公开(公告)号：US20230352749A1

公开(公告)日：2023-11-02

申请号：US18003688

申请日：2022-05-04

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Duckjae YOU ,  San MOON ,  Jihyun JANG ,  Seongho JEON

IPC: H01M10/42 ,  H01M4/131 ,  H01M4/525

CPC classification number: H01M10/4235 ,  H01M4/131 ,  H01M4/525 ,  H01M2004/028

Abstract: Provided are a positive electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same, the positive electrode including a current collector and a positive electrode active material layer on the current collector, wherein the positive electrode active material layer includes a positive electrode active material and an aromatic monovalent carboxylic acid.

公开(公告)号：US20250055143A1

公开(公告)日：2025-02-13

申请号：US18638438

申请日：2024-04-17

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Duckjae YOU ,  Hosung YANG ,  Changwon PARK ,  Jiye WOO ,  Seongho JEON

IPC: H01M50/494 ,  H01M10/052 ,  H01M50/42 ,  H01M50/426 ,  H01M50/431 ,  H01M50/443

Abstract: An electrode assembly and a rechargeable lithium battery including the same are provided. The electrode assembly includes a current collector; an electrode active material layer on the current collector; and a coating layer combined with the electrode active material layer. The coating layer includes polymer nanofibers each including a structural unit derived from a fluorine-based polymer and a structural unit derived from a nitrile-based polymer; and inorganic particles. The coating layer has a puncture strength of about 15 to about 100 gram force (gf) and a tensile strength of about 120 to about 1,000 kilogram force per square centimeter (kgf/cm2).

公开(公告)号：US20190067699A1

公开(公告)日：2019-02-28

申请号：US16105045

申请日：2018-08-20

Applicant: Samsung Electronics Co., Ltd. ,  Samsung SDI Co., Ltd.

Inventor： Woojin BAE ,  Kanghee LEE ,  Heechul JUNG ,  Seongho JEON ,  Sungsoo HAN

IPC: H01M4/62 ,  H01M4/133 ,  H01M4/134 ,  H01M4/36 ,  H01M4/38 ,  H01M4/587 ,  H01M10/0525 ,  C08J3/24

Abstract: A binder includes a cross-linked product of at least a first polymer, a second polymer, and a third polymer, wherein the cross-linked product is cross-linked by at least two ester bonds; the first polymer includes polyimide, polyamic acid, a copolymer thereof, or a combination thereof, wherein the first polymer includes a structural unit including an alkali metal and a structural unit including at least one hydroxyl functional group; the second polymer includes poly(acrylic acid), poly(methacrylic acid), a copolymer thereof, or a combination thereof; and the third polymer includes polyvinyl alcohol, polyacrylamide, polymethacrylamide, a copolymer thereof, or a combination thereof.

公开(公告)号：US20250006894A1

公开(公告)日：2025-01-02

申请号：US18677645

申请日：2024-05-29

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Injoe JUNG ,  Fumiko KIMURA ,  Yeongap KIM ,  Seongho JEON

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/38 ,  H01M4/583

Abstract: An electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same are provided. The electrode includes an active material layer including an active material and having a first hole and a second hole, the second hole having a depth greater than a depth of the first hole, wherein a ratio of the depth of the first hole to (:) the depth of the second hole is about 1:2 to about 1:5.

公开(公告)号：US20250140785A1

公开(公告)日：2025-05-01

申请号：US18670509

申请日：2024-05-21

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Hyejin KWON ,  Donghyun SHIN ,  Jaehong KIM ,  Jungwook CHA ,  Youngyeol CHO ,  Seongho JEON

IPC: H01M4/133 ,  H01M4/02 ,  H01M4/134 ,  H01M4/36 ,  H01M4/38 ,  H01M4/587 ,  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 current collector, a first negative active material layer on a first side of the current collector; and a second negative active material layer on a second side of the current collector, wherein a loading level (A) of the first negative active material layer is larger than a loading level (B) of the second negative active material layer, the first negative active material layer includes a 1a layer contacting the current collector and a 1b layer on one side of the 1a layer, the 1a layer includes a 1a negative active material, the 1b layer includes a 1b negative active material, the 1a negative active material includes natural graphite, or a mixture of natural graphite and artificial graphite, the 1b negative active material includes artificial graphite, and the second negative active material layer is a single layer.

公开(公告)号：US20230268512A1

公开(公告)日：2023-08-24

申请号：US18003952

申请日：2021-10-12

Applicant: Samsung SDI Co., Ltd.

Inventor： Jin-Su HA ,  Sungjin AHN ,  San MOON ,  Seongho JEON ,  Minho CHO

IPC: H01M4/62 ,  H01M4/485 ,  H01M10/052 ,  H01M4/525 ,  H01M4/38 ,  H01M4/583

CPC classification number: H01M4/622 ,  H01M4/485 ,  H01M10/052 ,  H01M4/525 ,  H01M4/382 ,  H01M4/583 ,  H01M4/386 ,  H01M2004/028

Abstract: Provided are a positive electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same, the positive electrode including a positive electrode active material, a conductive material, and a binder, wherein the positive electrode includes a polyimide-based polymer having a carboxyl group. The positive electrode has excellent lithium ion conductivity as well as prevents a side reaction of a positive electrode active material with an electrolyte by including a polyimide-based polymer having a carboxyl group in a positive electrode, wherein the polyimide-based polymer having high heat resistance and high stability is not phase-decomposed in the positive electrode to form a complex compound but protects the surface of the positive electrode active material.

公开(公告)号：US20220352502A1

公开(公告)日：2022-11-03

申请号：US17692704

申请日：2022-03-11

Applicant: Samsung SDI Co., Ltd.

Inventor： San MOON ,  Duckjae YOU ,  Jihyun JANG ,  Seongho JEON

IPC: H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/485 ,  H01M4/58 ,  H01M10/0525

Abstract: Provided are a positive electrode for a rechargeable lithium battery and a rechargeable lithium battery including the same. The positive electrode for a rechargeable lithium battery includes a current collector, a first positive electrode active material layer on the current collector and including a first positive electrode active material, and a second positive electrode active material layer on the first positive electrode active material layer and including a second positive electrode active material, wherein the first positive electrode active material layer includes ceramic particles, a particle diameter of each of the ceramic particles is in a range from about 10 nm to about 500 nm, and the ceramic particles are included only in the first positive electrode active material layer.

公开(公告)号：US20190097220A1

公开(公告)日：2019-03-28

申请号：US16137863

申请日：2018-09-21

Applicant: Samsung Electronics Co., Ltd. ,  Samsung SDI Co., Ltd.

Inventor： Heechul JUNG ,  Woojin BAE ,  Guesung KIM ,  Koichi TAKEI ,  Seongho JEON ,  Sungsoo HAN

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/137 ,  H01M4/583 ,  H01M4/38 ,  H01M4/04

Abstract: A negative active material including an active material core; and a polymer layer disposed on a surface of the active material core, wherein the polymer layer includes a third polymer including a cross-linked product of a first polymer and a second polymer, wherein the first polymer is at least one of polyamic acid, polyimide, or a combination thereof, and includes a first functional group; and the second polymer is water-soluble and includes a second functional group, and wherein the first polymer and the second polymer are cross-linked by an ester bond that is formed through at least one reaction starting from the first functional group and the second functional group, and at least one of the first polymer and the second polymer further includes a halogen group.