公开(公告)号：US20190305308A1

公开(公告)日：2019-10-03

申请号：US16063837

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: H01M4/587 ,  H01M4/133 ,  H01M10/0525 ,  H01M4/62

Abstract: The present disclosure relates to a multilayer negative electrode comprising a negative electrode current collector configured to transfer 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 containing natural graphite as a negative electrode active material and a second negative electrode mixture layer formed on the first negative electrode mixture layer and containing artificial graphite as a negative electrode active material, and a lithium secondary battery including the same.

公开(公告)号：US20190027740A1

公开(公告)日：2019-01-24

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 ,  H01M4/62

Abstract: Disclosed are a multi-layer negative electrode and a lithium secondary battery including the same. The multi-layer negative electrode 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.

公开(公告)号：US20200044257A1

公开(公告)日：2020-02-06

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 ,  H01M10/0525 ,  H01M4/62

Abstract: A positive electrode and a method for preparing a positive electrode, including 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 one of a carbon nanotube and a carbon fiber, and the high shear force is 50 N to 1000 N.