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公开(公告)号:US20230155127A1
公开(公告)日:2023-05-18
申请号:US17922833
申请日:2022-01-28
Applicant: LG Energy Solution, Ltd.
Inventor: Dong Hwi Kim , Hak Yoon Kim , So Ra Baek , Hyuck Hur , Hyeong Il Kim , Seul Ki Chae , Wang Mo Jung , Dong Hun Lee
IPC: H01M4/525 , H01M10/052
CPC classification number: H01M4/525 , H01M10/052 , H01M2004/028
Abstract: A positive electrode and a lithium secondary including the same is disclosed herein. In some embodiments, the positive electrode includes a positive electrode current collector, a first positive electrode active material layer and a second positive electrode active material layer sequentially stacked on the positive electrode current collector, wherein the first positive electrode active material layer and the second positive electrode active material layer include a bimodal positive active material, the first positive electrode active material layer includes small-diameter particles in the form of single particles, and the second positive electrode active material layer includes small-diameter particles in the form of secondary particles. The positive electrode has improved capacity, efficiency, lifespan, output properties, and thermal stability.
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82.
公开(公告)号:US20230155123A1
公开(公告)日:2023-05-18
申请号:US17780642
申请日:2020-10-20
Applicant: LG Energy Solution, Ltd.
Inventor: Sang Wook Lee , Gi Beom Han , Hakyoon Kim , Sora Baek , Jungmin Han , Wang Mo Jung
CPC classification number: H01M4/505 , H01M4/525 , H01M2004/028
Abstract: A positive electrode and a secondary battery including the same is disclosed herein. In some embodiments, a positive electrode includes a positive electrode current collector and a positive electrode mixture containing a positive electrode active material disposed thereon, the positive electrode active material includes a lithium transition metal oxide powder represented by chemical formula 1,
LiaNixCoyMzO2-wAw (1)
M is at least one selected from the group consisting of Mn, Ti, Mg, Al, Zr, Mn and Ni, A is an oxygen-substituted halogen, and 1.00≤a≤1.05, 0.1≤x≤0.8, 0.1≤y≤0.8, 0.01≤z≤0.4, and 0≤w≤0.001,
the powder having large particles which are secondary particles having an average particle diameter (D50) of 7 μm to 17 μm, and small particles which are single particles having average particle diameter (D50) of 2 μm to 7 μm, weight ratio of large particles to small particles is 5:5 to 9:1, and the positive electrode mixture has a porosity of 22% to 35%.-
83.
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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84.
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:US20220416238A1
公开(公告)日:2022-12-29
申请号:US17778475
申请日:2020-12-04
Applicant: LG Energy Solution, Ltd.
Inventor: So Ra Baek , Gi Beom Han , Sang Wook Lee , Hak Yoon Kim , Jung Min Han , Wang Mo Jung
Abstract: A positive electrode active material includes a lithium transition metal oxide, which is in the form of a secondary particle formed by aggregation of primary particles and is represented by Formula 1, wherein the lithium transition metal oxide has a crystalline size of 160 nm or less and an average particle diameter of the primary particle of 0.6 μm or more. A preparation method thereof is also provided.
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公开(公告)号:US11532807B2
公开(公告)日:2022-12-20
申请号:US16611542
申请日:2018-11-06
Applicant: LG Energy Solution, Ltd.
Inventor: So Ra Baek , Wang Mo Jung , Min Suk Kang , Sang Wook Lee , Eun Sol Lho , Wen Xiu Wang
IPC: H01M4/1315 , H01M4/525 , H01M4/131 , H01M4/36 , H01M4/505 , H01M4/587 , H01M4/62 , H01M10/0525 , C01G51/00 , C01G53/00 , H01M4/02
Abstract: A spinel-structured lithium manganese-based positive electrode active material includes a lithium manganese oxide represented by Formula 1, and a coating layer which is disposed on a surface of the lithium manganese oxide and includes at least one coating element selected from the group consisting of aluminum, titanium, tungsten, boron, fluorine, phosphorus, magnesium, nickel, cobalt, iron, chromium, vanadium, copper, calcium, zinc, zirconium, niobium, molybdenum, strontium, antimony, bismuth, silicon, and sulfur, and a positive electrode and a lithium secondary battery which include the positive electrode active material, Li1+aMn2−bM1bO4−cAc [Formula 1] wherein, in Formula 1, M1 is at least one metallic element including lithium (Li), A is at least one element selected from the group consisting of fluorine, chlorine, bromine, iodine, astatine, and sulfur, 0≤a≤0.2, 0
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88.
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.
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公开(公告)号:US20220158194A1
公开(公告)日:2022-05-19
申请号:US17442876
申请日:2020-03-27
Applicant: LG Energy Solution, Ltd.
Inventor: Tae Gon Kim , Wang Mo Jung , Houng Sik Yoo , Bo Ram Lee , Dong Hyun Kim , Hak Yoon Kim
IPC: H01M4/62 , H01M10/052 , H01M4/02
Abstract: The present invention relates to an electrode and a secondary battery including the same, the electrode including an electrode active material layer, wherein: the electrode active material layer includes an electrode active material, a hydrogenated nitrile butadiene rubber, and a conductive agent; the conductive agent includes a carbon nanotube structure in which 2 to 5,000 single-walled carbon nanotube units are bonded; and the carbon nanotube structure is included in the electrode active material layer in an amount of 0.01-0.5 wt %.
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公开(公告)号:US11258056B2
公开(公告)日:2022-02-22
申请号:US16611126
申请日:2018-11-06
Applicant: LG Energy Solution, Ltd.
Inventor: So Ra Baek , Wang Mo Jung , Min Suk Kang , Sang Wook Lee , Eun Sol Lho , Wen Xiu Wang
IPC: H01M4/1315 , H01M4/525 , H01M10/0525 , C01G51/00 , H01M4/131 , H01M4/36 , H01M4/505 , C01G53/00 , H01M4/587 , H01M4/62 , H01M4/02
Abstract: The present disclosure relates to a positive electrode material including a spinel-structured lithium manganese-based first positive electrode active material and a lithium nickel-manganese-cobalt-based second positive electrode active material, wherein the first positive electrode active material includes a lithium manganese oxide represented by Formula 1 and a coating layer which is disposed on a surface of the lithium manganese oxide, the second positive electrode active material is represented by Formula 2, and an average particle diameter of the second positive electrode active material is greater than an average particle diameter of the first positive electrode active material, and a positive electrode and a lithium secondary battery which include the positive electrode material: Li1+aMn2−bM1bO4−cAc [Formula 1] Li1+x[NiyCozMnwM2v]O2−pBp [Formula 2]
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