公开(公告)号：US20250011189A1

公开(公告)日：2025-01-09

申请号：US18711264

申请日：2023-04-04

Applicant: LG Chem, Ltd.

Inventor： Woo Ram Lee ,  Dong Jin Kim ,  Sang Soon Choi ,  Jae Geun Kim

IPC: C01G53/00

Abstract: present disclosure A method for preparing a positive electrode active material capable of implementing a battery excellent in both initial capacity and lifespan properties includes (A) mixing a positive electrode active material precursor containing 80 mol % or greater of nickel (Ni) in all metals with a lithium-containing raw material, and then performing primary firing on the mixture to prepare a primary fired product, and (B) mixing the primary fired product and a nickel compound, and then performing secondary firing on the mixture to prepare a lithium transition metal oxide. The nickel compound is added such that the mol % of nickel contained in the nickel compound is greater than 0.01 mol % to less than 0.15 mol % based on the total number of moles of the metals contained in the positive electrode active material precursor.

公开(公告)号：US20230307629A1

公开(公告)日：2023-09-28

申请号：US18018616

申请日：2021-08-06

Applicant: LG Chem, Ltd.

Inventor： Na Ri Kim ,  Young Su Park ,  Woo Hyun Kim ,  Sang Soon Choi ,  Hwa Seok Chae ,  Hyun Uk Kim ,  Dong Jin Kim ,  Dong Ryoung Kang

IPC: H01M4/525 ,  H01M4/505 ,  H01M4/485 ,  H01M4/04

CPC classification number: H01M4/525 ,  H01M4/505 ,  H01M4/485 ,  H01M4/0471 ,  H01M2004/028

Abstract: A positive electrode active material precursor and method of preparing the same are disclosed herein. In some embodiments, a positive electrode active material precursor includes a particle having a first region, a second region, and a third region, a composition of the particle is represented by the following Formula 1 or Formula 2:


[M1aM2bM3cM4d](OH)2  [Formula 1]



[M1aM2bM3cM4d]O·OH  [Formula 2]

M1, M2, and M3 are different from each other and independently selected from the group consisting of Ni, Co, and Mn, M4 is at least one selected from the group consisting of B, Mg, Ca, Al, Ti, V, Cr, Fe, Zn, Ga, Y, Zr, Nb, Mo, Ta, and W, and 0

公开(公告)号：US20220231289A1

公开(公告)日：2022-07-21

申请号：US17613276

申请日：2021-03-23

Applicant: LG Chem, Ltd.

Inventor： Woo Ram Lee ,  Woo Hyun Kim ,  Dong Jin Kim ,  Hwa Seok Chae ,  Hyun Uk Kim

IPC: H01M4/525 ,  H01M4/04 ,  H01M4/505 ,  C01G53/00

Abstract: Provided is a method of manufacturing a positive electrode active material, which includes: (A) preparing a positive electrode active material precursor which includes a core portion including randomly aggregated primary particles and a shell portion surrounding the core portion and formed of primary particles oriented in a direction from a particle center to the outside and in which a ratio of a crystal grain size in the (100) plane to a crystal grain size in the (001) plane of the primary particles forming the shell portion is 3 or more; and (B) mixing the positive electrode active material precursor with a lithium-containing raw material and firing the mixture, wherein the lithium transition metal oxide has an average particle diameter (D50) that is 0.01% to 20% reduced as compared to an average particle diameter (D50) of the positive electrode active material precursor, in which a particle size is reduced during the manufacture of the positive electrode active material and thus particle strength and energy density are improved.

公开(公告)号：US20200280065A1

公开(公告)日：2020-09-03

申请号：US16646212

申请日：2018-12-05

Applicant: LG Chem, Ltd.

Inventor： Wook Jang ,  Hong Kyu Park ,  Hyo Joung Nam ,  Seong Bae Kim ,  Dong Jin Kim

IPC: H01M4/505 ,  H01M4/36 ,  H01M4/525 ,  H01M4/131 ,  H01M10/0525 ,  C01G53/00

Abstract: A positive electrode active material includes a lithium transition metal oxide represented by Formula 1, wherein the lithium transition metal oxide includes a center portion having a layered structure and a surface portion having a secondary phase with a structure different from that of the center portion. Li1±a(NixCoyM1zM2w)1−aO2  [Formula 1] In Formula 1, 0≤a≤0.2, 0.6≤x≤1, 0≤y≤0.4, 0≤z≤0.4, and 0≤w≤0.1, M1 includes at least one selected from the group consisting of manganese (Mn) and aluminum (Al), and M2 includes at least one selected from the group consisting of zirconium (Zr), boron (B), tungsten (W), molybdenum (Mo), chromium (Cr), tantalum (Ta), niobium (Nb), magnesium (Mg), cerium (Ce), hafnium (Hf), lanthanum (La), titanium (Ti), strontium (Sr), barium (Ba), fluorine (F), phosphorus (P), sulfur (S), and yttrium (Y). A method of preparing the positive active material is also provided.

公开(公告)号：US20240063380A1

公开(公告)日：2024-02-22

申请号：US18385577

申请日：2023-10-31

Applicant: LG Chem, Ltd.

Inventor： Wook Jang ,  Hong Kyu Park ,  Hyo Joung Nam ,  Seong Bae Kim ,  Dong Jin Kim

IPC: H01M4/505 ,  C01G53/00 ,  H01M4/131 ,  H01M4/36 ,  H01M4/525 ,  H01M10/0525

CPC classification number: H01M4/505 ,  C01G53/50 ,  H01M4/131 ,  H01M4/366 ,  H01M4/525 ,  H01M10/0525 ,  C01P2002/32 ,  C01P2002/90 ,  C01P2004/86 ,  C01P2006/40 ,  H01M2004/028

Abstract: A method of preparing a positive electrode active material includes mixing a positive electrode active material precursor with a lithium raw material and performing a primary heat treatment, and performing a secondary heat treatment at a temperature lower than that of the primary heat treatment to prepare a positive electrode active material. The primary heat treatment and the secondary heat treatment are respectively performed in an oxygen atmosphere. The secondary heat treatment is performed in the oxygen atmosphere with an oxygen concentration of 50% or more.

公开(公告)号：US11824193B2

公开(公告)日：2023-11-21

申请号：US17613276

申请日：2021-03-23

Applicant: LG Chem, Ltd.

Inventor： Woo Ram Lee ,  Woo Hyun Kim ,  Dong Jin Kim ,  Hwa Seok Chae ,  Hyun Uk Kim

IPC: H01M4/525 ,  H01M4/04 ,  H01M4/505 ,  C01G53/00 ,  H01M4/02

CPC classification number: H01M4/525 ,  C01G53/50 ,  H01M4/0471 ,  H01M4/0497 ,  H01M4/505 ,  C01P2002/60 ,  C01P2004/61 ,  C01P2006/40 ,  H01M2004/021 ,  H01M2004/028

Abstract: Provided is a method of manufacturing a positive electrode active material, which includes: (A) preparing a positive electrode active material precursor which includes a core portion including randomly aggregated primary particles and a shell portion surrounding the core portion and formed of primary particles oriented in a direction from a particle center to the outside and in which a ratio of a crystal grain size in the (100) plane to a crystal grain size in the (001) plane of the primary particles forming the shell portion is 3 or more; and (B) mixing the positive electrode active material precursor with a lithium-containing raw material and firing the mixture, wherein the lithium transition metal oxide has an average particle diameter (D50) that is 0.01% to 20% reduced as compared to an average particle diameter (D50) of the positive electrode active material precursor.