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公开(公告)号：EP4462502A2
公开(公告)日：2024-11-13
申请号：EP24202476.8
申请日：2019-01-23
发明人： BAEK, So Ra , KANG, Min Suk , LEE, Sang Wook , JUNG, Wang Mo , LEE, Dong Hun , JEON, Hye Lim , LHO, Eun Sol
IPC分类号： H01M4/1391
摘要： The present invention relates to a positive electrode active material for a secondary battery which includes a lithium composite transition metal oxide including Ni, Co, and Mn, wherein the lithium composite transition metal oxide is in the form of a secondary particle, and a coating layer formed on surfaces of particles of the lithium composite transition metal oxide, wherein, in the lithium composite transition metal oxide, an amount of the Ni in a total amount of transition metals is 60 mol% or more, and an amount of the Mn is greater than an amount of the Co, and the coating layer includes a compound represented by Formula 1.
[Formula 1] Li a M 1 b O c
wherein in Formula 1, M 1 comprises Al and at least one selected from the group consisting of B, Si, Ti, and P, and 1≤a≤4, 1≤b≤8, and 1≤c≤20.-
公开(公告)号：EP4040537A1
公开(公告)日：2022-08-10
申请号：EP20896334.8
申请日：2020-12-03
发明人： HAN, Jung Min , HAN, Gi Beom , LEE, Sang Wook , KIM, Hak Yoon , BAEK, So Ra , JUNG, Wang Mo
摘要： A method of preparing a positive electrode active material includes preparing a lithium transition metal oxide containing nickel in an amount of 60 mol% or more based on a total number of moles of metals excluding lithium, impregnating the lithium transition metal oxide with 300 ppm to 1,000 ppm of moisture based on 100 parts by weight of the lithium transition metal oxide, and performing a heat treatment on the lithium transition metal oxide impregnated with the moisture, wherein a lithium by-product present on a surface of the lithium transition metal oxide and the moisture react to form a passivation layer on the surface of the lithium transition metal oxide. A positive electrode active material prepared by the above-described preparation method, and a positive electrode and a lithium secondary battery which include the positive electrode active material are also provided.
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3.发明公开
公开(公告)号：EP3916849A1
公开(公告)日：2021-12-01
申请号：EP20911015.4
申请日：2020-12-23
发明人： KIM, Hakyoon , HAN, Gi Beom , LEE, Sang Wook , BAEK, Sora , HAN, Jungmin , JUNG, Wang Mo
IPC分类号： H01M4/131 , H01M4/525 , H01M4/505 , H01M4/1391 , H01M4/04 , H01M10/052 , H01M4/02
摘要： The present disclosure provides 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,
wherein 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, and
wherein the positive electrode has a harness at which cracks occur in a measuring rod of 2 pi (Ø) or more, during a flexibility test a harness at which cracks occur in a measuring rod of 2 pi (Ø) or more, during a flexibility test in which the electrode is bent in half to contact the measuring rod for each pi, and then both ends of the positive electrode are lifted: 4000 A − 2000 ≤ B ppm
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 the A is 0.5 or less, the minimum value of B is 6000 ppm.-
公开(公告)号：EP4129927A1
公开(公告)日：2023-02-08
申请号：EP21911586.2
申请日：2021-12-23
发明人： LEE, Dae Jin , PARK, Sang Min , KWAK, Min , JUNG, Wang Mo , HAN, Gi Beom , LEE, Sang Wook , LHO, Eun Sol , DO, Joong Yeop , PARK, Kang Joon
摘要： The present invention relates to a method of preparing a positive electrode active material which may ensure surface uniformity and coating uniformity of first and second lithium transition metal oxides included in the positive electrode active material and may improve productivity, wherein the present invention relates to a method of preparing a positive electrode active material which includes a step of (A) mixing 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 to prepare a mixture and washing the mixture with a washing solution, wherein an amount (parts by weight) of the washing solution based on 100 parts by weight of the mixture satisfies Equation 1 described in the present specification.
