公开(公告)号：US20180151865A1

公开(公告)日：2018-05-31

申请号：US15824829

申请日：2017-11-28

Applicant: Samsung SDI Co., Ltd.

Inventor： Yumi SONG ,  Seonyoung KWON ,  Kihyun KIM ,  Soohyeon KIM ,  Jinhwa KIM ,  Joongho MOON ,  Jaeho LEE ,  Kwanghwan CHO ,  Soonbong CHOI ,  Mingzi HONG

IPC: H01M4/131 ,  H01M4/133 ,  H01M4/66 ,  H01M10/0525

CPC classification number: H01M4/131 ,  C01B32/22 ,  H01M4/133 ,  H01M4/366 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M4/665 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/028 ,  Y02T10/7011

Abstract: A composite cathode active material, a cathode including the composite cathode active material, and a lithium battery including the cathode are provided. The composite cathode active material includes a core including a lithium metal oxide and a coating layer on the core, wherein the lithium metal oxide includes two or more transition metals including nickel (Ni), an amount of Ni within one mole of the two or more transition metals included in the lithium metal oxide is about 0.65 mol or greater, the coating layer includes LiF, and a resistance of the composite cathode active material is lower than that of the core.

公开(公告)号：US20200058925A1

公开(公告)日：2020-02-20

申请号：US16663105

申请日：2019-10-24

Applicant: Samsung SDI Co., Ltd.

Inventor： Yumi SONG ,  Seonyoung KWON ,  Kihyun KIM ,  Soohyeon KIM ,  Jinhwa KIM ,  Joongho MOON ,  Jaeho LEE ,  Kwanghwan CHO ,  Soonbong CHOI ,  Mingzi HONG

IPC: H01M4/131 ,  H01M4/66 ,  H01M10/0525 ,  H01M4/133 ,  H01M4/485 ,  H01M4/505 ,  H01M4/36 ,  H01M10/052 ,  H01M4/525

Abstract: A composite cathode active material, a cathode including the composite cathode active material, and a lithium battery including the cathode are provided. The composite cathode active material includes a core including a lithium metal oxide and a coating layer on the core, wherein the lithium metal oxide includes two or more transition metals including nickel (Ni), an amount of Ni within one mole of the two or more transition metals included in the lithium metal oxide is about 0.65 mol or greater, the coating layer includes LiF, and a resistance of the composite cathode active material is lower than that of the core.

公开(公告)号：US20230178721A1

公开(公告)日：2023-06-08

申请号：US17997354

申请日：2021-04-27

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Hyeseung JUNG ,  Jaeho LEE ,  Soochan KIM ,  Chaewoong CHO

IPC: H01M4/485 ,  H01M4/583 ,  H01M4/38 ,  H01M10/0525 ,  H01M4/62

CPC classification number: H01M4/485 ,  H01M4/583 ,  H01M4/386 ,  H01M10/0525 ,  H01M4/625 ,  H01M2004/027

Abstract: The present invention relates to a negative electrode for a lithium secondary battery and a lithium secondary battery comprising same. The negative electrode for a lithium secondary battery comprise: a current collector; and a negative electrode active material layer formed on the current collector and comprising a, negative electrode active material, lithium titanium oxide, and a conductive material, wherein 2 wt % or less of lithium titanium oxide is contained relative to 100 wt % of the negative electrode active material layer.

公开(公告)号：US20210280862A1

公开(公告)日：2021-09-09

申请号：US16320057

申请日：2017-08-22

Applicant: Samsung SDI Co., Ltd.

Inventor： Jungmin HAN ,  Kihyun KIM ,  Jaeho LEE ,  Ming-Zi HONG

IPC: H01M4/505 ,  H01M10/0525 ,  H01M4/38 ,  H01M4/525

Abstract: Provided are a cathode active material for a lithium secondary battery, a method for preparing the same, and a lithium secondary battery comprising the same. The cathode active material for a lithium secondary battery comprises: a lithium metal compound; and a lithium compound disposed on the surface of the lithium metal compound, wherein the content of lithium contained in the lithium compound is 0.25 parts by weight or less with respect to 100 parts by weight of the lithium metal compound, wherein the specific surface area of the lithium compound is between 0.5 m2/g and 2.0 m2/g, and the pH of the lithium compound is between 11.5 and 12.3.

公开(公告)号：US20190190019A1

公开(公告)日：2019-06-20

申请号：US16326894

申请日：2017-08-22

Applicant: Samsung SDI Co., Ltd.

Inventor： Jaeho LEE ,  Seonyoung KWON ,  Kihyun KIM ,  Yumi SONG ,  Kwanghwan CHO

IPC: H01M4/36 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62

Abstract: Provided are a composite cathode active material for a lithium ion battery including a nickel-rich lithium nickel-based compound having a nickel content of 50 to 100 mol % based on a total content of transition metals; and a coating film including a rare earth metal hydroxide and disposed on the surface of the nickel-rich lithium nickel-based compound, a manufacturing method therefor, and a lithium ion battery including a cathode including the composite cathode active material.