公开(公告)号：EP4195316A1

公开(公告)日：2023-06-14

申请号：EP22211546.1

申请日：2022-12-06

申请人： Samsung SDI Co., Ltd.

发明人： CHO, Yunshik ,  OH, Seunghyun ,  CHO, Minho ,  LEE, Kukjoo ,  JUNG, Kyunghwa ,  LEE, Jungmin

IPC分类号： H01M4/133 ,  H01M4/1393 ,  H01M4/62 ,  H01M10/0525

摘要： Disclosed is that a binder for a negative electrode of a rechargeable lithium battery, a negative electrode for a rechargeable lithium battery, and a rechargeable lithium battery including the same, and the binder including a copolymer of a styrene-based monomer and an acrylate-based monomer, wherein a mole ratio of the styrene-based monomer and the acrylate-based monomer is about 1:1 to about 1:3.

公开(公告)号：EP4439734A1

公开(公告)日：2024-10-02

申请号：EP24164000.2

申请日：2024-03-15

申请人： Samsung SDI Co., Ltd.

发明人： LEE, Kukjoo ,  CHO, Yunshik ,  OH, Seunghyun ,  CHO, Minho ,  JUNG, Kyunghwa ,  LEE, Jungmin

IPC分类号： H01M4/62 ,  H01M4/134 ,  H01M4/38 ,  H01M10/0525 ,  H01M4/133 ,  H01M4/36 ,  H01M4/66 ,  H01M4/02

CPC分类号： H01M2004/02620130101 ,  H01M4/134 ,  H01M4/38 ,  H01M4/386 ,  H01M2004/02120130101 ,  H01M4/622 ,  H01M4/625 ,  H01M10/0525 ,  H01M4/133 ,  H01M4/364 ,  H01M4/661 ,  H01M4/667

摘要： A negative electrode and a lithium battery including the same are provided. The negative electrode includes a negative electrode current collector, and a negative electrode active material layer provided on the negative electrode current collector. The negative electrode active material layer includes a negative electrode active material, a binder, and a carbon-based conductive material. The negative electrode active material includes a metal-based negative electrode active material, the binder includes an acrylic-based binder, and the carbon-based conductive material includes a fibrous carbon-based conductive material. The acrylic-based binder includes monomers having carboxyl, cyano, alkylene oxide, and/or sulfonic acid functionalities and at least a portion of the carboxyl groups are metal (e.g., lithium) carboxylate salts. Volume changes of the negative electrode material during charging/discharging may be suppressed or reduced and the capacity and lifespan characteristics of the lithium battery may be improved.

公开(公告)号：EP4456173A1

公开(公告)日：2024-10-30

申请号：EP24162505.2

申请日：2024-03-08

申请人： Samsung SDI Co., Ltd.

发明人： JUNG, Kyunghwa ,  LEE, Kukjoo ,  LEE, Jungmin ,  CHO, Yunshik ,  CHO, Minho ,  KIM, Hana

IPC分类号： H01M4/133 ,  C08F220/06 ,  C08F220/46 ,  H01M4/134 ,  H01M4/36 ,  H01M4/38 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/02

摘要： A negative electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same are provided. The negative electrode includes a SiC composite negative electrode active material and a binder, wherein the binder includes a first binder that is an acrylic copolymer. The acrylic copolymer includes a first acrylic acid monomer, a second acrylonitrile monomer, and a third (meth)acrylate monomer, the first acrylic acid monomer includes acrylic acid substituted with a lithium ion, and the third (meth)acrylate monomer is a (meth)acrylate monomer including an ethylene glycol group and has a weight average molecular weight (Mw) of less than about 900 g/mol.

公开(公告)号：EP4258381A1

公开(公告)日：2023-10-11

申请号：EP22878929.3

申请日：2022-10-06

申请人： Samsung SDI Co., Ltd.

发明人： LEE, Jungmin ,  KIM, Minjae ,  AHN, Won-Gi ,  LEE, Kukjoo

IPC分类号： H01M4/134 ,  H01M4/133 ,  H01M4/62 ,  H01M4/38 ,  H01M4/587 ,  H01M4/36 ,  H01M10/052 ,  H01M4/02

摘要： In an embodiment, disclosed are a negative electrode for a rechargeable lithium battery includes a current collector, a first active material layer on the current collector, and a second active material layer on the first active material layer, wherein at least one of the first active material layer and the second active material layer includes a silicon-based active material and a binder, the binder includes a copolymer (A) and a copolymer (B), the copolymer (A) includes a unit (a-1) derived from a (meth)acrylic acid-based monomer and a unit (a-2) derived from a (meth)acrylonitrile monomer, and the copolymer (B) includes a unit (b-1) derived from an aromatic vinyl-based monomer and a unit (b-2) derived from an ethylenically unsaturated monomer that is at least one of an unsaturated carboxylic acid alkyl ester monomer, a (meth)acrylic acid-based monomer, an unsaturated carboxylic acid amide monomer, and a conjugated diene monomer, and a rechargeable lithium battery including the same.