularly, a method of preparing a poly(ether ester) copolymer having a high content of a polyether and high viscosity by using a dicarboxylic acid as a starting material is provided. According to the present invention, a dicarboxylic acid of which production cost is low is used as a starting material to prepare a poly(ether ester) copolymer having a high content of polyether and having a high viscosity without solid-phase polymerization.

Method of preparing poly(ether ester) copolymer

A polymerization initiator composition includes isomers of the polymerization initiator, thereby preventing instability and inertness of the polymerization initiator and physical property degradation of the SSBR, minimizing by-products and unreacted materials, and remarkably improving a conversion ratio. In addition, when the polymerization initiator composition according to the present invention is used, there is no need to add a polar additive separately upon polymer polymerization, since the polar additive is already added at the time of preparing the polymerization initiator. Further, the polymer initiator composition has high polarity so that the hydrophobic SSBR and the hydrophilic silica can be effectively dispersed.

Polymerization initiator composition, preparation method therefor, and method for preparing polymer using same

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Daejeon, South Korea

Myung Han Lee