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1.发明公开
公开(公告)号：EP4336588A1
公开(公告)日：2024-03-13
申请号：EP22856270.8
申请日：2022-08-12
申请人： LG Chem, Ltd.
发明人： SON, Min Hee , LEE, Hyuck , MOK, Duck Gyun
摘要： The present invention can minimize deterioration, occurring in a washing process, on the surface of a positive electrode active material and effectively control residual lithium, and relates to a method for producing a positive electrode active material process is within to the present invention includes the steps of: (A) preparing a lithium transition metal oxide; and (B) mixing the lithium transition metal oxide and a washing solution, washing the mixture, and then drying the mixture, wherein the washing solution contains a phosphorus-based compound and is a basic solution, and the phosphorus-based compound is contained in the washing solution such that the amount of phosphorus is 100-1,000 ppm in weight based on the lithium transition metal oxide, and to a positive electrode active material produced by the method.
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公开(公告)号：EP3331070B1
公开(公告)日：2019-05-15
申请号：EP17775886.9
申请日：2017-03-31
申请人： LG Chem, Ltd.
发明人： KIM, Jong Pil , CHO, Seung Beom , KIM, Won Tae , SON, San Su , LEE, Hyuck
IPC分类号： H01M4/525 , H01M4/505 , H01M4/131 , H01M10/0525 , C01G53/00
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公开(公告)号：EP4246627A1
公开(公告)日：2023-09-20
申请号：EP22750019.6
申请日：2022-02-03
申请人： Lg Chem, Ltd.
发明人： JUNG, Ji Hun , LEE, Hyuck , JUNG, Won Sig , MOK, Duck Gyun
IPC分类号： H01M4/525 , H01M4/505 , C01G53/00 , H01M10/052 , H01M4/02
摘要： The present invention relates to a positive electrode active material including a lithium transition metal oxide which contains 60 mol% or more of nickel based on a total number of moles of transition metals excluding lithium and is in a form of a secondary particle in which primary particles are aggregated, wherein the lithium transition metal oxide satisfies Equation 1 in the specification, a method of preparing the positive electrode active material, and a positive electrode and a lithium secondary battery which include the positive electrode active material.
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公开(公告)号：EP4119503A1
公开(公告)日：2023-01-18
申请号：EP21878006.2
申请日：2021-10-06
申请人： Lg Chem, Ltd.
发明人： LEE, Hyuck , MOK, Duck-Gyun , SON, Min-Hee
摘要： Disclosed is a method for manufacturing a mixture of positive electrode active material particles of nickel-rich lithium composite transition metal oxide, comprising the steps of: (S1) washing first positive electrode active material particles having a predetermined average particle size and consisting of a positive electrode active material of lithium composite transition metal oxide having the nickel content of 80 mol% or more in the total transition metal; (S2) washing second positive electrode active material particles having a predetermined average particle size and consisting of a positive electrode active material of lithium composite transition metal oxide having the nickel content of 80 mol% or more in the total transition metal, wherein the predetermined average particle size of the second positive electrode active material particles is different from the average particle size of the first positive electrode active material particles; (S3) mixing the first positive electrode active material particles and the second positive electrode active material particles respectively washed from the (S1) and the (S2) to manufacture a mixture of positive electrode active material particles; and (S4) filtering and drying the mixture of positive electrode active material particles.
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公开(公告)号：EP4089053A1
公开(公告)日：2022-11-16
申请号：EP21788135.8
申请日：2021-04-15
申请人： Lg Chem, Ltd.
发明人： SON, Min Hee , LEE, Hyuck , MOK, Duck Gyun , KWAK, No Woo , AHN, Dong Joon
摘要： The present invention is an invention capable of reducing the usage amount of a rinsing solution, minimizing the surface degradation of a positive electrode active material, which occurs during a rinsing process, and effectively controlling residual lithium, and provides a method of preparing a positive electrode active material, which includes steps of: (A) preparing a lithium transition metal oxide; and (B) mixing the lithium transition metal oxide and a rinsing solution and performing rinsing and drying, wherein the rinsing solution includes one or more additives selected from among LiOH, NaOH, and KOH, the additive is included in an amount of 3,000 ppm to 18,000 ppm relative to the lithium transition metal oxide in the rinsing solution, and the rinsing solution has a pH of 12 or more.
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公开(公告)号：EP3944372A1
公开(公告)日：2022-01-26
申请号：EP20894830.7
申请日：2020-11-27
申请人： LG CHEM, LTD.
