Lg Chem, Ltd

Lg Energy Solution, Ltd.

Sin Young Park

Ho Suk Shin

Jens M Paulsen

Sun Sik Shin

Wang Mo Jung

Hong Kyu Park

Dong Hyeuk Park

Hong-Kyu Park

Tae Won Kang

Sang Jin Woo

Sung-Kyun Chang

Tae Gu Yoo

Bo Ram Lee

Tae Gon Kim

Min Kwak

Yoon Bong Wi

Hyang Mok Lee

Sang Bong Nam

Ji Soo Park

Jeoung Soo Kim

Taegon Kim

Boram Lee

Hang Seob Yoon

Byung Chun Park

Chi Ho Jo

So Ra Baek

Jin-Hyung Lim

Donghun Lee

Dae Jin Lee

Dong Sub Lee

Jinhyung Lim

Jae Hong Kim

Sang Min Park

Minchul Jang

Sung Kyun Chang

Dong Hun Lee

Song Taek Oh

Byoungkuk Son

Chang Bum Ahn

Hyun Suk Kim

Eung Jin Jang

Seong Hoon Kang

Geun Chang Chung

Seul Ki Kim

In Sung Uhm

Eunkyung Park

Jung Min Han

Jung Seok Choi

Hyung Man Cho

Sung Chul Park

InSung Uhm

Ki Won Sung

Hwa Seok Chae

Won Seok Chang

Sin Kyu Kim

Hak Yoon Kim

Jin Hyung Lim

Kwang Woo Yoon

Hyun Jin Oh

Sun Jung Hwang

Se Hui Sohn

Sang Wook Kim

Jun Ho Moon

In Tae Chun

Keun Wan An

Byung Joon Chae

Seung Yong Son

Daejin Lee

Seongmin Ha

Young Ho Jeon

Tae Hwan Chung

Dong Hee Seo

Hyeon Jin Lee

Hakyoon Kim

Gi Yang

Ju Hyung Kim

KeunWan An

Hyun Kyung Ko

Jin Young Hwang

A sealing apparatus for a secondary battery is disclosed, the sealing apparatus configured to seal a battery case of the secondary battery with an electrode assembly therein. The sealing apparatus comprises: a pair of sealing blocks which press the outer circumferential surface of the battery case; and a heating unit which is provided in the pair of sealing blocks and heat the pair of sealing blocks. The pair of sealing blocks comprise: lead sealing regions configured to press the lead sealing portion of the battery case; and case sealing regions configured to press the case sealing portion of the battery case. The heating unit heats the lead sealing regions and the case sealing regions of the pair of sealing blocks at different temperatures.

Sealing apparatus for secondary battery

A method for producing a positive electrode active material includes preparing a lithium transition metal oxide in the form of a secondary particle in which primary particles are aggregated, mixing the lithium transition metal oxide and a carbon-based material of a hollow structure having a plurality of pores to form a mixture, and surface treating the mixture in a mechanical manner to form a carbon coating layer on the surface of the lithium transition metal oxide, wherein the carbon-based material of a hollow structure having a plurality of pores has a specific surface area of 200 m2/g or greater and a graphitization degree(ID/IG) of 0.5 or greater.

Method for producing positive electrode active material for lithium secondary battery and positive electrode active material for lithium secondary battery produced thereby

A notching mold for molding a non-coated portion of an electrode base material, wherein the non-coated portion, is formed on each of two ends of a coated portion, includes: a main mold having an upper mold and a lower mold, parallel to each other, and are slidable close to or away from each other. A first auxiliary mold having auxiliary upper and lower molds coupled to the upper and lower molds, respectively, is configured so that the non-coated portion on one end of the electrode base material is disposed at a processible position. A second auxiliary mold having auxiliary upper and lower molds coupled to the upper and lower molds, respectively, is configured so that, when the electrode base material is input into the main mold, the non-coated portion on the other end of the electrode base material is disposed at a processible position.

Notching mold

The present disclosure relates to a method for preparing a positive electrode additive for a lithium secondary battery having a high irreversible capacity and being capable of preventing gelation and reducing gas generation, and a positive electrode additive prepared thereby. The method for preparing the positive electrode additive includes the steps of: mixing a lithium raw material, a nickel raw material and, optionally, a raw material containing an element M, and then heat-treating the mixture, thereby preparing a predetermined lithium nickel oxide, wherein the lithium raw material includes LiO and LiOH, and the LiOH is used in an amount of 5 to 10% by weight with respect to the total weight of the lithium raw material.

Method for preparing positive electrode additive for lithium secondary battery, and positive electrode additive for lithium secondary battery prepared thereby

A conductive agent includes a first particle and a second particle, wherein the first particle includes a secondary particle structure in which graphene sheets are connected to each other, the first particle includes a plurality of graphene sheets arranged in different directions, and the second particle is a carbon nanotube. An electrode including the conductive agent, and a secondary battery including the electrode are also provided.

