公开(公告)号：US20230246180A1

公开(公告)日：2023-08-03

申请号：US18004263

申请日：2022-06-02

Applicant: LG Energy Solution, Ltd.

Inventor： Chi Ho Jo ,  Wang Mo Jung ,  Hye Hyeon Kim ,  Tae Gu Yoo ,  Jin Tae Hwang ,  Hae Jung Jung ,  Jong Wook Heo

IPC: H01M4/505 ,  H01M4/04 ,  H01M4/587 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/525 ,  H01M10/052 ,  H01M4/02

CPC classification number: H01M4/505 ,  H01M4/0404 ,  H01M4/587 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/525 ,  H01M10/052 ,  H01M2004/028

Abstract: Provided are a positive electrode for a lithium secondary battery and a lithium secondary battery containing the same. The positive electrode includes a positive electrode current collector and a positive electrode mixture layer disposed thereon and includes a positive electrode active material, a positive electrode additive represented by Formula 1 (LipCo(1-q)M1qO4), a conductive material, and a binder. Furthermore, Equation 1 (RLCZO/R0) is 1.55 or less, wherein RLCO represents an electrode sheet resistance when the positive electrode additive represented by Formula 1 is contained in the positive electrode mixture layer, and R0 represents an electrode sheet resistance when the positive electrode additive represented by Formula 1 is not contained in the positive electrode mixture layer. The positive electrode is manufactured using a pre-dispersion containing the positive electrode additive in a positive electrode mixture layer as an irreversible additive.

公开(公告)号：US20230178724A1

公开(公告)日：2023-06-08

申请号：US17917670

申请日：2022-02-15

Applicant: LG Energy Solution, Ltd.

Inventor： Shul Kee Kim ,  Sang Seung Oh ,  Hye Hyeon Kim ,  Sung Chul Lim ,  Chi Ho Jo

IPC: H01M4/525 ,  H01M10/052 ,  H01M4/36 ,  H01M4/583 ,  H01M4/38 ,  H01M4/62

CPC classification number: H01M4/525 ,  H01M10/052 ,  H01M4/364 ,  H01M4/583 ,  H01M4/386 ,  H01M4/625 ,  H01M4/623 ,  H01M4/366 ,  H01M2004/028

Abstract: An electrode assembly having a high energy density and a lithium secondary battery including the same are disclosed herein. The electrode assembly includes a positive electrode in which a positive electrode mixture layer includes a positive electrode active material and a positive electrode additive and a negative electrode in which a negative electrode mixture layer includes graphite mixed with silicon (Si)-containing particles. The amount of gas generated during charging and discharging of a battery is reduced, the resistance change rate of the electrode is low even after charging and discharging, and accordingly, a lithium secondary battery including the electrode assembly has a high energy density, a long lifetime, and good quick charging efficiency.

公开(公告)号：US20250070134A1

公开(公告)日：2025-02-27

申请号：US18723145

申请日：2022-12-23

Applicant: LG Energy Solution, Ltd.

Inventor： Chi Ho Jo ,  Wang Mo Jung ,  Tae Gu Yoo ,  Jin Tae Hwang ,  Hae Jung Jung ,  Jong Wook Heo ,  Hyeon Jin Cho

IPC: H01M4/36 ,  C01G53/00 ,  H01M4/02 ,  H01M4/525 ,  H01M4/62 ,  H01M10/052

Abstract: A positive electrode active material includes lithium nickel-based oxide particles having a single-particle form composed of a single nodule or a single-particle-like form, which is a complex of at most 30 nodules. The positive electrode active material further includes a coating layer formed on the surface of the lithium nickel-based oxide particles, wherein the coating layer is formed by using a nano-sized coating precursor which is a chelate complex comprising lithium, nickel, cobalt, and Ma, where Ma is Mn, Al, or a combination thereof.

公开(公告)号：US20250006906A1

公开(公告)日：2025-01-02

申请号：US18756937

申请日：2024-06-27

Applicant: LG Energy Solution, Ltd.

