公开(公告)号：US20190036119A1

公开(公告)日：2019-01-31

申请号：US16069710

申请日：2017-07-04

Applicant: LG Chem, Ltd.

Inventor： Hyuck Lee ,  Seung Beom Cho ,  San Su Son ,  Jin Wook Ju ,  Sang Soon Choi ,  Jong Pil Kim

IPC: H01M4/525 ,  C01G53/00 ,  H01M4/505 ,  H01M10/0525

Abstract: Provided are a method of preparing a positive electrode active material for a secondary battery, in which the positive electrode active material is uniformly doped with various doping elements without worrying about surface damage of the active material and characteristics degradation by including mixing a metal precursor for a positive electrode active material and a raw material including a doping element, in which an average particle diameter ratio is in a range of 5:1 to 2,000:1, using acoustic resonance to prepare a precursor doped with the doping element, and mixing the doped precursor with a lithium raw material and performing a heat treatment, and a positive electrode active material which has improved structure stability by being prepared by the above method and may improve battery characteristics, for example, capacity reduction may be minimized and cycle characteristics may be improved when used in the battery.

公开(公告)号：US20230081939A1

公开(公告)日：2023-03-16

申请号：US17793490

申请日：2021-01-29

Applicant: LG Chem, Ltd.

Inventor： Jin Hoo Jeong ,  Myung Gi Jeong ,  Jin Wook Ju ,  Ji Hun Jung ,  Eung Ju Lee

IPC: C01G53/00 ,  H01M10/052

Abstract: A positive electrode active material precursor has a hydroxide represented by Formula 1, wherein the positive electrode active material precursor is a secondary particle, in which a plurality of primary particles are aggregated, and includes crystallines in which major axes of the primary particles are arranged in a direction from a center of the secondary particle toward a surface thereof and a (001) plane of the primary particle is arranged parallel to the major axis of the primary particle. A method of preparing the positive electrode active material precursor, and a positive electrode active material prepared by using the positive electrode active material precursor are also provided.

公开(公告)号：US20220411283A1

公开(公告)日：2022-12-29

申请号：US17773202

申请日：2021-01-29

Applicant: LG Chem, Ltd.

Inventor： Jin Hoo Jeong ,  Sang Won Woo ,  Jong Hyun Shim ,  Jin Wook Ju

IPC: C01G53/00 ,  H01M10/052

Abstract: A positive electrode active material precursor for a secondary battery is in the form of a secondary particle in which a plurality of primary particles are aggregated, wherein major axes of the primary particles are arranged in a direction from a center of the secondary particle toward a surface thereof, wherein the primary particle includes crystallines in which a (001) plane is arranged in a direction having an angle of 20° to 160° with respect to a major axis direction of the primary particle. A method of preparing the positive electrode active material precursor is also provided.

公开(公告)号：US20250149572A1

公开(公告)日：2025-05-08

申请号：US18729338

申请日：2023-06-28

Applicant: LG Chem, Ltd.

Inventor： Jin Hoo Jeong ,  Myung Gi Jeong ,  Jin Wook Ju ,  Sang Won Woo ,  Joo Kyoung Hwang ,  Jin Hee Jung ,  Ye Hyeon Gu

IPC: H01M4/525 ,  C01G53/50 ,  H01M4/36 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/42

Abstract: A positive electrode active material includes a lithium composite transition metal oxide in the form of a single particle. The lithium composite transition metal oxide includes Al, Y, and Zr. The method for preparing the positive electrode active material is also provided. Additionally, a positive electrode and a lithium secondary battery including the same are also provided.

公开(公告)号：US20230411600A1

公开(公告)日：2023-12-21

申请号：US18037860

申请日：2021-12-01

Applicant: LG Chem, Ltd.

Inventor： Jin Hoo Jeong ,  Myung Gi Jeong ,  Jin Wook Ju ,  Jong Hyun Shim ,  You Kyong Seo ,  Ye Hyeon Gu

IPC: H01M4/36 ,  C01G53/00 ,  H01M4/525 ,  H01M4/505

CPC classification number: H01M4/366 ,  C01G53/40 ,  C01G53/50 ,  H01M4/525 ,  H01M4/505 ,  C01P2002/52 ,  C01P2006/40 ,  C01P2004/84 ,  C01P2004/50 ,  C01P2004/03 ,  C01P2004/04 ,  H01M2004/021

Abstract: A positive electrode active material precursor, a method of preparing the same, and positive electrode active material prepared from the same are disclosed herein. In some embodiments, a positive electrode active material precursor includes a spherical secondary particle formed by aggregation of primary particles and includes a core portion composed of randomly oriented primary particles, a first shell portion which is formed on the first core portion and composed of the primary particles having a (001) plane oriented in a direction from a center of the secondary particle toward a surface thereof, and a second shell portion which is formed on the first shell portion and composed of randomly oriented primary particles.

公开(公告)号：US20230312366A1

公开(公告)日：2023-10-05

申请号：US18006766

申请日：2021-12-01

Applicant: LG Chem, Ltd.

Inventor： Jin Hoo Jeong ,  Myung Gi Jeong ,  Jin Wook Ju ,  You Kyong Seo ,  Jong Hyun Shim ,  Ye Hyeon Gu

IPC: C01G53/00

CPC classification number: C01G53/006 ,  C01G53/42 ,  C01P2002/76 ,  C01P2004/61 ,  C01P2004/62

Abstract: A positive electrode active material precursor is capable of achieving a positive electrode active material in the form of a single particle even by a heat treatment at a low temperature. A positive electrode active material precursor has the composition represented by Formula 1 described in the present specification and includes a composite transition metal in the form of a single particle. A method of preparing the positive electrode active material precursor and a method of preparing a positive electrode active material using the same are also provided.