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公开(公告)号：US20220190326A1
公开(公告)日：2022-06-16
申请号：US17603078
申请日：2020-05-12
Applicant: LG Chem, Ltd.
Inventor： Jun Ho Eom , Chae Jin Lim , Ji Hun Jung , Dong Joon Ahn , Duck Gyun Mok
IPC: H01M4/36 , H01M4/505 , H01M4/525 , H01M4/62 , H01M4/04 , H01M10/0525 , C01G53/00 , C08K3/22 , C08K3/14
Abstract: A positive electrode active material for a secondary battery and a method of making the same are disclosed herein. In some embodiments, a positive electrode active material includes lithium composite transition metal oxide particles including 70 mol % or more of nickel (Ni) among total metals excluding lithium, and a coating portion formed on surfaces of the lithium composite transition metal oxide particles, wherein the coating portion includes a compound including fluorine and at least one selected from the group consisting of aluminum (Al), titanium (Ti), magnesium (Mg), zirconium (Zr), tungsten (W), and strontium (Sr), wherein the positive electrode active material has a Brunauer-Emmett-Teller (BET) specific surface area is in a range of 0.1 m2/g to 0.9 m2/g, and an amount of a lithium by-product on a surface of the positive electrode active material is 0.65 wt % or less based on a total weight of the positive electrode active material.
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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
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.
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3.发明授权公开(公告)号：US12211997B2
公开(公告)日：2025-01-28
申请号：US15734352
申请日：2019-06-19
Applicant: LG Chem, Ltd.
Inventor： Hyeon Hui Baek , Sung Ho Ban , Jun Ho Eom , Chae Jin Lim , Sang Jo Lee , Na Ri Park
Abstract: 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 a lithium composite transition metal oxide powder having a layered structure and a nickel content accounting for 85 atm % or more of total transition metals, and wherein the lithium composite transition metal oxide powder undergoes a 3% or less change in lithium-oxygen (Li—O) interlayer spacing in a state-of-charge (SOC) range of 58% to 72%.
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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.
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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
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.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20250038182A1
公开(公告)日：2025-01-30
申请号：US18715864
申请日：2022-12-22
Applicant: LG Chem, Ltd.
Inventor： Jun Ho Eom , Song Yi Han , Chae Jin Lim , Ji Hye Kim , Jun Won Lee , No Woo Kwak
Abstract: A positive electrode active material for a lithium secondary battery includes a lithium transition metal oxide containing nickel, cobalt, and manganese and a cobalt-containing coating layer. The lithium transition metal oxide is in the form of a secondary particle in which primary particles are aggregated. The coating layer is formed at interface between the primary particles positioned on the surface and inside of the lithium transition metal oxide secondary particle. A spectrum measured for the lithium transition metal by TEM-EELS includes a first peak in a region from a surface of a primary particle in a surface portion of the secondary particle to a depth of 50 nm, and a second peak in a region from the surface of a primary particle in a core portion of secondary particle to a depth of 50 nm. A method for preparing the positive electrode active material is also provided
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7.发明公开公开(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.
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8.发明公开公开(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.
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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.
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10.发明申请公开(公告)号：US20210226206A1
公开(公告)日：2021-07-22
申请号：US15734352
申请日：2019-06-19
Applicant: LG Chem, Ltd.
Inventor： Hyeon Hui Baek , Sung Ho Ban , Jun Ho Eom , Chae Jin Lim , Sang Jo Lee , Na Ri Park
Abstract: 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 a lithium composite transition metal oxide powder having a layered structure and a nickel content accounting for 85 atm % or more of total transition metals, and wherein the lithium composite transition metal oxide powder undergoes a 3% or less change in lithium-oxygen (Li—O) interlayer spacing in a state-of-charge (SOC) range of 58% to 72%.
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