公开(公告)号：US20250149571A1

公开(公告)日：2025-05-08

申请号：US18836917

申请日：2023-02-10

Applicant: LG Energy Solution, Ltd.

Inventor： Hyuck Hur ,  Sin Young Park ,  Gi Beom Han ,  Dong Hwi Kim ,  Min Kwak ,  Seul Ki Chae ,  Kang Joon Park ,  Wang Mo Jung

IPC: H01M4/505 ,  C01G53/50 ,  H01M4/02 ,  H01M4/36 ,  H01M4/48 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/42

Abstract: The present invention relates to positive electrode active material powder including overlithiated manganese-based oxide particles, which are represented by the disclosed Formula 1 and are in the form of a single particle composed of one nodule or a pseudo-single particle that is a composite of 2 to 30 or less nodules, and a positive electrode and a lithium secondary battery which include the positive electrode active material powder.

公开(公告)号：US20250118743A1

公开(公告)日：2025-04-10

申请号：US18294616

申请日：2022-10-05

Applicant: LG Energy Solution, Ltd.

Inventor： Byung Chun Park ,  Wang Mo Jung ,  Sin Young Park ,  Hyuck Hur ,  Dong Hwi Kim

IPC: H01M4/505 ,  H01M4/02 ,  H01M4/36 ,  H01M4/38 ,  H01M4/583 ,  H01M4/62

Abstract: The present invention relates to a lithium secondary battery which includes a positive electrode including an overlithiated manganese-based oxide, in which an amount of manganese among total metals excluding lithium is greater than 50 mol % and a ratio (Li/Me) of the number of moles of the lithium to the number of moles of the total metals excluding the lithium is greater than 1, as a positive electrode active material; a negative electrode including a silicon-based negative electrode active material; a separator disposed between the positive electrode and the negative electrode; and an electrolyte, and satisfies Equation (1). 0.25 A ≤ B ≤ 0 . 6 ⁢ A Equation ⁢ ( 1 ) In Equation (1), A is a discharge curve area in a voltage range of 2.0 V to 4.6 V of a dQ/dV graph obtained by differentiating a graph of battery discharge capacity Q and voltage V after one cycle which are measured while charging the lithium secondary battery at 0.1 C to 4.6 V and then discharging the lithium secondary battery at 0.1 C to 2.0 V, and B is a discharge curve area in a voltage range of 2.0 V to 3.5 V of the dQ/dV graph.

公开(公告)号：US20230387399A1

公开(公告)日：2023-11-30

申请号：US18027688

申请日：2021-10-22

Applicant: LG Energy Solution, Ltd.

Inventor： So Ra Baek ,  Hak Yoon Kim ,  Hyuck Hur ,  Dong Hwi Kim ,  Hyeong Il Kim ,  Seul Ki Chae ,  Wang Mo Jung ,  Dong Hun Lee

IPC: H01M4/38 ,  H01M10/0525 ,  H01M4/04 ,  H01M4/525

CPC classification number: H01M4/386 ,  H01M10/0525 ,  H01M4/0404 ,  H01M4/525 ,  H01M4/0471 ,  H01M2004/021

Abstract: A method of preparing a lithium secondary battery includes:



(1) mixing a small particle lithium composite transition metal oxide having an average particle diameter (D50) of less than 7 μm with a boron-containing raw material and performing a heat treatment, mixing a large particle lithium composite transition metal oxide having an average particle diameter (D50) of 8 μm or more with a cobalt-containing raw material and a boron-containing raw material and performing a heat treatment,
mixing the first positive electrode active material and the second positive electrode active material to prepare a positive electrode material having a bimodal particle diameter distribution, preparing a positive electrode by coating the positive electrode material on a positive electrode collector, and assembling the positive electrode, a negative electrode including a silicon-based negative electrode active material, and a separator.