公开(公告)号：US12191488B2

公开(公告)日：2025-01-07

申请号：US18540301

申请日：2023-12-14

Applicant: LG Energy Solution, Ltd.

Inventor： Eun Sol Lho ,  Jin Tae Hwang ,  Su Yeon Oh ,  Byung Chun Park ,  Sang Min Park ,  Sang Wook Lee ,  Seul Ki Kim ,  Hyeong Ii Kim

IPC: H01M4/525 ,  H01M4/36 ,  H01M4/485 ,  H01M10/052 ,  H01M4/02

Abstract: A positive electrode active material includes a nickel-based lithium composite metal oxide having a Ni content of 80 atm % or greater among transition metals except lithium, and in the form of a single particle or pseudo-single particle. The nickel-based lithium composite metal oxide has a coating layer positioned on the surface thereof, wherein the coating layer contains cobalt. The positive electrode active material also satisfies [Equation 1] 1≤XY/Z≤3, wherein X is the molar number (mol %) of Co in the coating layer based on 100 moles of the nickel-based lithium composite metal oxide, Y is the average particle diameter (μm) of nodules of the nickel-based lithium composite metal oxide, and Z is D50 (μm) of the positive electrode active material, wherein Z is from 5 μm to 12 μm.

公开(公告)号：US20240213471A1

公开(公告)日：2024-06-27

申请号：US18540301

申请日：2023-12-14

Applicant: LG Energy Solution, Ltd.

Inventor： Eun Sol Lho ,  Jin Tae Hwang ,  Su Yeon Oh ,  Byung Chun Park ,  Sang Min Park ,  Sang Wook Lee ,  Seul Ki Kim ,  Hyeong II Kim

IPC: H01M4/525 ,  H01M4/36 ,  H01M4/485 ,  H01M10/052

CPC classification number: H01M4/525 ,  H01M4/366 ,  H01M4/485 ,  H01M10/052 ,  H01M2004/028

Abstract: A positive electrode active material includes a nickel-based lithium composite metal oxide having a Ni content of 80 atm % or greater among transition metals except lithium, and in the form of a single particle or pseudo-single particle. The nickel-based lithium composite metal oxide has a coating layer positioned on the surface thereof, wherein the coating layer contains cobalt. The positive electrode active material also satisfies [Equation 1] 1≤XY/Z≤3, wherein X is the molar number (mol %) of Co in the coating layer based on 100 moles of the nickel-based lithium composite metal oxide, Y is the average particle diameter (μm) of nodules of the nickel-based lithium composite metal oxide, and Z is D50 (μm) of the positive electrode active material, wherein Z is from 5 μm to 12 μm.

公开(公告)号：US20240313210A1

公开(公告)日：2024-09-19

申请号：US18677050

申请日：2024-05-29

Applicant: LG Energy Solution, Ltd.

Inventor： Gi Beom Han ,  Sang Min Park ,  Ji Hye Kim ,  Tae Gu Yoo ,  Wang Mo Jung

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

CPC classification number: H01M4/505 ,  H01M4/0471 ,  H01M4/366 ,  H01M4/525 ,  H01M10/0525 ,  H01M2004/028

Abstract: A positive electrode active material for a secondary battery is provided, which includes a lithium composite transition metal oxide including nickel (Ni), cobalt (Co), and manganese (Mn), wherein a particle of the lithium composite transition metal oxide includes a core portion and a resistance portion formed on a surface of the core portion, and is composed of a single particle, wherein the core portion has a layered crystal structure of space group R-3m, and the resistance portion has a cubic rock-salt structure of space group Fm-3m.

公开(公告)号：US20230352654A1

公开(公告)日：2023-11-02

申请号：US17922839

申请日：2021-12-23

Applicant: LG Energy Solution, Ltd.

