公开(公告)号：US12100829B2

公开(公告)日：2024-09-24

申请号：US17831580

申请日：2022-06-03

申请人： LG Chem, Ltd.

发明人： Na Ri Park ,  Sung Soon Park

IPC分类号： H01M4/04 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/02

CPC分类号： H01M4/0471 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M2004/028

摘要： A method of preparing a positive electrode active material for a secondary battery includes preparing a precursor of a composite transition metal oxide compound represented by Formula 1, and mixing the precursor, a lithium source, and a doping element source and sintering the mixture to form a doped lithium composite transition metal oxide, wherein the doping element source is a hydroxide-based compound.

Ni1−(x1+y1)Cox1May1(OH)2  [Formula 1]

wherein, Ma is at least one element selected from the group consisting of manganese (Mn) and aluminum (Al), and 0

公开(公告)号：US20240208841A1

公开(公告)日：2024-06-27

申请号：US18287931

申请日：2022-05-03

申请人： LG Chem, Ltd.

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

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

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

摘要： 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：US20210226204A1

公开(公告)日：2021-07-22

申请号：US17058851

申请日：2019-06-20

申请人： LG Chem, Ltd.

发明人： Dong Joon Ahn ,  Yeo June Yoon ,  Sung Soon Park ,  Na Ri Park

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

摘要： Provided is a lithium secondary battery which includes a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and an electrolyte, wherein the positive electrode includes, as a positive electrode active material, a lithium composite transition metal oxide powder having a layered structure and a nickel content accounting for 50 atm % or more of total transition metals, and wherein the lithium composite transition metal oxide powder has an amount of change in lithium-oxygen (Li—O) interlayer spacing (ΔT1), as represented by Equation (1), of 0 or more: ΔT1=Tf−T0  Equation (1): wherein, in Equation (1), Tf is a Li—O interlayer spacing in the lithium composite transition metal oxide in a fully charged state, and T0 is a Li—O interlayer spacing in the lithium composite transition metal oxide before charging.

公开(公告)号：US20240359999A1

公开(公告)日：2024-10-31

申请号：US18577480

申请日：2022-08-17

申请人： LG Chem, Ltd.

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

IPC分类号： C01G45/12 ,  H01M10/052

CPC分类号： C01G45/1228 ,  H01M10/052 ,  C01P2002/60 ,  C01P2004/51 ,  C01P2004/61 ,  C01P2006/40

摘要： 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

申请人： LG Chem, Ltd.

发明人： 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分类号： H01M4/525 ,  C01G53/00 ,  H01M4/02 ,  H01M4/04 ,  H01M4/36 ,  H01M4/505 ,  H01M10/0525

CPC分类号： 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

摘要： 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：US20210078868A1

公开(公告)日：2021-03-18

申请号：US16757214

申请日：2018-10-17

申请人： LG Chem, Ltd.

发明人： Jun Ho Eom ,  Sung Ho Ban ,  Hyeon Hui Baek ,  Na Ri Park

IPC分类号： C01B35/12 ,  C01G53/00

摘要： A method of preparing a positive electrode active material for a secondary battery is provided, which includes preparing a lithium composite transition metal oxide, and mixing the lithium composite transition metal oxide and a metal borate compound and performing a heat treatment to form a coating portion on surfaces of particles of the lithium composite transition metal oxide.
The positive electrode active material prepared includes lithium composite transition metal oxide particles, and a coating portion formed on surfaces of the lithium composite transition metal oxide particles, wherein the coating portion includes lithium (Li)-metal borate.

公开(公告)号：US20200350555A1

公开(公告)日：2020-11-05

申请号：US16617273

申请日：2018-10-17

申请人： LG Chem, Ltd.

发明人： Na Ri Park ,  Sung Soon Park

IPC分类号： H01M4/04 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525

摘要： A method of preparing a positive electrode active material for a secondary battery includes preparing a precursor of a composite transition metal oxide compound represented by Formula 1, and mixing the precursor, a lithium source, and a doping element source and sintering the mixture to form a doped lithium composite transition metal oxide, wherein the doping element source is a hydroxide-based compound. Ni1−(x1+y1)Cox1May1(OH)2  [Formula 1] wherein, Ma is at least one element selected from the group consisting of manganese (Mn) and aluminum (Al), and 0

公开(公告)号：US11764347B2

公开(公告)日：2023-09-19

申请号：US16652830

申请日：2018-10-17

申请人： LG Chem, Ltd.

发明人： Hyeon Hui Baek ,  Sung Ho Ban ,  Jun Ho Eom ,  Na Ri Park

IPC分类号： H01M4/04 ,  C01G53/00 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/02

CPC分类号： H01M4/0471 ,  C01G53/50 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/505 ,  H01M4/525 ,  H01M4/628 ,  H01M10/0525 ,  C01P2004/61 ,  H01M2004/028

摘要： Provided is a method of preparing a positive electrode active material, which includes preparing a mixture by mixing a lithium compound, a transition metal precursor, and a metal oxide additive, and sintering the mixture to form a lithium transition metal oxide, wherein the sintering is performed through two-stage temperature holding sections, a temperature of a first temperature holding section is in a range of 400° C. to 650° C., and a temperature of a second temperature holding section is in a range of 700° C. to 900° C. A positive electrode including a positive electrode active material prepared according to the method, and a lithium secondary battery including the positive electrode is also provided.

公开(公告)号：US11482702B2

公开(公告)日：2022-10-25

申请号：US16638321

申请日：2019-02-26

申请人： LG Chem, Ltd.

发明人： Jun Ho Eom ,  Sung Ho Ban ,  Hyeon Hui Baek ,  Na Ri Park

IPC分类号： H01M4/525 ,  H01M4/04 ,  H01M4/131 ,  H01M4/36 ,  H01M4/505 ,  H01M4/66 ,  H01M10/0525 ,  H01M50/46 ,  H01M4/02

摘要： A method for preparing a positive electrode active material and a positive electrode active material prepared by the method are provided. The method includes preparing a lithium composite transition metal oxide represented by Formula 1, and washing the lithium composite transition metal oxide with a cleaning liquid containing cleaning water and a surfactant. The cleaning liquid contains cleaning water in an amount of no less than 50 parts by weight and less than 400 parts by weight based on 100 parts by weight of the lithium composite transition metal oxide.

公开(公告)号：US20210226205A1

公开(公告)日：2021-07-22

申请号：US15734056

申请日：2019-06-19

申请人： LG Chem, Ltd.

发明人： Na Ri Park ,  Yeo June Yoon ,  Sung Ho Ban ,  Jun Ho Eom ,  Hyeon Hui Baek ,  Ki Cheol Shin

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

摘要： Provided is a lithium secondary battery including a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and an electrolyte, wherein the positive electrode includes, as a positive electrode active material, a lithium composite transition metal oxide powder having a layered structure and a nickel content accounting for 50 atm % or more of total transition metals, and wherein the layered structure of the positive electrode active material is phase-transformed into a spinel structure at a temperature of 300° C. or more in a fully charged state.