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公开(公告)号：US12021228B2
公开(公告)日：2024-06-25
申请号：US17780128
申请日：2020-12-04
发明人： Gi Beom Han , Wang Mo Jung , Sang Wook Lee , Hak Yoon Kim , So Ra Baek , Jung Min Han
CPC分类号： H01M4/366 , C01G53/50 , H01M4/0471 , H01M4/505 , H01M4/525 , C01P2002/50 , C01P2004/50 , C01P2004/84 , C01P2006/40 , H01M2004/028
摘要： A method of producing a positive electrode material for a secondary battery includes preparing a lithium composite transition metal oxide containing nickel, cobalt, and manganese, forming a coating layer on a surface of the lithium composite transition metal oxide, and post-treating the lithium composite transition metal oxide having the coating layer formed thereon, wherein the post-treating is performed by exposing the lithium composite transition metal oxide having the coating layer formed thereon to moisture at a relative humidity of 10% to 50% at 25° C., and then heat treating the lithium composite transition metal oxide to remove residual moisture.
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公开(公告)号：US20220223861A1
公开(公告)日：2022-07-14
申请号：US17606929
申请日：2020-12-23
发明人： Hakyoon Kim , Gi Beom Han , Sang Wook Lee , Sora Baek , Jungmin Han , Wang Mo Jung
摘要： A positive electrode for a secondary battery in which a positive electrode mixture including a positive electrode active material is formed on at least one surface of a current collector is provided. The positive electrode includes a lithium by-product so as to satisfy the following Equation 1 based on the total weight of the positive electrode mixture. 4000 A - 2000 ≤ B ( ppm ) [ Equation 1 ] wherein in the Equation 1, A is the molar content of Ni when the total mole of transition metal contained in the positive electrode active material is 1, and B is the content of lithium by-product, when A is 0.5 or less, the minimum value of B is 6000 ppm. The positive electrode also has a harness at which cracks occur in a measuring rod of 2 pi (Ø) or more.
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公开(公告)号：US20240270603A1
公开(公告)日：2024-08-15
申请号：US18573109
申请日：2022-11-02
发明人： 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分类号： C01G53/00 , H01M4/02 , H01M4/525 , H01M10/052
CPC分类号： C01G53/50 , H01M4/525 , H01M10/052 , H01M10/4235 , C01P2006/40 , H01M2004/028
摘要： 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.
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4.发明公开公开(公告)号：US20240162437A1
公开(公告)日：2024-05-16
申请号：US18420436
申请日：2024-01-23
发明人： So Ra Baek , Eun Sol Lho , Wang Mo Jung , Sang Wook Lee , Eun Jo
IPC分类号： H01M4/525 , C01G53/00 , H01M4/505 , H01M10/0525
CPC分类号： H01M4/525 , C01G53/50 , H01M4/505 , H01M10/0525 , C01P2002/70 , C01P2004/51 , H01M2004/021
摘要： A positive electrode active material for a secondary battery which includes a nickel-based lithium composite transition metal oxide including nickel (Ni), wherein the lithium composite transition metal oxide satisfies Equation 1 and Equation 2 below
80 nm≤crystallite sizeFWHM≤150 nm [Equation 1]
Δsize(|crystallite sizeIB−crystallite sizeFWHM|)≤20 [Equation 2]
wherein, in Equation 1 and Equation 2, crystallite sizeFWHM is a crystallite size obtained by calculating from X-ray diffraction (XRD) data using a full width at half maximum (FWHM) method, and crystallite sizeIB is a crystallite size obtained by calculating from XRD data using an integral breadth (IB) method.-
5.发明公开公开(公告)号：US20240266525A1
公开(公告)日：2024-08-08
申请号：US18591579
申请日：2024-02-29
发明人： Sang Wook Lee , Gi Beom Han , Hakyoon Kim , Sora Baek , Jungmin Han , Wang Mo Jung
CPC分类号： H01M4/505 , H01M4/525 , H01M2004/021 , H01M2004/028
摘要： 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,
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%.-
6.发明公开公开(公告)号：US20240079554A1
公开(公告)日：2024-03-07
申请号：US18381475
申请日：2023-10-18
发明人： Seul Ki Kim , Tae Gon Kim , Je Young Kim , Wang Mo Jung , Jung Woo Yoo , Sang Wook Lee
IPC分类号： H01M4/133 , H01M4/1393 , H01M4/36 , H01M4/62 , H01M4/88 , H01M10/0525
CPC分类号： H01M4/133 , H01M4/1393 , H01M4/364 , H01M4/623 , H01M4/8828 , H01M10/0525 , H01M2004/021
摘要： An electrode includes an electrode active material, wherein the electrode active material layer includes an electrode active material, polyvinylidene fluoride, and a conductive agent, wherein the 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 same, and a method of preparing the electrode are also provided.
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公开(公告)号：US20230352654A1
公开(公告)日：2023-11-02
申请号：US17922839
申请日：2021-12-23
发明人： 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
CPC分类号： H01M4/364 , H01M4/525 , H01M4/505 , H01M4/485 , H01M4/0471 , H01M4/626 , H01M2004/028
摘要： 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.
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8.发明公开公开(公告)号：US20230155123A1
公开(公告)日：2023-05-18
申请号：US17780642
申请日：2020-10-20
发明人： Sang Wook Lee , Gi Beom Han , Hakyoon Kim , Sora Baek , Jungmin Han , Wang Mo Jung
CPC分类号： H01M4/505 , H01M4/525 , H01M2004/028
摘要： 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%.-
公开(公告)号：US20220416238A1
公开(公告)日：2022-12-29
申请号：US17778475
申请日：2020-12-04
发明人： So Ra Baek , Gi Beom Han , Sang Wook Lee , Hak Yoon Kim , Jung Min Han , Wang Mo Jung
摘要： 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
发明人： So Ra Baek , Wang Mo Jung , Min Suk Kang , Sang Wook Lee , Eun Sol Lho , Wen Xiu Wang
IPC分类号： H01M4/1315 , H01M4/525 , H01M4/131 , H01M4/36 , H01M4/505 , H01M4/587 , H01M4/62 , H01M10/0525 , C01G51/00 , C01G53/00 , H01M4/02
摘要： 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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