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公开(公告)号：EP4047685A1
公开(公告)日：2022-08-24
申请号：EP20895917.1
申请日：2020-12-04
发明人： HAN, Gi Beom , JUNG, Wang Mo , LEE, Sang Wook , KIM, Hak Yoon , BAEK, So Ra , HAN, Jung Min
摘要： The present invention relates to a method of producing a positive electrode material for a secondary battery, the method including 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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6.发明公开
公开(公告)号：EP4047679A1
公开(公告)日：2022-08-24
申请号：EP20901464.6
申请日：2020-10-20
发明人： LEE, Sang Wook , HAN, Gi Beom , KIM, Hakyoon , BAEK, Sora , HAN, Jungmin , JUNG, Wang Mo
IPC分类号： H01M4/1315 , H01M4/525 , H01M4/505 , H01M10/052 , H01M4/02
摘要： The present disclosure provides a positive electrode in which a positive electrode mixture containing a positive electrode active material is formed on a positive electrode current collector, wherein the positive electrode active material includes a lithium transition metal oxide powder represented by the following chemical formula 1,
Li a Ni x Co y M z O 2-w A w (1)
wherein, 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,
wherein the lithium transition metal oxide powder is composed of: large particles in which secondary particles are formed by aggregating primary particles, and an average particle diameter (D50) of the secondary particles is 7 µ m to 17 µ m, and small particles in which single particles are formed and having average particle diameter (D50) of 2 µ m to 7 µ m, wherein a mixing ratio of the large particles and the small particles is 5:5 to 9:1 based on the weight, and wherein the positive electrode mixture has a porosity of 22% to 35%.-
公开(公告)号：EP3916859A1
公开(公告)日：2021-12-01
申请号：EP20893411.7
申请日：2020-09-22
发明人： HAN, Jungmin , HAN, Gi Beom , LEE, Sang Wook , KIM, Hakyoon , BAEK, Sora , JUNG, Wang Mo
IPC分类号： H01M4/525 , H01M4/505 , H01M10/052
摘要： The present disclosure provides a positive electrode active material for a secondary battery, comprising: a lithium nickel-based oxide doped with a doping element (M'),
wherein the doping element (M') is at least one selected from the group consisting of titanium (Ti) and magnesium (Mg),
wherein when the doping element (M') is Ti, the doping content is 3000 ppm to 5000 ppm based on the total amount of the lithium nickel-based oxide excluding the doping element,
wherein when the doping element (M') is Mg, the doping content is 500 ppm to 5000 ppm based on the total amount of the lithium nickel-based oxide excluding the doping element, and
wherein when the doping element (M') is Ti and Mg, the total doping content is 3500 ppm to 5000 ppm based on the total amount of the lithium nickel oxide excluding the doping elements.-
公开(公告)号：EP4411876A1
公开(公告)日：2024-08-07
申请号：EP22890374.6
申请日：2022-11-02
发明人： HAN, Gi Beom , KIM, Jong Woo , LEE, Sang Wook , KIM, Hak Yoon , BAEK, So Ra , LHO, Eun Sol , HAN, Jung Min , JUNG, Hae Jung , JUNG, Wang Mo , LEE, Young Hwan , CHUNG, Dae Sik , PARK, Su Han
摘要： The present invention relates to a positive electrode material including a positive electrode active material comprising a lithium nickel-based oxide having a mole fraction of nickel of 50 mol% to 90 mol% among metallic elements excluding lithium; and a coating layer including boron (B), which is formed on the surface of the lithium nickel-based oxide, wherein the positive electrode material has a BET specific surface area of 0.2 m2/g to 0.4 m2/g, and the boron (B) is included in an amount of 500 ppm to 1,000 ppm based on the total weight of the positive electrode material.
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公开(公告)号：EP4342851A1
公开(公告)日：2024-03-27
申请号：EP22898883.8
申请日：2022-11-02
发明人： LHO, Eun Sol , HAN, Gi Beom , KIM, Jong Woo , JUNG, Wang Mo , PARK, Sang Min , LEE, Sang Wook , KIM, Seul Ki , KIM, Hyeong Il
IPC分类号： C01G53/00 , H01M4/525 , H01M4/505 , H01M10/052
摘要： The present invention relates to a method for preparing a positive electrode active material for a lithium secondary battery, and a positive electrode active material prepared thereby. The preparation method comprises: a first step of preparing lithium transition metal oxide by mixing and sintering a transition metal precursor, comprising 70 mole% or greater of nickel relative to the total number of moles of transition metal, and a lithium raw material; and a second step of washing the lithium transition metal oxide with hot water at higher than 90°C. An EELS analysis result with respect to the particle surface of the lithium transition metal oxide after the second step satisfies formula 1.
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公开(公告)号：EP4235860A1
公开(公告)日：2023-08-30
申请号：EP21898754.3
申请日：2021-11-30
发明人： LEE, Sang Wook , LEE, Dae Jin , PARK, Sang Min , KWAK, Min , JUNG, Wang Mo , HAN, Gi Beom , LHO, Eun Sol , DO, Joong Yeop , PARK, Kang Joon
IPC分类号： H01M4/36 , H01M4/525 , H01M4/505 , H01M10/052
摘要： The present invention relates to a cathode active material, and a cathode and a lithium secondary battery, comprising same, the cathode active material capable of realizing a battery having a low disorder of nickel in a crystal structure and high particle strength, and excellent capacity characteristics and capacity retention, and to a cathode active material, and a cathode and a lithium secondary battery, comprising same, the cathode active material comprising: large-particle-diameter lithium transition metal oxide; and small-particle-diameter lithium transition metal oxide having an average particle diameter (D 5o ) smaller than the large-particle-diameter lithium transition metal oxide, wherein the large-particle-diameter lithium transition metal oxide and the small-particle-diameter lithium transition metal oxide each independently have a composition represented by Formula 1 described in the specification and have a crystal grain size of 100-150 nm, a grain size difference between the large-particle-diameter lithium transition metal oxide and the small-particle-diameter lithium transition metal oxide is less than 40 nm, and the Ni-disorder is 1.5% or less.
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