Inventor： Jong Woo Kim ,  Ji Young Ju ,  Tae Gu Yoo ,  Seung Su Yoo ,  Byung Chun Park ,  Chi Ho Jo

IPC: H01M4/36 ,  C01G53/00 ,  H01M4/02 ,  H01M4/131 ,  H01M4/134 ,  H01M4/46 ,  H01M4/525 ,  H01M10/052

Abstract: A positive electrode active material includes a lithium composite transition metal oxide in the form of a single particle composed of one single nodule and/or in the form of a pseudo-single particle, which is a composite of 30 or less nodules, and a coating layer formed on the surface of the lithium composite transition metal oxide particle. The coating layer contains aluminum (Al) and tungsten (W). The positive electrode active material satisfies Equation 1 below: 45≤X×X′≤56  [Equation 1] wherein, X is the content of nickel among all metals except for lithium in the lithium composite transition metal oxide (unit: mol %), and X′ is the BET specific surface area of the positive electrode active material (unit: m2/g).

公开(公告)号：US20240014379A1

公开(公告)日：2024-01-11

申请号：US18025580

申请日：2022-05-06

Applicant: LG Energy Solution, Ltd.

Inventor： Gwang Yeon Kim ,  Sang Seung Oh ,  Hye Hyeon Kim ,  Chi Ho Jo

IPC: H01M4/1391 ,  H01M4/505 ,  H01M4/525 ,  H01M4/04 ,  H01M10/0525 ,  H01M4/36

CPC classification number: H01M4/1391 ,  H01M4/505 ,  H01M4/525 ,  H01M4/0435 ,  H01M10/0525 ,  H01M4/364 ,  H01M4/366 ,  H01M2004/028

Abstract: Provided is a positive electrode for a lithium secondary battery with improved structural stability, a manufacturing method thereof, and a lithium secondary battery including the same. When the positive electrode containing a positive electrode additive is manufactured, the conditions of first and second rolling operations are controlled so that there is an advantage in that structures and electrical properties of a first mixture layer and a second mixture layer can be improved.

公开(公告)号：US20230369602A1

公开(公告)日：2023-11-16

申请号：US18025980

申请日：2022-05-06

Applicant: LG Energy Solution, Ltd.

Inventor： Ji Hye Kim ,  Sang Seung Oh ,  Hye Hyeon Kim ,  Chi Ho Jo ,  Tae Gu Yoo

IPC: H01M4/62 ,  H01M4/131

CPC classification number: H01M4/628 ,  H01M4/131 ,  H01M2004/028

Abstract: The present technology relates to a positive electrode additive for a lithium secondary battery and a positive electrode for a lithium secondary battery including the same, wherein the positive electrode additive contains a carbon material on a surface of a lithium cobalt oxide represented by Chemical Formula 1 to improve the low electrical conductivity of the positive electrode additive, and an effect of improving the problem caused by the amount of gases generated during initial charging and discharging (i.e., “activation”) is excellent, and thus a positive electrode and lithium secondary battery including the positive electrode additive have excellent electrical performance.

公开(公告)号：US20230261168A1

公开(公告)日：2023-08-17

申请号：US18003788

申请日：2022-05-06

Applicant: LG Energy Solution, Ltd.

Inventor： Gwang Yeon Kim ,  Sang Seung Oh ,  Hye Hyeon KIM ,  Chi Ho Jo

IPC: H01M4/04 ,  H01M4/525 ,  H01M4/505 ,  H01M4/131

CPC classification number: H01M4/0404 ,  H01M4/0435 ,  H01M4/525 ,  H01M4/505 ,  H01M4/131 ,  H01M2004/028

Abstract: Provided are a positive electrode including a positive electrode additive, a method of manufacturing the positive electrode, and a lithium secondary battery including the positive electrode. A coating temperature of a slurry is adjusted when the positive electrode is manufactured, and thus the deformation of the positive electrode additive due to temperature is minimized, and accordingly, structural deformation of the positive electrode additive included in the positive electrode is prevented.

