公开(公告)号：US20230178742A1

公开(公告)日：2023-06-08

申请号：US18061916

申请日：2022-12-05

Applicant: SAMSUNG SDI CO., LTD.

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

IPC: H01M4/62 ,  H01M4/133 ,  C08F212/08 ,  C08F220/18

CPC classification number: H01M4/622 ,  C08F212/08 ,  C08F220/1808 ,  H01M4/133 ,  H01M2004/027

Abstract: A binder for a negative electrode of a rechargeable lithium battery includes a copolymer of a styrene-based monomer and an acrylate-based monomer, wherein a mole ratio of the styrene-based monomer to the acrylate-based monomer is about 1:1 to about 1:3, and the binder has a swelling degree to an electrolyte of about 50 wt% or more to about 70 wt% or less.

公开(公告)号：US20230051902A1

公开(公告)日：2023-02-16

申请号：US17790949

申请日：2021-01-07

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Jungmin LEE ,  Minjae KIM ,  Seunghyun OH ,  Heeeun YOO ,  Kukjoo LEE

IPC: H01M4/525 ,  H01M10/0525 ,  H01M4/36 ,  H01M4/505 ,  H01M50/417 ,  H01M10/42 ,  H01M4/58

Abstract: Provided is a lithium secondary battery comprising: a positive electrode including a positive electrode active material; a negative electrode including a negative electrode active material; and a first functional layer between the positive electrode and the negative electrode, wherein the first functional layer includes plate-like polyolefin particles having an average diameter of 1 μm to 8 μm, and the positive electrode includes a positive electrode active material layer including a positive electrode active material and a flame retardant, or has a stacked structure including a positive electrode active material layer and a second functional layer including a flame retardant.

公开(公告)号：US20250118747A1

公开(公告)日：2025-04-10

申请号：US18676348

申请日：2024-05-28

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Jungmin LEE ,  Minho CHO ,  Yunshik CHO ,  Kyunghwa JUNG ,  Hana KIM ,  Kukjoo LEE ,  Ho KIM

IPC: H01M4/583 ,  H01M4/02 ,  H01M4/133 ,  H01M4/134 ,  H01M4/38 ,  H01M4/62 ,  H01M10/0525

Abstract: Disclosed are a negative electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same. The negative electrode includes a negative electrode active material, a cellulose-based compound, and a binder, and an amount of Na in the negative electrode is about 200 ppm to about 600 ppm.

公开(公告)号：US20240209120A1

公开(公告)日：2024-06-27

申请号：US18481918

申请日：2023-10-05

Applicant: SAMSUNG SDI CO., LTD.

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

IPC: C08B11/145 ,  H01M4/13 ,  H01M4/62 ,  H01M10/052

CPC classification number: C08B11/145 ,  H01M4/13 ,  H01M4/622 ,  H01M10/052

Abstract: A method of preparing a lithium salt of carboxymethyl cellulose is provided. The method includes carrying out alkalization of cellulose in the presence of lithium hydroxide to generate an alkali product; and mixing the resulting product with a halogenated (e.g., halogen-including) acetic acid or a salt thereof to carry out etherification. An amine derivative is added to at least one of the alkalization or etherification.

公开(公告)号：US20240363835A1

公开(公告)日：2024-10-31

申请号：US18504987

申请日：2023-11-08

Applicant: SAMSUNG SDI CO., LTD.

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

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

CPC classification number: H01M4/364 ,  H01M4/133 ,  H01M4/134 ,  H01M4/386 ,  H01M4/587 ,  H01M4/622 ,  H01M10/052 ,  H01M2004/027

Abstract: A negative electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same are provided. The negative electrode includes a Si—C 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：US20230116454A1

公开(公告)日：2023-04-13

申请号：US17961475

申请日：2022-10-06

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Jungmin LEE ,  Minjae KIM ,  Won-Gi AHN ,  Kukjoo LEE

IPC: H01M4/38 ,  H01M10/0525 ,  H01M4/62 ,  H01M4/583

Abstract: Disclosed herein is a negative electrode including 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, and 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, or a conjugated diene monomer, and a rechargeable lithium battery including the same.

公开(公告)号：US20250149738A1

公开(公告)日：2025-05-08

申请号：US18823987

申请日：2024-09-04

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Jungmin LEE ,  Kyunghwa JUNG ,  Kukjoo LEE ,  Hyo-jung SONG ,  Minho CHO ,  Yunshik CHO ,  Hana KIM

IPC: H01M50/451 ,  H01M4/02 ,  H01M4/133 ,  H01M4/36 ,  H01M4/587 ,  H01M4/62 ,  H01M10/052 ,  H01M50/434 ,  H01M50/44

Abstract: A negative electrode for a rechargeable lithium battery includes a current collector, a negative electrode active material layer on the current collector, and an organic-inorganic composite layer on the negative electrode active material layer and integrated with the negative electrode active material layer. The negative electrode active material layer includes a negative electrode active material and a first binder, the organic-inorganic composite layer includes a second binder, and the first binder and the second binder include a copolymer including a structural unit derived from a (meth)acrylonitrile monomer.

公开(公告)号：US20250070147A1

公开(公告)日：2025-02-27

申请号：US18942087

申请日：2024-11-08

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Jungmin LEE ,  Minjae KIM ,  Won-Gi AHN ,  Kukjoo LEE

IPC: H01M4/38 ,  H01M4/02 ,  H01M4/04 ,  H01M4/583 ,  H01M4/62 ,  H01M10/0525

Abstract: Disclosed herein is a negative electrode including 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 the first active material layer and the second active material layer each independently includes a silicon-based active material and a binder, and 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, or a conjugated diene monomer, and a rechargeable lithium battery including the same.

公开(公告)号：US20230231109A1

公开(公告)日：2023-07-20

申请号：US18098626

申请日：2023-01-18

Applicant: SAMSUNG SDI CO., LTD.

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

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/62 ,  H01M10/052 ,  H01M4/587

CPC classification number: H01M4/364 ,  H01M4/386 ,  H01M4/622 ,  H01M10/052 ,  H01M4/587 ,  H01M2004/027

Abstract: A negative electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same are disclosed. The negative electrode may include a silicon-based negative active material and a binder, where the binder is an acryl-based copolymer, the acryl-based copolymer including an acrylic acid first monomer, an acrylonitrile second monomer, and a (meth)acrylate third monomer. The acrylic acid first monomer may include acrylic acid substituted with lithium ions. The (meth)acrylate third monomer may include an ethylene glycol group, and a weight-average molecular weight (Mw) of the (meth)acrylate third monomer is less than about 900 g/mol.