Lg Chem, Ltd

Lg Energy Solution, Ltd.

Sang Hoon Choy

Taek Soo Lee

Ki Tae Kim

Byoung Hoon Ahn

Dong Hyun Kim

Hyeon Sik Choi

Cheol Woo Kim

Chang Wan Koo

Houng Sik Yoo

Dong Hyun Cho

Sung Kyun Chang

Ye Lin Kim

Joo Yul Baek

Hyung Suk Cho

Jong Won Lee

Je Young Kim

Jeong Ju Cho

Kyung Yeon Kang

Jihee Woo

Do Hwa Jung

Hong Kyu Park

Jae Hyun Lee

Yong Tae Lee

Ki Young Lee

Min Chul Jang

Sun Kyu Kim

Hyeong Jin Kim

KyungYeon Kang

Woo Ha Kim

Soo Hyun Ha

Shin Wook Jeon

Chang Hun Lee

Joon Hwan Lee

Chul Haeng Lee

Young Min Lim

Min Hee Lee

Sung-Kyun Chang

Ji Yeon Kim

Jae Woong Kim

Jun Soo Park

Dong Kyu Kim

Sung Pil Yoon

Il Geun Oh

Seungyong Lee

Ki Won Sung

Young Kuk Ko

Hyun Sik Chae

Jong Heon Seol

Jun Muk Lim

Gye Min Kwon

Jin Young Son

Houngsik Yoo

Yelin Kim

Cheolwoo Kim

Young Joon Jo

Gyemin Kwon

Ki Yeon Jo

Do Hyun Lee

Jung Keun Yoo

Ji Hee Yoon

Dong Hun Song

Hyun Chul Ha

Eui Yong Bang

In Seong Kim

Jin Myung Cha

Jongheon Seol

Jungkeun Yoo

Ji Hee Woo

Seong Wook Hong

Chang Ju Lee

Hyungsik Jang

Chae Gyu Lee

Hyun Won Lee

Il Jae Moon

Jung Min Yang

Hye Lim Shim

Cheol-Woo Kim

Wooha Kim

Jihee Yoon

Hyunwoo Choi

Shanghao Piao

Chan Soo Jun

Seong Keun Jang

Moo Yong Shin

Hye Lim Sim

Ga Hyun Lim

Hwi Soo Yang

Eun Hoe Jeong

Paul Choi

Dongwook Shin

Jung Sik Choi

Hyun Woo Choi

A positive electrode includes a current collector and a positive electrode active material layer disposed on the current collector, wherein the positive electrode active material layer includes a positive electrode active material, carbon nanotube, and a binder, the binder includes polyvinylidene fluoride which has a weight average molecular weight of 720,000 g/mol to 980,000 g/mol, a BET specific surface area of the carbon nanotube is 140 m/g to 195 m/g, and the positive electrode satisfies the following Formula 1:1.3≤≤3.4  [Formula 1]

Positive electrode and secondary battery including the positive electrode

A pressing jig of a battery cell including a pressing pad, in which the modulus of the central region is different from the modulus of the peripheral region, and a method of degassing a battery cell using the same are provided. The pressing pad can easily discharge gas in the battery cell during the formation process of a battery cell by allowing higher pressure to be applied to the central region than the peripheral region.

Pressing jig with a gradient hardness pressing pad for a battery cell and a degassing method of battery cell using the same

An insulation-coating overlay control system, an electrode plate for a secondary battery, and an insulation-coating overlay control method are provided. The system includes an insulation coater configured to coat an insulating material to allow the insulating material to cover a partial region of a coated part and a non-coated part in an electrode plate along a boundary part. The coated part has an electrode slurry coated thereon and the non-coated part does not have the electrode slurry coated thereon. An insulation-coating width measuring means is configured to measure an overlay width. An insulation coater moving means is configured to move the insulation coater and a controller is configured to control the insulation coater moving means to adjust the overlay width by comparing the measured overlay width with a predetermined overlay width setting range or an overlay width reference value.