公开(公告)号：US20230128140A1

公开(公告)日：2023-04-27

申请号：US17915607

申请日：2022-02-09

Applicant: LG Energy Solution, Ltd.

Inventor： Tae Gu Yoo ,  Wang Mo Jung ,  Chi Ho Jo ,  Ji Hye Kim ,  Hae Jung Jung ,  Jong Wook Heo

IPC: H01M4/62

Abstract: A disclosure sacrificial positive electrode material with reduced gas generation and a method of preparing the same are disclosed herein. In some embodiments, a method includes calcining a mixture of lithium oxide (Li2O) and cobalt oxide (CoO) in an atmosphere containing an inert gas and oxygen gas and having a relative humidity of 20% or less, wherein the oxygen gas is at a partial pressure of 1% or less, to prepare a lithium cobalt metal oxide represented by Chemical Formula (1): LixCo(1-y)MyO4-zAz  [Chemical Formula 1] M is at least one selected from the group consisting of Ti, Al, Zn, Zr, Mn and Ni, A is a halogen, x, y and z are 5≤x≤7, 0≤y≤0.4, and 0≤z≤0.001. A battery having the sacrificial positive electrode material can have reduced gas generation in the electrode assembly at the time of charging the battery, and thus the stability and life of the battery are improved.

公开(公告)号：US20230115280A1

公开(公告)日：2023-04-13

申请号：US17914928

申请日：2022-02-10

Applicant: LG Energy Solution, Ltd.

Inventor： Tae Gu Yoo ,  Wang Mo Jung ,  Chi Ho Jo ,  Ji Hye Kim ,  Hae Jung Jung ,  Jong Wook Heo

IPC: H01M4/525 ,  H01M4/505 ,  H01M4/62

Abstract: A sacrificial positive electrode material, a positive electrode comprising the same, and a lithium secondary battery having the positive electrode are disclosed herein. In some embodiments, a sacrificial positive electrode material includes a lithium cobalt oxide represented by the following Chemical Formula 1, wherein the sacrificial positive electrode active material has a defect formation energy of metal (M) of −4.0 to −8.5 eV, calculated using density functional theory (DFT): LixCo(1-y)MyO4   [Chemical Formula 1] M is at least one selected from the group consisting of Al, Fe, Zn, Ti, W, Mg, Ge and Si, pa x and y are 5≤x≤7 and 0.05≤y≤0.6. When the defect formation energy of the metal is controlled within a specific range, a high initial charging/discharging efficiency is realized during initial charging/discharging, and the amount of gas additionally generated at the later time of charging/discharging is reduced. Thus, stability and the charging/discharging performance of a battery is improved.

公开(公告)号：US20230086038A1

公开(公告)日：2023-03-23

申请号：US17941208

申请日：2022-09-09

Applicant: LG Energy Solution, Ltd.

Inventor： Jong Wook Heo ,  Wang Mo Jung ,  Chi Ho Jo ,  Tae Gu Yoo ,  Jin Tae Hwang ,  Hae Jung Jung ,  Hyeon Jin Cho

IPC: H01M4/525 ,  H01M4/505 ,  H01M4/36 ,  H01M4/62 ,  H01M4/131 ,  C01G53/00

Abstract: A positive electrode active material powder for a lithium secondary battery, which includes a lithium composite transition metal oxide in the form of a single particle consisting of one nodule, or a pseudo-single crystal, which is a composite of 30 or less nodules, where the positive electrode active material powder satisfies Expression 1: 0.5≤Dmean33 dpress/D50≤3.Where Dmean is an average particle diameter of the nodules as measured using an electron backscatter diffraction (EBSD) pattern analyzer, dpress is a press density measured after 5 g of the positive electrode active material powder is input into a circular mold with a diameter of 2 cm and pressurized at a pressure of 2000 kgf, and D50 is a value corresponding to a cumulative volume of 50% in the particle size distribution of the positive electrode active material powder.