公开(公告)号：US20200044238A1

公开(公告)日：2020-02-06

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 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/36

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：US20200028174A1

公开(公告)日：2020-01-23

申请号：US16338154

申请日：2018-03-22

Applicant: LG Chem, Ltd.

Inventor： Byoung Hoon Ahn ,  Houng Sik Yoo ,  Chang Wan Koo ,  Hyun Chul Ha ,  Sang Hoon Choy ,  Jong Won Lee ,  Dong Hyun Kim ,  Gye Min Kwon

IPC: H01M4/62 ,  H01M4/136 ,  H01M4/58 ,  H01M10/0525

Abstract: The present invention relates to a positive electrode active material pre-dispersion composition which includes a lithium iron phosphate-based positive electrode active material, a dispersant, and a solvent, wherein the dispersant includes a hydrogenated nitrile butadiene rubber (HNBR), a slurry composition for a secondary battery positive electrode which is prepared by using the positive electrode active material pre-dispersion composition, a positive electrode for a secondary battery, and a lithium secondary battery including the positive electrode.

公开(公告)号：US11380899B2

公开(公告)日：2022-07-05

申请号：US16347677

申请日：2018-04-27

Applicant: LG CHEM, LTD.

Inventor： Chang Wan Koo ,  Sang Hoon Choy

IPC: H01M4/66 ,  H01M4/04 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/02

Abstract: The present invention relates to a method for preparing a positive electrode, comprising preparing a mixture by dry mixing a positive electrode active material, a dry conductive material, and a dry binder, applying high shear force to the mixture, disposing the mixture on a current collector, and rolling the current collector on which the mixture is disposed, wherein the dry conductive material is at least any one of a carbon nanotube and a carbon fiber, and the high 10 shear force is 100 N to 500 N.

公开(公告)号：US11276846B2

公开(公告)日：2022-03-15

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 ,  H01M4/02 ,  H01M4/58 ,  H01M4/139 ,  H01M4/66 ,  H01M4/70 ,  H01M4/52 ,  H01M10/052 ,  H01M4/133

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：US11038175B2

公开(公告)日：2021-06-15

申请号：US16338154

申请日：2018-03-22

Applicant: LG Chem, Ltd.

Inventor： Byoung Hoon Ahn ,  Houng Sik Yoo ,  Chang Wan Koo ,  Hyun Chul Ha ,  Sang Hoon Choy ,  Jong Won Lee ,  Dong Hyun Kim ,  Gye Min Kwon

IPC: H01M4/62 ,  H01M4/136 ,  H01M4/58 ,  H01M10/0525 ,  H01M4/02

Abstract: The present invention relates to a positive electrode active material pre-dispersion composition which includes a lithium iron phosphate-based positive electrode active material, a dispersant, and a solvent, wherein the dispersant includes a hydrogenated nitrile butadiene rubber (HNBR), a slurry composition for a secondary battery positive electrode which is prepared by using the positive electrode active material pre-dispersion composition, a positive electrode for a secondary battery, and a lithium secondary battery including the positive electrode.

公开(公告)号：US20170125788A1

公开(公告)日：2017-05-04

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: H01M4/04 ,  H01M4/62 ,  H01M4/587 ,  H01M10/0525 ,  H01M4/36

CPC classification number: H01M4/0404 ,  H01M4/0435 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/366 ,  H01M4/583 ,  H01M4/587 ,  H01M4/622 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2220/20 ,  Y02E60/122 ,  Y02P70/54 ,  Y02T10/7011 ,  Y10T29/49117

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：US09583756B2

公开(公告)日：2017-02-28

申请号：US14297756

申请日：2014-06-06

Applicant: LG Chem, Ltd.

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

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

CPC classification number: H01M4/0404 ,  H01M4/0435 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/366 ,  H01M4/583 ,  H01M4/587 ,  H01M4/622 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2220/20 ,  Y02E60/122 ,  Y02P70/54 ,  Y02T10/7011 ,  Y10T29/49117

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.

Abstract translation: 本发明提供一种锂二次电池用阳极，其由包括电极集电体的多层结构，包含形成在电极集电体上的第一负极活性物质的第一负极活性物质层和第二负极活性物质层构成， 第二负极活性材料具有比第一阳极活性材料相对较低的压力密度和相对较大的平均粒径。 由于根据本发明的实施方案的阳极可以包括多层活性材料层，其包括在电极集电器上具有不同压力密度和平均粒径的两种负极活性材料，电极表面的孔隙率可以是 即使在压制过程之后也改善离子迁移率进入电极。 因此，可以提高锂二次电池的充电特性和循环寿命。

公开(公告)号：US20140287316A1

公开(公告)日：2014-09-25

申请号：US14297756

申请日：2014-06-06

Applicant: LG Chem, Ltd.

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

IPC: H01M4/36 ,  H01M4/04 ,  H01M4/583

CPC classification number: H01M4/0404 ,  H01M4/0435 ,  H01M4/133 ,  H01M4/1393 ,  H01M4/366 ,  H01M4/583 ,  H01M4/587 ,  H01M4/622 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/021 ,  H01M2220/20 ,  Y02E60/122 ,  Y02P70/54 ,  Y02T10/7011 ,  Y10T29/49117

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.

Abstract translation: 本发明提供一种锂二次电池用阳极，其由包括电极集电体的多层结构，包含形成在电极集电体上的第一负极活性物质的第一负极活性物质层和第二负极活性物质层构成， 第二负极活性材料具有比第一阳极活性材料相对较低的压力密度和相对较大的平均粒径。 由于根据本发明的实施方案的阳极可以包括多层活性材料层，其包括在电极集电器上具有不同压力密度和平均粒径的两种负极活性材料，电极表面的孔隙率可以是 即使在压制过程之后也改善离子迁移率进入电极。 因此，可以提高锂二次电池的充电特性和循环寿命。