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公开(公告)号：EP4224559A1
公开(公告)日：2023-08-09
申请号：EP21911612.6
申请日：2021-12-24
发明人： KIM, Hyeong Il , KIM, Hak Yoon , BAEK, So Ra , HUR, Hyuck , KIM, Dong Hwi , CHAE, Seul Ki , JUNG, Wang Mo , LEE, Dong Hun
摘要： The present invention relates to a cathode for a lithium secondary battery, and a lithium secondary battery comprising same, the cathode comprising a cathode active material layer, which includes: a first cathode active material which is represented by chemical formula 1 and which has a grain size of 150 nm or greater; a conductive material including single-walled carbon nanotubes (SWCNTs); and a binder.
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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：EP4235862A1
公开(公告)日：2023-08-30
申请号：EP21911415.4
申请日：2021-12-17
发明人： BAEK, So Ra , KIM, Hak Yoon , HUR, Hyuck , KIM, Dong Hwi , KIM, Hyeong Il , CHAE, Seul Ki , JUNG, Wang Mo , LEE, Dong Hun
IPC分类号： H01M4/36 , H01M4/525 , H01M4/505 , H01M10/052 , H01M4/02
摘要： The present invention relates to a positive electrode active material which may improve high-temperature life characteristics and high-temperature storage characteristics of a lithium secondary battery, and a positive electrode and a lithium secondary battery which include the positive electrode active material. Specifically, the present invention relates to a bimodal positive electrode active material including a first lithium transition metal oxide and a second lithium transition metal oxide having an average particle diameter (D 50 ) smaller than that of the first lithium transition metal oxide, wherein the first lithium transition metal oxide has higher particle strength and smaller crystalline size than the second lithium transition metal oxide, and a positive electrode and a lithium secondary battery which include the positive electrode active material.
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4.发明公开
公开(公告)号：EP4203098A1
公开(公告)日：2023-06-28
申请号：EP21898364.1
申请日：2021-10-22
发明人： BAEK, So Ra , KIM, Hak Yoon , HUR, Hyuck , KIM, Dong Hwi , KIM, Hyeong Il , CHAE, Seul Ki , JUNG, Wang Mo , LEE, Dong Hun
IPC分类号： H01M4/1391 , H01M4/36 , H01M4/62 , H01M4/525 , H01M4/505 , H01M10/052 , H01M4/38 , H01M4/48
摘要： The present invention relates to a method of preparing a lithium secondary battery which includes steps (1) to (5) below.
(1) preparing a first positive electrode active material by mixing a small particle lithium composite transition metal oxide having an average particle diameter (D 50 ) of less than 7 um with a boron-containing raw material and performing a heat treatment;
(2) preparing a second positive electrode active material by mixing a large particle lithium composite transition metal oxide having an average particle diameter (D 50 ) of 8 um or more with a cobalt-containing raw material and a boron-containing raw material and performing a heat treatment;
(3) mixing the first positive electrode active material and the second positive electrode active material to prepare a positive electrode material having a bimodal particle diameter distribution;
(4) preparing a positive electrode by coating the positive electrode material on a positive electrode collector; and
(5) assembling the positive electrode, a negative electrodeincluding a silicon-based negative electrode active material, and a separator-
5.发明公开
公开(公告)号：EP4047693A1
公开(公告)日：2022-08-24
申请号：EP20895599.7
申请日：2020-12-04
发明人： BAEK, So Ra , HAN, Gi Beom , LEE, Sang Wook , KIM, Hak Yoon , HAN, Jung Min , JUNG, Wang Mo
IPC分类号： H01M4/525 , H01M4/505 , H01M10/052 , C01G53/00
摘要： The present invention relates to a positive electrode active material including 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, and a preparation method thereof.
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公开(公告)号：EP3915937A1
公开(公告)日：2021-12-01
申请号：EP20765527.5
申请日：2020-03-06
发明人： KIM, Tae Gon , JUNG, Wang Mo , YOON, Kwang Woo , SON, Seung Yong , CHAE, Byung Joon , PARK, Sin Young , SOHN, Se Hui , LEE, Dae Jin , LEE, Bo Ram , KIM, Hak Yoon , KIM, Seul Ki , HWANG, Jin Young
IPC分类号： C01B32/158 , H01M4/62 , C01B32/162 , B01J23/847
摘要： The present invention relates to a carbon nanotube having an La (100) of less than 7.0 nm when measured by XRD and a specific surface area of 100 m 2 /g to 196 m 2 /g, and an electrode and a secondary battery including the carbon nanotube.
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公开(公告)号：EP4131473A1
公开(公告)日：2023-02-08
申请号：EP22746307.2
申请日：2022-01-28
发明人： KIM, Dong Hwi , KIM, Hak Yoon , BAEK, So Ra , HUR, Hyuck , KIM, Hyeong Il , CHAE, Seul Ki , JUNG, Wang Mo , LEE, Dong Hun
摘要： The present invention relates to a positive electrode for a lithium secondary, the positive electrode having improved capacity, efficiency, lifespan, output properties, and thermal stability, and including a positive electrode current collector, and 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 a single particle, and the second positive electrode active material layer includes small-diameter particles in the form of a secondary particle.
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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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公开(公告)号：EP4273955A1
公开(公告)日：2023-11-08
申请号：EP22760125.9
申请日：2022-02-25
发明人： LEE, Dong Hun , KIM, Hak Yoon , BAEK, So Ra , HUR, Hyuck , KIM, Dong Hwi , KIM, Hyeong Il , CHAE, Seul Ki , JUNG, Wang Mo
IPC分类号： H01M4/131 , H01M4/525 , H01M4/505 , H01M10/052 , H01M4/02
摘要： The present invention relates to a positive electrode for a lithium secondary battery, wherein the positive electrode of the present invention includes a positive electrode collector, a first positive electrode active material layer which is formed on the positive electrode collector and includes a first positive electrode active material, and a second positive electrode active material layer which is formed on the first positive electrode active material layer and includes a second positive electrode active material, wherein the first positive electrode active material and the second positive electrode active material include a lithium nickel-cobalt-based oxide in which an amount of nickel among total metallic components excluding lithium is 80 atm% or more, the first positive electrode active material has a molar ratio of nickel to cobalt of 18 or more, and the second positive electrode active material has a molar ratio of nickel to cobalt of less than 18.
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公开(公告)号：EP4254554A1
公开(公告)日：2023-10-04
申请号：EP22760078.0
申请日：2022-02-24
发明人： LEE, Dong Hun , KIM, Hak Yoon , BAEK, So Ra , HUR, Hyuck , KIM, Dong Hwi , KIM, Hyeong Il , CHAE, Seul Ki , JUNG, Wang Mo
IPC分类号： H01M4/36 , H01M4/525 , H01M4/505 , H01M10/052 , H01M4/02
摘要： The present invention relates to a cathode active material and a preparation method therefor, wherein the average crystallite size of a core part is formed to be smaller than that of a shell part in a high-nickel cathode active material, and thus the cathode active material is developed to be able to suppress microcrack occurrence and electrolyte decomposition during charging and discharging.
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