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31.
公开(公告)号:US20230163295A1
公开(公告)日:2023-05-25
申请号:US18100778
申请日:2023-01-24
Applicant: LG Energy Solution, Ltd.
Inventor: Tae Gu Yoo , Younguk Park , Jintae Hwang , Wang Mo Jung , Sungbin Park
IPC: H01M4/525 , C01G53/00 , H01M4/505 , H01M10/0525
CPC classification number: H01M4/525 , C01G53/50 , H01M4/505 , H01M10/0525 , C01P2002/52 , C01P2002/60 , C01P2004/03 , C01P2004/04 , C01P2004/61 , C01P2006/40 , H01M2004/028
Abstract: Exemplary embodiments of positive electrode active materials in the form of single particles, and a method of preparing each of them, are provided. The single particles of the exemplary embodiments include single particles of a nickel-based lithium composite metal oxide, having a plurality of crystal grains, each having a size of 180 nm to 300 nm, as analyzed by a Cu Kα X-ray (X-rα). The single particles include a metal doped in the crystal lattice thereof. One embodiment includes a surface coating. The total content of the metal doped in the crystal lattice thereof and the metal of the metal oxide coated on the surface thereof is controlled in the range of 2500 ppm to 6000 ppm.
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32.
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.
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33.
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
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.
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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
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.
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公开(公告)号:US20220328838A1
公开(公告)日:2022-10-13
申请号:US17615982
申请日:2020-09-28
Applicant: LG Energy Solution, Ltd.
Inventor: Tae Gon Kim , Sin Young Park , Bo Ram Lee , Hyung Man Cho , Tae Gu Yoo , Min Kwak
IPC: H01M4/62 , H01M10/052
Abstract: An electrode includes an electrode active material layer, wherein the electrode active material layer includes an electrode active material and a conductive agent, wherein the conductive agent includes graphene, and a carbon nanotube structure in which 2 to 5,000 single-walled carbon nanotube units are bonded to each other, and the carbon nanotube structure is included in an amount of 0.01 wt % to 0.5 wt % in the electrode active material layer. A secondary battery including the same is also provided.
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公开(公告)号:US12266800B2
公开(公告)日:2025-04-01
申请号:US17598617
申请日:2020-09-28
Applicant: LG Energy Solution, Ltd.
Inventor: Tae Gon Kim , Sin Young Park , Bo Ram Lee , Hyung Man Cho , Tae Gu Yoo , Min Kwak
Abstract: An electrode includes an electrode active material layer, wherein the electrode active material layer includes an electrode active material and a conductive agent, wherein the conductive agent includes a first conductive agent and a second conductive agent, wherein the first conductive agent includes a secondary particle in which a plurality of graphene sheets are arranged in different directions and a portion of one graphene sheet is connected to a portion of adjacent another graphene sheet, the second conductive agent includes a carbon nanotube structure in which 2 to 5,000 single-walled carbon nanotube units are bonded to each other, and the carbon nanotube structure is included in an amount of 0.01 wt % to 0.5 wt % in the electrode active material layer. A secondary battery including the electrode is also provided.
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37.
公开(公告)号:US12249712B2
公开(公告)日:2025-03-11
申请号:US18609708
申请日:2024-03-19
Applicant: LG Energy Solution, Ltd.
Inventor: Tae Gu Yoo , Younguk Park , Jintae Hwang , Wang Mo Jung , Sungbin Park
Abstract: A positive electrode active material in the form of a single particle and a lithium secondary battery containing the positive electrode active material thereof are provided. The positive electrode active material has a nickel-based lithium composite metal oxide single particle. The single particle includes a metal doped in the crystal lattice thereof. The single particle includes, in the crystal lattice, a surface part having a rock salt structure, a spinel structure, or a mixed structure thereof from a surface of the single particle to a depth of 0.13% to 5.26% of a radius of the single particle, and a central part having a layered structure from an interface with the surface part thereof to the center part of the single particle.
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公开(公告)号:US20250062314A1
公开(公告)日:2025-02-20
申请号:US18936380
申请日:2024-11-04
Applicant: LG Energy Solution, Ltd.
Inventor: Tae Gu Yoo , Young Uk Park , Jin Tae Hwang , Wang Mo Jung , Sung Bin Park
IPC: H01M4/131 , H01M4/02 , H01M4/04 , H01M4/134 , H01M4/1391 , H01M4/1395 , H01M4/36 , H01M4/525 , H01M10/0525
Abstract: A positive electrode active material includes a lithium transition metal oxide and a coating element M3-containing coating layer formed on a surface of the lithium transition metal oxide, wherein M3 comprises at least one of Al, Ti, Mg, Zr, W, Y, Sr, or Co, wherein the lithium transition metal oxide is doped with a doping element M2, wherein M2 includes at least one of Al, Ti, Mg, Zr, W, Y, Sr, Co, F, Si, Na, Cu, Fe, Ca, S, or B, wherein the lithium transition metal oxide has a single particle form, and includes a center portion having a layered structure and a surface portion having a rock-salt structure, and the total amount of the doping element M2 and the coating element M3 is in a range of 4,580 ppm to 9,120 ppm based on a total weight of the positive electrode active material.
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公开(公告)号:US20240194852A1
公开(公告)日:2024-06-13
申请号:US18411502
申请日:2024-01-12
Applicant: LG Energy Solution, Ltd.
Inventor: Tae Gu Yoo , Yong Uk Park , Jin Tae Hwang , Wang Mo Jung , Sung Bin Park
IPC: H01M4/131 , H01M4/02 , H01M4/04 , H01M4/134 , H01M4/1391 , H01M4/1395 , H01M4/36 , H01M4/525 , H01M10/0525
CPC classification number: H01M4/131 , H01M4/0471 , H01M4/134 , H01M4/1391 , H01M4/1395 , H01M4/364 , H01M4/366 , H01M4/525 , H01M10/0525 , H01M2004/028
Abstract: A positive electrode active material includes a lithium transition metal oxide and a coating element M3-containing coating layer formed on a surface of the lithium transition metal oxide, wherein M3 comprises at least one of Al, Ti, Mg, Zr, W, Y, Sr, or Co, wherein the lithium transition metal oxide is doped with a doping element M2, wherein M2 includes at least one of Al, Ti, Mg, Zr, W, Y, Sr, Co, F, Si, Na, Cu, Fe, Ca, S, or B, wherein the lithium transition metal oxide has a single particle form, and includes a center portion having a layered structure and a surface portion having a rock-salt structure, and the total amount of the doping element M2 and the coating element M3 is in a range of 4,580 ppm to 9,120 ppm based on a total weight of the positive electrode active material.
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40.
公开(公告)号:US20240014400A1
公开(公告)日:2024-01-11
申请号:US18025254
申请日:2022-04-19
Applicant: LG Energy Solution, Ltd.
Inventor: Gyeong Seop Lee , Sang Seung Oh , Hye Hyeon Kim , Chi Ho Jo , Tae Gu Yoo
CPC classification number: H01M4/628 , H01M4/131 , H01M4/625 , H01M10/052 , H01M4/0404 , H01M4/525 , H01M4/505 , H01M2004/028
Abstract: Provided is a positive electrode for a lithium secondary battery and a lithium secondary battery including the same, wherein the positive electrode is manufactured by using a pre-dispersion containing a positive electrode additive represented by Chemical Formula 1 and a conductive material having a linear structure in a positive electrode mixture layer as an irreversible additive and, by adjusting the electrode sheet resistance to satisfy a specific range, it is possible to reduce the amount of oxygen gas generated during charging and discharging, as well as easily improve the charging and discharging efficiency of the lithium secondary battery.
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