公开(公告)号：US11545660B2

公开(公告)日：2023-01-03

申请号：US16851755

申请日：2020-04-17

Applicant: LG CHEM, LTD.

Inventor： Jun Hyuk Song ,  Eun Kyung Kim ,  Yong Ju Lee ,  Sang Wook Woo ,  Ju Ho Chung ,  Suk In Noh

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0525 ,  H01M4/02

Abstract: A lithium secondary battery, wherein there is a pre-lithiated negative electrode such that a total irreversible capacity of a positive electrode is greater than a total irreversible capacity of the negative electrode while satisfying 150

公开(公告)号：US11456446B2

公开(公告)日：2022-09-27

申请号：US17040405

申请日：2020-01-30

Applicant: LG CHEM, LTD.

Inventor： Ye Ri Kim ,  Sang Wook Woo ,  Oh Byong Chae

IPC: H01M4/04 ,  H01M4/36 ,  H01M10/0525 ,  H01M4/02

Abstract: A method for pre-lithiation of a negative electrode for a secondary battery, for reducing the time required for pre-lithiation and reducing changes in volume of the electrode. The method includes immersing a negative electrode for a secondary battery in the electrolyte to perform electrolyte impregnation, and pre-lithiating the negative electrode. Immersing the negative electrode for the secondary battery in an electrolyte includes introducing the prepared negative electrode into an electrolyte bath containing the electrolyte, and removing air bubbles and moisture in the negative electrode by applying a vacuum to the electrolyte bath in which the negative electrode is immersed.

公开(公告)号：US11329312B2

公开(公告)日：2022-05-10

申请号：US16500276

申请日：2017-12-29

Applicant: LG CHEM, LTD.

Inventor： Oh Byong Chae ,  Yoon Ah Kang ,  Jun Hyuk Song ,  Eun Kyung Kim ,  Sang Wook Woo

IPC: H01M10/0525 ,  H01M4/04 ,  H01M4/131 ,  H01M4/134 ,  H01M4/36 ,  H01M4/66 ,  H01M4/02

Abstract: A pre-lithiation apparatus that pre-lithiates a negative electrode structure having a first surface on which a negative electrode is disposed to produce a negative electrode unit of a battery, the apparatus includes a first roll rotatable to wind or unwind the negative electrode structure before the pre-lithiation is performed, a second roll installed to be spaced apart from the first roll and rotatable to wind and collect the negative electrode structure, on which the pre-lithiation is performed, and a lithium roll crossing a direction in which the negative electrode structure is transferred from the first roll to the second roll to come into contact with at least one of a first surface and a second surface of the negative electrode structure while being transferred from the first roll to the second roll. The lithium roll includes a lithium foil and an elastic member.

公开(公告)号：US10804539B2

公开(公告)日：2020-10-13

申请号：US16303039

申请日：2017-09-29

Applicant: LG CHEM, LTD.

Inventor： Hee Won Choi ,  Sang Wook Woo ,  Oh Byong Chae ,  Eun Kyung Kim

IPC: H01M4/62 ,  H01M4/04 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/36 ,  H01M4/38 ,  H01M10/052 ,  H01M10/42 ,  H01M4/1399 ,  H01M4/137 ,  H01M4/02 ,  H01M10/04

Abstract: A negative electrode for a lithium-metal secondary battery and a lithium-metal secondary battery including the same are provided which have an excellent life characteristic and have less irregular resin phases formed on the surface the negative electrode. The negative electrode includes a polymer layer arranged in a lattice structure having vacant spaces, so that the specific surface area of the negative electrode can be increased, a uniform current density distribution can thereby be achieved, the negative electrode has excellent life characteristics, and the formation of irregular resin phases can be suppressed.

公开(公告)号：US20200295358A1

公开(公告)日：2020-09-17

申请号：US16494458

申请日：2018-07-11

Applicant: LG Chem, Ltd.

Inventor： Oh Byong Chae ,  Sang Wook Woo ,  Eun Kyung Kim ,  Yoon Ah Kang ,  Jun Hyuk Song

IPC: H01M4/36 ,  H01M10/052 ,  H01M4/38 ,  H01M4/62 ,  H01M4/48

Abstract: The present invention relates to a negative electrode for a secondary battery which comprises a negative electrode collector, a negative electrode active material layer formed on the negative electrode collector, and a lithium metal layer, wherein an adhesive layer is disposed between the negative electrode active material layer and the lithium metal layer, and the lithium metal layer comprises lithium and metal oxide in a weight ratio of 50:50 to 99:1.

公开(公告)号：US09997773B2

公开(公告)日：2018-06-12

申请号：US14898977

申请日：2015-07-23

Applicant: LG Chem, Ltd.