Inventor： Dae Jin Lee ,  Sang Min Park ,  Min Kwak ,  Wang Mo Jung ,  Gi Beom Han ,  Sang Wook Lee ,  Eun Sol Lho ,  Joong Yeop Do ,  Kang Joon Park

IPC: H01M4/36 ,  H01M4/525 ,  H01M4/505 ,  H01M4/485 ,  H01M4/04 ,  H01M4/62

CPC classification number: H01M4/364 ,  H01M4/525 ,  H01M4/505 ,  H01M4/485 ,  H01M4/0471 ,  H01M4/626 ,  H01M2004/028

Abstract: A method of preparing a positive electrode active material is disclosed herein. The method may ensure surface and coating uniformity of first and second lithium transition metal oxides in the positive electrode active material. In some embodiments, the method includes washing a mixture of a first lithium transition metal oxide having a first Brunauer-Emmett-Teller (BET) specific surface area and a second lithium transition metal oxide having a second BET specific surface area with a washing solution, an amount of the washing solution based on 100 parts by weight of the mixture satisfies Equation 1: 5,000×(x1w1+x2w2)≤the amount of the washing solution ≤15,000×(x1w1+x2w2), x1 and x2 are the first and second BET specific surface areas, respectively, and w1 and w2 are weight ratios of the first and second lithium transition metal oxides based on a total weight of the mixture, respectively.

公开(公告)号：US20220336806A1

公开(公告)日：2022-10-20

申请号：US17640616

申请日：2020-09-11

Applicant: LG Energy Solution, Ltd.

Inventor： Eun Sol Lho ,  Sang Min Park ,  Sung Bin Park ,  Seul Ki Kim ,  Wen Xiu Wang ,  Wang Mo Jung

IPC: H01M4/525 ,  H01M10/0525 ,  H01M4/131 ,  H01M4/134 ,  H01M4/36

Abstract: The present invention relates to a positive electrode material for a secondary battery, the positive electrode material including a first positive electrode active material and a second positive electrode active material, the first positive electrode active material and the second positive electrode active material being single particle types and lithium composite transition metal oxides including nickel, cobalt, and manganese and having a nickel content accounting for 60 mol % or more of total metals except for lithium, wherein the first positive electrode active material has a mean particle diameter (D50) of 3 μm or less and a molar ratio (Li/M) of lithium to the metals (M) except for lithium of 1.10 to 1.20, and the second positive electrode active material has a mean particle diameter (D50) of greater than 3 μm and a molar ratio (Li/M) of lithium to the metals (M) except for lithium of 1.00 to 1.13.

公开(公告)号：US20230420669A1

公开(公告)日：2023-12-28

申请号：US18038923

申请日：2021-11-30

Applicant: LG Energy Solution, Ltd.

Inventor： Sang Wook Lee ,  Dae Jin Lee ,  Sang Min Park ,  Min Kwak ,  Wang Mo Jung ,  Gi Beom Han ,  Eun Sol Lho ,  Joong Yeop Do ,  Kang Joon Park

IPC: H01M4/525 ,  H01M4/505 ,  H01M10/052

CPC classification number: H01M4/525 ,  H01M4/505 ,  H01M10/052 ,  H01M2004/028

Abstract: The present invention relates to a positive electrode active material having low nickel disorder and high particle strength in a crystal structure, and capable of implementing a battery having excellent capacity properties and capacity retention, and a positive electrode and a lithium secondary battery including the same, wherein the positive electrode active material includes a large-diameter lithium transition metal oxide and a small-diameter lithium transition metal oxide whose average particle diameter (D50) is smaller than that of the large-diameter lithium transition metal oxide, wherein the large-diameter lithium transition metal oxide and the small-diameter lithium transition metal oxide each independently have a composition represented by Formula 1, and has a crystal grain size of 100 nm to 150 nm, wherein the difference in crystal grain size between the large-diameter lithium transition metal oxide and the small-diameter lithium transition metal oxide is less than 40 nm, and the positive electrode active material has a nickel disorder (Ni-disorder) of 1.5% or less.

公开(公告)号：US20230034497A1

公开(公告)日：2023-02-02

申请号：US17788814

申请日：2021-01-29

Applicant: LG Energy Solution, Ltd.

