公开(公告)号：US11888151B2

公开(公告)日：2024-01-30

申请号：US16980037

申请日：2019-03-14

Applicant: LG Chem, Ltd.

Inventor： Chang Wan Koo ,  Ki Tae Kim ,  Sang Hoon Choy

IPC: H01M4/04 ,  H01M4/139 ,  H01M4/36 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/056 ,  H01M4/02

CPC classification number: H01M4/139 ,  H01M4/043 ,  H01M4/0404 ,  H01M4/362 ,  H01M4/62 ,  H01M10/056 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2004/028 ,  H01M2300/0082 ,  H01M2300/0091

Abstract: 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.

公开(公告)号：US20230123951A1

公开(公告)日：2023-04-20

申请号：US18085025

申请日：2022-12-20

Applicant: LG Chem, Ltd.

Inventor： Ki Tae Kim ,  Chang Wan Koo ,  Sang Hoon Choy

IPC: H01M4/36 ,  H01M4/04 ,  H01M4/139 ,  H01M4/62 ,  H01M10/052

Abstract: 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.

公开(公告)号：US11121361B2

公开(公告)日：2021-09-14

申请号：US16339598

申请日：2018-03-21

Applicant: LG Chem, Ltd.

Inventor： Byoung Hoon Ahn ,  Sang Hoon Choy ,  Chang Wan Koo ,  Hyun Chul Ha

IPC: H01M4/1397 ,  H01M4/36 ,  H01M10/0525 ,  H01M4/62

Abstract: 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.

公开(公告)号：US10910639B2

公开(公告)日：2021-02-02

申请号：US16069730

申请日：2017-09-27

Applicant: LG CHEM, LTD.

Inventor： Taek Soo Lee ,  Chang Wan Koo ,  Sang Hoon Choi ,  Jung Min Yang ,  Il Jae Moon

IPC: H01M4/36 ,  H01M4/04 ,  H01M4/13 ,  H01M4/62 ,  H01M4/139 ,  H01M10/0525 ,  H01M4/02

Abstract: A multi-layer negative electrode according to an embodiment of the present disclosure includes: a current collector configured to transmit electrons between an outer lead and a negative electrode active material; a first negative electrode mixture layer formed on one surface or both surfaces of the current collector and including a first negative electrode active material and a first binder; and a second negative electrode mixture layer formed on the first negative electrode mixture layer and including a second negative electrode active material, wherein the first negative electrode mixture layer has an electrode density of about 0.9 to 2.0 g/cc and the second negative electrode mixture layer has an electrode density of about 0.2 to 1.7 g/cc, which is a range lower than that of the electrode density of the first negative electrode mixture layer. The multi-layer negative electrode can be included in a lithium secondary battery.

公开(公告)号：US20200321599A1

公开(公告)日：2020-10-08

申请号：US16605415

申请日：2018-09-21

Applicant: LG Chem, Ltd.

Inventor： Ki Tae Kim ,  Chang Wan Koo ,  Sang Hoon Choy

IPC: H01M4/04 ,  H01M4/62

Abstract: The present invention provides a method for manufacturing an electrode, the method comprising the steps of: preparing a lump of mixture bulk; milling the mixture bulk to prepare granular powder having an average particle diameter of 30 micrometers to 180 micrometers; sprinkling the granular powder on the surface of a metal current collector; and rolling the granular powder on the metal current collector to laminate the granular powder on the metal current collector.

公开(公告)号：US11575121B2

公开(公告)日：2023-02-07

申请号：US16604801

申请日：2018-09-27

Applicant: LG Chem, Ltd.

Inventor： Ki Tae Kim ,  Chang Wan Koo ,  Sang Hoon Choy

IPC: H01M4/36 ,  H01M4/04 ,  H01M4/139 ,  H01M4/62 ,  H01M10/052

Abstract: 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.

公开(公告)号：US20210013487A1

公开(公告)日：2021-01-14

申请号：US16980037

申请日：2019-03-14

Applicant: LG Chem, Ltd.

Inventor： Chang Wan Koo ,  Ki Tae Kim ,  Sang Hoon Choy

IPC: H01M4/139 ,  H01M4/04 ,  H01M4/62 ,  H01M10/056 ,  H01M10/0525 ,  H01M4/36

Abstract: 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.

公开(公告)号：US20200168895A1

公开(公告)日：2020-05-28

申请号：US16604801

申请日：2018-09-27

Applicant: LG Chem, Ltd.

Inventor： Ki Tae Kim ,  Chang Wan Koo ,  Sang Hoon Choy

IPC: H01M4/36 ,  H01M4/62 ,  H01M4/04 ,  H01M10/052 ,  H01M4/139

Abstract: 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.

公开(公告)号：US10263242B2

公开(公告)日：2019-04-16

申请号：US15403678

申请日：2017-01-11

Applicant: LG Chem, Ltd.

Inventor： Byoung Hoon Ahn ,  Joon Sung Bae ,  Chang Wan Koo

IPC: H01M10/02 ,  H01M4/04 ,  H01M4/1393 ,  H01M4/36 ,  H01M4/587 ,  H01M4/62 ,  H01M4/583 ,  H01M4/133 ,  H01M10/0525 ,  H01M10/052 ,  H01M4/02

Abstract: 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.

公开(公告)号：US11876214B2

公开(公告)日：2024-01-16

申请号：US18085025

申请日：2022-12-20

Applicant: LG Chem, Ltd.

Inventor： Ki Tae Kim ,  Chang Wan Koo ,  Sang Hoon Choy

IPC: H01M4/36 ,  H01M4/04 ,  H01M4/139 ,  H01M4/62 ,  H01M10/052

CPC classification number: H01M4/362 ,  H01M4/0435 ,  H01M4/0471 ,  H01M4/139 ,  H01M4/623 ,  H01M10/052

Abstract: 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.