公开(公告)号：US20240208841A1

公开(公告)日：2024-06-27

申请号：US18287931

申请日：2022-05-03

Applicant: LG Chem, Ltd.

Inventor： Na Ri Park ,  Jun Ho Eom ,  Chae Jin Lim ,  Jun Won Lee ,  No Woo Kwak ,  Ji Hye Kim ,  Byoung Hun Jung

IPC: C01G53/00 ,  H01M4/02 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052

CPC classification number: C01G53/50 ,  H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  C01P2004/03 ,  C01P2004/53 ,  C01P2004/61 ,  C01P2006/40 ,  C01P2006/90 ,  H01M2004/021 ,  H01M2004/028

Abstract: The present invention provides a positive electrode active material capable of achieving a battery having excellent capacity characteristics and life characteristics. The positive electrode active material includes a first lithium transition metal oxide and a second lithium transition metal oxide having an average particle diameter (D50) smaller than that of the first lithium transition metal oxide, wherein a particle strength of the first lithium transition metal oxide is 140 MPa or more, and a difference in particle strengths between the first lithium transition metal oxide and the second lithium transition metal oxide is 10 MPa or less. The present invention further provides a positive electrode and a lithium secondary battery which include the positive electrode active material.

公开(公告)号：US20240359999A1

公开(公告)日：2024-10-31

申请号：US18577480

申请日：2022-08-17

Applicant: LG Chem, Ltd.

Inventor： Jun Won Lee ,  No Woo Kwak ,  Jun Ho Eom ,  Chae Jin Lim ,  Na Ri Park ,  Ji Hye Kim ,  Byoung Hun Jung

IPC: C01G45/12 ,  H01M10/052

CPC classification number: C01G45/1228 ,  H01M10/052 ,  C01P2002/60 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2006/40

Abstract: A positive electrode active material includes a lithium composite transition metal oxide. The positive electrode active material is a secondary particle in which primary particles are aggregated. The primary particle includes a coating portion containing an M1 metal, and the coating portion is locally present on surfaces of the primary particles or at inter-particle boundaries of the primary particles. A preparation method thereof, and a lithium secondary battery including the positive electrode active material are also provided.

公开(公告)号：US20240234713A1

公开(公告)日：2024-07-11

申请号：US18285582

申请日：2022-08-17

Applicant: LG Chem, Ltd.

Inventor： No Woo Kwak ,  Dong Joon Ahn ,  Jun Ho Eom ,  Jun Won Lee ,  Chae Jin Lim ,  Na Ri Park ,  Ji Hye Kim ,  Byoung Hun Jung

IPC: H01M4/525 ,  C01G53/00 ,  H01M4/02 ,  H01M4/04 ,  H01M4/36 ,  H01M4/505 ,  H01M10/0525

CPC classification number: H01M4/525 ,  C01G53/50 ,  H01M4/0471 ,  H01M4/366 ,  H01M4/505 ,  C01P2002/54 ,  C01P2004/03 ,  C01P2004/61 ,  C01P2004/84 ,  C01P2006/40 ,  H01M2004/021 ,  H01M2004/028 ,  H01M10/0525

Abstract: A positive electrode material has a bimodal particle size distribution which includes a first positive electrode active material and a second positive electrode active material having different average particle diameters (D50) from each other. The first positive electrode active material includes a lithium composite transition metal oxide. The number of primary particles of the first positive electrode active material is from 6 to 30, which is measured in a cross-sectional SEM image of secondary particles having an average particle diameter (D50), wherein the average particle diameter (D50) is a particle diameter measured through a laser diffraction particle size measurement instrument at which a maximum peak of a cumulative area particle size distribution of the first positive electrode active material appears. A preparation method thereof, and a lithium secondary battery including the positive electrode material are also provided.

公开(公告)号：US20240047667A1

公开(公告)日：2024-02-08

申请号：US18267297

申请日：2022-01-21

Applicant: LG Chem, Ltd.

Inventor： Jun Ho Eom ,  No Woo Kwak ,  Ji Hye Kim ,  Byoung Hun Jung ,  Chae Jin Lim ,  Na Ri Park ,  Jun Won Lee

IPC: H01M4/525 ,  H01M4/36 ,  H01M4/505 ,  H01M4/38 ,  H01M10/0525

CPC classification number: H01M4/525 ,  H01M4/366 ,  H01M4/505 ,  H01M4/382 ,  H01M10/0525 ,  H01M2004/028

Abstract: A positive electrode active material and a method of making the same, a positive electrode including the same, and a lithium secondary battery including the same are disclosed herein. In some embodiments, a method includes (A) sintering a mixture of a positive electrode active material precursor containing 70 mol % or more of nickel (Ni), based on a total amount of metals in the precursor, and a lithium-containing raw material to prepare a pre sintered product, (B) sintering a mixture of the pre-sintered product and an aluminum-containing raw material in an oxygen atmosphere containing 20 vol % to 100 vol % of oxygen to prepare a lithium transition metal oxide, wherein a concentration of oxygen is reduced according to sintering time, and (c) heat treating a mixture of the lithium transition metal oxide and a boron-containing raw material to form a coating layer on the lithium metal oxide.

公开(公告)号：US20240038983A1

公开(公告)日：2024-02-01

申请号：US18265579

申请日：2022-01-11

Applicant: LG Chem, Ltd.

Inventor： Jun Ho Eom ,  Dong Joon Ahn ,  Chae Jin Lim ,  Na Ri Park ,  Jun Won Lee ,  No Woo Kwak ,  Ji Hye Kim ,  Byoung Hun Jung

IPC: H01M4/525 ,  H01M4/36 ,  H01M4/62 ,  H01M10/0525 ,  C01G53/00

CPC classification number: H01M4/525 ,  H01M4/366 ,  H01M4/62 ,  H01M10/0525 ,  C01G53/50 ,  H01M2004/028

Abstract: A method of preparing a positive electrode active material, a positive electrode and a lithium battery including a positive electrode active material prepared by the same are disclosed herein. In some embodiments a method includes (A) sintering on a mixture of a positive electrode active material precursor and a lithium-containing raw material to prepare a pre-sintered product, (B) sintering a mixture of the pre-sintered product and an aluminum-containing raw material to prepare a lithium transition metal oxide, and (C) heating treating a dry mixture of the lithium transition metal oxide and a boron-containing raw material to form a coating layer.

公开(公告)号：US20230369578A1

公开(公告)日：2023-11-16

申请号：US18025954

申请日：2021-12-23

Applicant: LG Chem, Ltd.

Inventor： Jun Ho Eom ,  Dong Joon Ahn ,  Chae Jin Lim ,  Na Ri Park ,  Jun Won Lee ,  No Woo Kwak ,  Ji Hye Kim ,  Byoung Hun Jung

IPC: H01M4/505 ,  H01M4/525 ,  H01M4/131 ,  H01M10/052 ,  C01G53/00

CPC classification number: H01M4/505 ,  C01G53/50 ,  H01M4/131 ,  H01M4/525 ,  H01M10/052 ,  H01M2004/021

Abstract: A positive electrode active material includes a lithium composite transition metal oxide represented by Formula 1 described in the present specification and satisfies Equation (1) described in the present specification, wherein an average particle diameter D50 of a secondary particle is in a range of 1 µm to 8 µm. A method of preparing the same, and a positive electrode material including the same are also provided.