公开(公告)号：US20240088379A1

公开(公告)日：2024-03-14

申请号：US18280352

申请日：2022-03-22

申请人： LG Chem, Ltd.

发明人： Won Sig Jung ,  Hwan Young Choi ,  Jong Pil Kim ,  Yeo June Yoon ,  Kang Hyeon Lee ,  Tae Young Rhee ,  Yong Jo Jung

IPC分类号： H01M4/525 ,  C01G53/00 ,  H01M4/505

CPC分类号： H01M4/525 ,  C01G53/50 ,  H01M4/505 ,  H01M2004/028

摘要： Provided is a positive electrode active material which includes an inner region that is a region from the center of the positive electrode active material particle to R/2; and an outer region that is a region from R/2 to the surface of the positive electrode active material particle, wherein R is a distance from the center of the positive electrode active material particle to the surface thereof. The positive electrode active material further includes 30% to 80% of crystallites A with respect to a total number of crystallites in the outer region of the positive electrode active material, the crystallites A having high crystallite long-axis orientation degree and crystallite c-axis orientation degree. Thus, the positive electrode active material can achieve excellent capacity characteristics and service life characteristics.

公开(公告)号：US20220320617A1

公开(公告)日：2022-10-06

申请号：US17608904

申请日：2020-12-15

申请人： LG Chem, Ltd.

发明人： Won Sig Jung ,  Tae Young Rhee ,  Hwan Young Choi

IPC分类号： H01M10/54 ,  C01D15/02

摘要： A method for separating a transition metal from a waste positive electrode material includes step 1 of preparing a waste positive electrode material represented by Formula 1, step 2 of heat treating the waste positive electrode material in an inert gas atmosphere or an oxygen atmosphere to phase separate the waste positive electrode material into a lithium oxide and a metal oxide, step 3 of cooling an obtained product of step 2 to room temperature in an inert atmosphere, and step 4 of mixing a cooled product cooled to room temperature in step 3 with distilled water, and then filtering the mixture to leach a transition metal.

公开(公告)号：US20240145672A1

公开(公告)日：2024-05-02

申请号：US18278321

申请日：2022-03-22

申请人： LG Chem, Ltd.

发明人： Won Sig Jung ,  Hwan Young Choi ,  Jong Pil Kim ,  Yeo June Yoon ,  Kang Hyeon Lee ,  Tae Young Rhee ,  Yong Jo Jung

IPC分类号： H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052

CPC分类号： H01M4/362 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  H01M2004/028

摘要： Provided is a positive electrode active material which includes an inner region that is a region from the center of the positive electrode active material particle to R/2, and an outer region that is a region from R/2 to the surface of the positive electrode active material particle, wherein R is a distance from the center of the positive electrode active material particle to the surface thereof. The positive electrode active material further includes 25% to 80% of crystallites C with respect to a total number of crystallites in the outer region. The crystallites C have a high crystallite long-axis orientation degree of 0.5 to 1 and a low crystallite c-axis orientation degree less than 0.5. Thus, the positive electrode active material has high capacity characteristics and a small amount of gas generated.

公开(公告)号：US20230268489A1

公开(公告)日：2023-08-24

申请号：US18005234

申请日：2021-08-23

申请人： LG Chem, Ltd.

发明人： Won Sig Jung ,  Yeo June Yoon ,  Kang Hyeon Lee ,  Tae Young Rhee ,  Yong Jo Jung

IPC分类号： H01M4/36 ,  H01M4/58 ,  H01M4/525 ,  H01M4/505 ,  C01G53/00

CPC分类号： H01M4/366 ,  H01M4/5825 ,  H01M4/525 ,  H01M4/505 ,  C01G53/50 ,  H01M2004/028

摘要： A method of preparing a positive electrode active material which includes a first step of preparing a cake including a lithium transition metal oxide having a lithium borate compound formed on a surface thereof by mixing a positive electrode active material precursor having a specific composition, a lithium-containing raw material, and a boron-containing raw material and sintering the mixture, and a second step of grinding the cake and washing the ground cake to prepare a lithium transition metal oxide having the lithium borate compound removed therefrom. The method reduces the problems of breaking lithium transition metal oxide during the post processing steps by reduction in cake strength and change in the strength over time, thereby providing a positive electrode active material having improved quality.

公开(公告)号：US20230142182A1

公开(公告)日：2023-05-11

申请号：US17768548

申请日：2020-10-23

申请人： LG Chem, Ltd.

发明人： Won Sig Jung ,  Kang Hyeon Lee ,  Tae Young Rhee ,  Hwan Young Choi

IPC分类号： H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525

CPC分类号： H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M2004/028

摘要： A positive electrode active material, a positive electrode including the positive electrode active material, and a lithium secondary battery including the same are disclosed herein. In some embodiments, the positive electrode active material includes a lithium transition metal oxide containing nickel in an amount of 60 mol% or greater based on a total number of moles of transition metals in the lithium transition metal oxide, and in the form of a secondary particle which is an aggregate of primary particles. The positive active material satisfies Equation (1) : -0.021x + 4.0 ≤ y ≤ -0.021x + 5.5, wherein x is a crystal grain size (nm) of the positive electrode active material, and y is a crystal grain aspect ratio of the positive electrode active material.