Inventor： Ju Ho Chung ,  Eun Kyung Kim ,  Sang Wook Woo ,  Sung Bin Park ,  Ye Ri Kim ,  Jun Hyuk Song

IPC: H01M4/36 ,  H01M4/485 ,  H01M4/131 ,  H01M4/62 ,  H01M4/1391 ,  H01M10/0525 ,  H01M4/136 ,  H01M4/1397 ,  H01M4/58

CPC classification number: H01M4/366 ,  H01M4/131 ,  H01M4/136 ,  H01M4/1391 ,  H01M4/1397 ,  H01M4/485 ,  H01M4/582 ,  H01M4/623 ,  H01M10/0525 ,  Y02T10/7011

Abstract: Disclosed are a negative electrode active material for lithium secondary batteries, a method of preparing the same and a lithium secondary battery including the same. More particularly, the negative electrode active material includes a core that includes a lithium titanium oxide represented by Formula 1 below and a coating layer that is located in a surface of the core and includes fluorine, and thus, a moisture content in the active material is decreased and adsorption of outside moisture is inhibited, thereby removing concern for side reaction occurrence due to moisture. In addition, loss of an SEI layer may be prevented due to a stable fluorine-containing coating layer formed on a surface of the active material. As a result, battery performance may be enhanced and stable expression thereof is possible: LixTiyO4,  [Formula 1] wherein x and y are the same as defined in the present specification.

公开(公告)号：US20150072238A1

公开(公告)日：2015-03-12

申请号：US14540335

申请日：2014-11-13

Applicant: LG CHEM, LTD.

Inventor： Sang Wook Woo ,  Ji Heon Ryu ,  Eun Kyung Kim ,  Je Young Kim ,  Sang Jo An ,  Min Young Hong

IPC: H01M4/58 ,  H01M4/139 ,  H01M4/04 ,  C01B25/42 ,  H01M10/052

CPC classification number: H01M4/5825 ,  C01B25/42 ,  H01M4/366 ,  H01M4/625 ,  H01M10/0525 ,  Y02T10/7011

Abstract: Provided is an anode active material including a transition metal-pyrophosphate of Chemical Formula 1 below: M2P2O7   where M is any one selected from the group consisting of titanium (Ti), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), ruthenium (Ru), palladium (Pd), and silver (Ag), or two or more elements thereof.Since the anode active material of the present invention is stable and has excellent conversion reactivity while including only transition metal and phosphate without using lithium in which the price thereof is continuously increased, the anode active material of the present invention may improve capacity characteristics.

Abstract translation: 本发明提供一种负极活性物质，其包含下述化学式1的过渡金属焦磷酸盐：M 2 P 2 O 7化学式1其中M为选自钛（Ti），铬（Cr），锰（Mn）， 铁（Fe），钴（Co），镍（Ni），钌（Ru），钯（Pd）和银（Ag）或其两种以上元素。 由于本发明的负极活性物质是稳定的并且具有优异的转化反应性，而只使用过渡金属和磷酸盐，而不使用价格不断上涨的锂，本发明的负极活性材料可以提高容量特性。

公开(公告)号：US12107263B2

公开(公告)日：2024-10-01

申请号：US16982343

申请日：2019-03-18

Applicant: LG CHEM, LTD.

Inventor： Oh Byong Chae ,  Sang Wook Woo ,  Je Young Kim

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/04 ,  H01M4/38 ,  H01M4/587 ,  H01M10/0525

CPC classification number: H01M4/366 ,  H01M4/0402 ,  H01M4/364 ,  H01M4/386 ,  H01M4/587 ,  H01M10/0525 ,  H01M2004/027

Abstract: A negative electrode for a lithium secondary battery, a method of producing the negative electrode, a method of producing a pre-lithiated negative electrode by pre-lithiation of the negative electrode, and a lithium secondary battery including the negative electrode. The negative electrode can increase the capacity of a battery and improve the electrochemical performance by securing the initial reversibility of a negative electrode by pre-lithiation, and allow lithium ions to be diffused into a negative electrode active material layer during pre-lithiation without being lost.

公开(公告)号：US12027688B2

公开(公告)日：2024-07-02

申请号：US17252119

申请日：2019-10-10

Applicant: LG CHEM, LTD.

Inventor： Oh Byong Chae ,  Sang Wook Woo ,  Ye Ri Kim

IPC: H01M4/04 ,  H01M4/02 ,  H01M4/38 ,  H01M4/583

CPC classification number: H01M4/0404 ,  H01M4/382 ,  H01M4/386 ,  H01M4/583 ,  H01M2004/027

Abstract: A method of manufacturing a negative electrode for lithium secondary batteries. With the method, a negative electrode for lithium secondary batteries having excellent cycle performance may be manufactured by performing a process of compressing the negative electrode after pre-lithiation of the negative electrode so that the porosity of the negative electrode after the pre-lithiation is maintained within a certain range.

公开(公告)号：US11322736B2

公开(公告)日：2022-05-03

申请号：US16465995

申请日：2018-06-08

Applicant: LG CHEM, LTD.

Inventor： Jun Hyuk Song ,  Oh Byong Chae ,  Eun Kyung Kim ,  Sang Wook Woo

IPC: H01M4/134 ,  H01M4/1395 ,  H01M4/04 ,  H01M10/052 ,  H01M4/38 ,  H01M4/1393 ,  H01M4/1391 ,  H01M4/62 ,  H01M4/131 ,  H01M4/133 ,  H01M4/36 ,  H01M4/02 ,  H01M4/48 ,  H01M4/58 ,  H01M4/587 ,  H01M10/0525

Abstract: TA negative electrode, a secondary battery including the same, and a method of preparing the negative electrode are provided. The negative electrode, which includes a current collector; a negative electrode active material layer disposed on the current collector; a first layer disposed on the negative electrode active material layer and including Li; and a second layer disposed on the first layer and including an inorganic material is provided. A loading amount of the first layer may satisfy Equation 1: 0.65×(x1−y1)