Conductive agent, electrode including the conductive agent, and secondary battery including the electrode

An electrode includes an electrode active material layer, wherein the electrode active material layer includes an electrode active material and a conductive agent, wherein the conductive agent includes a first conductive agent and a second conductive agent, wherein the first conductive agent includes a secondary particle in which a plurality of graphene sheets are arranged in different directions and a portion of one graphene sheet is connected to a portion of adjacent another graphene sheet, the second conductive agent includes a carbon nanotube structure in which 2 to 5,000 single-walled carbon nanotube units are bonded to each other, and the carbon nanotube structure is included in an amount of 0.01 wt % to 0.5 wt % in the electrode active material layer. A secondary battery including the electrode is also provided.

Electrode and secondary battery including the same

A negative electrode includes a negative electrode active material layer, wherein the negative electrode active material layer includes a negative electrode active material and a conductive material. The negative electrode active material includes SiO(0≤x<2) particles and the conductive material includes secondary particles in which a portion of one graphene sheet is connected to a portion of an adjacent graphene sheet and a carbon nanotube structure in which 2 to 5,000 single-walled carbon nanotube units are coupled to each other, wherein the oxygen content of the secondary particles is 1 wt % to 10 wt % based on the total weight of the secondary particles, the specific surface area of the secondary particles measured by a nitrogen adsorption BET method is 500 m/g to 1100 m/g, and the carbon nanotube structure is included in the negative electrode active material layer in an amount of an 0.01 wt % to 1.0 wt %.

Negative electrode and secondary battery including negative electrode

The present disclosure relates to a positive electrode additive, a manufacturing method thereof, and a positive electrode and a lithium rechargeable battery including the same. Specifically, one embodiment of the present disclosure provides a positive electrode additive for a lithium rechargeable battery comprising: a compound represented by the following Chemical Formula 1; a compound represented by the following Chemical Formula 2; and lithium phosphate (LiPO):LiNiMO  [Chemical Formula 1]

Positive electrode additive, manufacturing method thereof, and positive electrode and lithium rechargeable battery including the same

The present invention relates to a lithium secondary battery manufactured by forming a negative electrode free battery and then forming a lithium metal on the negative electrode current collector by charging. In the lithium secondary battery, since lithium metal is formed on the negative electrode current collector in the state of being blocked with the atmosphere, the generation of the conventional surface oxide layer (native layer) formed on the negative electrode does not occur inherently, thereby preventing the reduction of the efficiency and lifetime characteristics of the battery.

Lithium secondary battery

A method of preparing a positive electrode active material for a lithium secondary battery includes mixing a transition metal hydroxide containing transition metals including nickel (Ni), cobalt (Co) and manganese (Mn), a lithium-containing raw material and a doping raw material including at least one doping element selected from the group consisting of Al, Mg, Co, V, Ti, Zr and W and performing a first calcination treatment thereon to prepare a lithium composite transition metal oxide doped with the doping element; and mixing the lithium composite transition metal oxide and a coating raw material including at least one coating element selected from the group consisting of Al, Mg, Co, Ti, Zr and B and performing a second calcination treatment thereon to prepare a positive electrode active material in which a coating layer containing the coating element is formed on the lithium composite transition metal oxide.

Method of preparing positive electrode active material for lithium secondary battery, positive electrode active material for lithium secondary battery, and positive electrode for lithium secondary battery and lithium secondary battery including the same

Discussed is an including a transfer unit transferring an electrode sheet having a plurality of notching grooves formed in a side surface thereof to a cutting point via a measuring point, wherein, when a front notching groove which is disposed at a front end in the electrode sheet is passing through the cutting point, a notching groove disposed in a rear end of the front notching groove is configured to pass through the measuring point; a detection unit at the measuring point to detect the notching groove passing through the measuring point and generating a notching groove detection signal; and a cutting unit at the cutting point to cut the electrode sheet according to the notching groove detection signal generated by the detection unit.

Apparatus and method for cutting electrode sheet

Discussed is a notching apparatus and method for a secondary battery. The notching apparatus includes: a notching unit notching a portion of an electrode that is continuously supplied; a drying unit drying the electrode while the electrode discharged from the notching unit passes therethrough; and a collecting unit collecting the electrode discharged from the drying unit, wherein the drying unit includes a heating body provided with a drying space that is a passage through which the electrode passes therein, and lamp parts mounted on the heating body to irradiate infrared rays onto a surface of the electrode while the electrode moves through the drying space.

Notching apparatus and method for secondary battery

The present invention relates an electrode notching apparatus. The electrode notching apparatus comprises: a notching unit shaping an electrode into a predetermined pattern; a heating unit drying the electrode processed by the notching unit; and a collecting unit collecting the electrode dried by the heating unit, wherein the heating unit comprises: a heating body having a drying space through which the electrode supplied by the notching unit passes; and heating members directly heating a surface of the electrode passing through the drying space to dry moisture remaining on the electrode.

Disclosed are a transition metal precursor for preparation of a lithium transition metal oxide, in which a ratio of tap density of the precursor to average particle diameter D50 of the precursor satisfies the condition represented by Equation 1 below, and a lithium transition metal oxide prepared using the same. 

Transition metal precursor having low tap density and lithium transition metal oxide having high particle strength

The present invention relates to an electrode heating device that dries an electrode. The electrode heating device comprises a heating body having a drying space through which the electrode passes, and a heating member that directly heats and dries a surface of the electrode that passes through the drying space to remove moisture from the electrode.

Electrode heating device and manufacturing system for secondary battery, which comprises the same

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Daejeon, South Korea

Sin Young Park