发明人： KWAK, No Woo , LEE, Hyuck , MOK, Duck Gyun , SON, Min Hee
摘要： The present invention relates to a positive electrode active material containing a lithium transition metal oxide in the form of a secondary particle in which primary particles are aggregated, wherein a zirconium-containing coating film is formed on the surface of the lithium transition metal oxide secondary particle and at the interface between the primary particles present inside the secondary particle, and a production method thereof.
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公开(公告)号：EP3388394A1
公开(公告)日：2018-10-17
申请号：EP17824508.0
申请日：2017-07-04
申请人： LG Chem, Ltd.
发明人： LEE, Hyuck , CHO, Seung Beom , SON, San Su , JU, Jin Wook , CHOI, Sang Soon , KIM, Jong Pil
IPC分类号： C01G53/00 , H01M4/525 , H01M4/131 , H01M10/0525
摘要： Provided are a method of preparing a positive electrode active material for a secondary battery, in which the positive electrode active material is uniformly doped with various doping elements without worrying about surface damage of the active material and characteristics degradation by including mixing a metal precursor for a positive electrode active material and a raw material including a doping element, in which an average particle diameter ratio is in a range of 5:1 to 2,000:1, using acoustic resonance to prepare a precursor doped with the doping element, and mixing the doped precursor with a lithium raw material and performing a heat treatment, and a positive electrode active material which has improved structure stability by being prepared by the above method and may improve battery characteristics, for example, capacity reduction may be minimized and cycle characteristics may be improved when used in the battery.
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公开(公告)号：EP4421906A1
公开(公告)日：2024-08-28
申请号：EP22901870.0
申请日：2022-12-02
申请人： LG Chem, Ltd.
发明人： MOK, Duck Gyun , LEE, Hyuck , SON, Min Hee
摘要： The present invention relates to a method for producing a positive electrode active material which can minimize the surface degradation of a positive electrode active material which occurs in a washing process, effectively control residual lithium, and form a uniform coating layer on the surface of the positive electrode active material, and a positive electrode active material produced by the method, the method including the steps of: (A) preparing a lithium transition metal oxide; (B) mixing the lithium transition metal oxide and a first washing solution to first wash and then first filter the lithium transition metal oxide; (C) simultaneously second washing and second filtering the lithium transition metal oxide through step (B) using a filter device capable of washing and filtering simultaneously with a second washing solution; and (D) drying the lithium transition metal oxide through step (C), then mixing a coating element-containing raw material with the dried lithium transition metal oxide and heat-treating the mixture to form a coating layer, wherein the coating element-containing raw material includes a boron-containing raw material and at least one lithium-containing raw material selected from among LiOH, Li2CO3, and Li20.
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9.发明公开
公开(公告)号：EP3955344A1
公开(公告)日：2022-02-16
申请号：EP21770478.2
申请日：2021-03-22
申请人： LG CHEM, LTD.
发明人： KWAK, No Woo , LEE, Hyuck , MOK, Duck Gyun , SON, Min Hee
IPC分类号： H01M4/36 , H01M4/525 , H01M4/505 , H01M4/62 , H01M10/052
摘要： Provided is a positive electrode active material for a secondary battery which includes a composite coating layer formed on a surface of lithium composite transition metal oxide particles, wherein the composite coating layer includes a ferroelectric material and a boron-based oxide containing boron.
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公开(公告)号：EP4296237A1
公开(公告)日：2023-12-27
申请号：EP22776134.3
申请日：2022-03-25
申请人： LG CHEM, LTD.
发明人： MOK, Duck Gyun , LEE, Hyuck , KWAK, No Woo , SON, Min Hee
摘要： The present invention is an invention capable of reducing the amount of a water-washing solution used, minimizing surface deterioration of a positive electrode active material generated in a water-washing process, and effectively controlling residual lithium, and relates to a method of preparing a positive electrode active material, the method including: (A) preparing a lithium transition metal oxide; (B) mixing the lithium transition metal oxide with a first water-washing solution to perform a first water-washing and then a first filtering on the lithium transition metal oxide; and (C) using a filtering device capable of concurrently water-washing and filtering the lithium transition metal oxide subjected to step (B) to concurrently perform a second water-washing and a second filtering, with a second water-washing solution, wherein the second water-washing solution is in an amount of 10 parts by weight to 50 parts by weight with respect to 100 parts by weight of the first water-washing solution.
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