Inventor： Sang Min Park ,  Eun Sol Lho ,  Sung Bin Park ,  Seul Ki Kim ,  Wen Xiu Wang ,  Joong Yeop Do ,  Wang Mo Jung

IPC: H01M4/525 ,  H01M4/485 ,  H01M4/505 ,  H01M4/04 ,  H01M10/052

Abstract: A positive electrode active material, method of making the same, and positive electrode and lithium secondary battery include the same are disclosed herein. In some embodiments, a positive electrode active material in a form of single particles, includes a lithium transition metal oxide having nickel (Ni) in an amount greater than 50 mol % based on a total number of moles of transition metals excluding lithium, wherein a single particle has a region of 50 nm or less from a surface of the single particle along a center direction, and wherein a structure belonging to space group FD3-M and a structure belonging to space group Fm3m are formed in the region, and wherein a generation rate of fine powder having an average particle diameter (D50) of 1 μm or less is in a range of 5% to 30% when the positive electrode active material is rolled at 650 kgf/cm2.

公开(公告)号：US20250054942A1

公开(公告)日：2025-02-13

申请号：US18723063

申请日：2022-12-22

Applicant: LG Energy Solution, Ltd.

Inventor： Eun Sol Lho ,  Gi Beom Han ,  Jong Woo Kim ,  Wang Mo Jung ,  Sang Min Park ,  Sang Wook Lee ,  Seul Ki Kim ,  Hyeong II Kim

IPC: H01M4/131 ,  H01M4/02 ,  H01M4/36 ,  H01M4/525 ,  H01M4/62 ,  H01M10/0525

Abstract: A positive electrode for a lithium secondary battery includes a collector; and a positive electrode active material layer disposed on at least one surface of the collector, wherein the ratio of a peak intensity of a (003) plane to a peak intensity of a (101) plane of the positive electrode measured by X-ray diffraction analysis is 8 or more.

公开(公告)号：US20230095804A1

公开(公告)日：2023-03-30

申请号：US17795049

申请日：2021-01-19

Applicant: LG Energy Solution, Ltd.

Inventor： Sang Min Park ,  Eun Sol Lho ,  Sung Bin Park ,  Seul Ki Kim ,  Wen Xiu Wang ,  Wang Mo Jung

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

Abstract: A positive electrode active material, and a positive electrode and a lithium secondary battery including the same are disclosed herein. In some embodiments, a positive electrode active material includes a lithium composite transition metal oxide containing nickel, cobalt, and manganese and having a nickel content for 60 mol % or more, based on metals (M) excluding lithium, and is in the form of single particles having an average particle diameter (D50) of 1 to 10 μm, wherein a 100-nm region extending from the surface toward the center of a single particle has crystal structures of a Fd3M and a Fm3m space group, and a phase ratio is 0.2 to 0.7, which is a ratio of a first portion of a maximum straight length of the 100-nm region occupied by the crystal structure of the Fd3M space group to a second portion occupied by the crystal structure of the Fm3m space group.

公开(公告)号：US20240270603A1

公开(公告)日：2024-08-15

申请号：US18573109

申请日：2022-11-02

Applicant: LG Energy Solution, Ltd.

Inventor： Eun Sol Lho ,  Gi Beom Han ,  Jong Woo Kim ,  Wang Mo Jung ,  Sang Min Park ,  Sang Wook Lee ,  Seul Ki Kim ,  Hyeong ll Kim

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

CPC classification number: C01G53/50 ,  H01M4/525 ,  H01M10/052 ,  H01M10/4235 ,  C01P2006/40 ,  H01M2004/028

Abstract: The present invention relates to a method of preparing a positive electrode active material for a lithium secondary battery and a positive electrode active material prepared thereby, wherein the preparation method includes a first step of preparing a lithium transition metal oxide by mixing a lithium raw material and a transition metal precursor containing 70 mol % or more of nickel based on the total number of moles of transition metals and sintering the mixture; and a second step of washing the lithium transition metal oxide with hot water of more than 90° C., wherein, after the second step, a result of EELS analysis of a particle surface of the lithium transition metal oxide satisfies Equation 1.