Insulating coating overlay control system and insulating coating overlay control method

Provided is a positive electrode slurry for preparing a positive electrode for a lithium secondary battery,

Positive electrode slurry including oxalic acid, preparation method thereof, positive electrode for secondary battery, and secondary battery

The present invention relates to electrode slurry coating apparatus and method, the present invention ultimately allowing the process efficiency to be increased and rate of errors to be reduced when double-layer structured active material layers are formed by temporally adjusting the height of first and second discharge outlets through which active material is discharged.

Electrode slurry coating apparatus and method for forming double active material layers

The present technology relates to a manufacturing method for an electrode binder, comprising a step of dissolving pelletized polyvinylidene fluoride (PVDF) in a solvent; and an electrode assembly comprising the electrode binder. The present invention may provide an electrode assembly which has a low content of impurities in a binder solution, is capable of increasing dispersibility of an electrode active material, and exhibits excellent binding force.

Manufacturing method for electrode binder and electrode assembly comprising same electrode binder

The present invention relates to a method of preparing a positive electrode which includes forming a solid electrolyte by mixing a lithium salt and a polymer for a solid electrolyte in a dry atmosphere, forming a dry mixture by stirring after adding a conductive agent and a positive electrode active material to the solid electrolyte in a dry atmosphere, and pressing after coating a current collector with the dry mixture.

Method of preparing positive electrode

The present disclosure relates to a slot die coating apparatus for coating an electrode active material slurry onto an electrode collector, the slot die coating apparatus including: a coating roller; at least two or more dies; a discharge opening through which the electrode active material slurry is discharged in an opposite direction on which gravity acts; and an air vent installed in the die.

Slot die coating device having air vent

Provided is an electrode for a lithium secondary battery having excellent resistance and output characteristics while achieving high capacity characteristics due to a high active material content.

Electrode for lithium secondary battery

The present invention relates to an electrode slurry coating device and method, wherein the heights of first and second slot die heads for discharging active material can be controlled according to time to improve process efficiency and reduce defect rates when forming an active material layer having a double layer structure.

Secondary battery electrode plate including electrode mixture regions having different binder content, and method for manufacturing secondary battery electrode using same

The present invention relates to a method of reusing a positive electrode material, and more particularly, the method includes: inputting a positive electrode for a lithium secondary battery comprising a current collector, and a positive electrode active material layer formed on the current collector and including a first positive electrode active material, a first binder and a first conducting agent, into a solvent; separating at least a portion of the positive electrode active material layer from the current collector; adding second binder powder to the solvent and performing primary mixing a resulting mixture; and preparing a positive electrode material slurry by adding a second positive electrode active material and a second conducting agent to the solvent and performing secondary mixing a resulting mixture.

Method of reusing positive electrode material

A conductive material dispersion liquid, and an electrode and a lithium secondary battery manufactured using the same. The conductive material dispersion liquid includes a carbon-based conductive material, a dispersant, and a dispersion medium. The dispersant is a copolymer including a first repeating unit represented by Chemical Formula 1, a second repeating unit represented by Chemical Formula 2, and a third repeating unit represented by Chemical Formula 3, and the dispersion medium is a non-aqueous solvent.

Conductive material dispersion liquid, electrode and lithium secondary battery prepared by using the same

The present invention provides: an electrode mixture manufacturing method comprising the processes of introducing a first binder, an electrode active material, and a conductive material into an extruder, performing a first mixing of the first binder, the electrode active material, and the conductive material in the extruder, additionally introducing a second binder into the extruder and performing a second mixing, and yielding an electrode mixture resulting from the first mixing and the second mixing; an electrode mixture manufactured thereby; and an electrode manufacturing method using the electrode mixture.

Electrode mixture manufacturing method and electrode mixture

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Daejeon, South Korea

Sang Hoon Choy