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公开(公告)号：US20230327099A1
公开(公告)日：2023-10-12
申请号：US18299643
申请日：2023-04-12
发明人： Young Hoon DO , Byoung Beom LIM , Jeong Hoon JEUN , Yong Hyun CHO
IPC分类号： H01M4/505 , H01M4/131 , H01M10/058 , H01M4/525 , H01M10/44
CPC分类号： H01M4/505 , H01M4/131 , H01M10/058 , H01M4/525 , H01M10/446 , H01M2004/021
摘要： A cathode for a lithium secondary battery according to an embodiment of the present invention includes a cathode current collector, and a cathode active material layer on the cathode current collector. The cathode active material layer includes cathode active material particles. The cathode active material particles include first lithium metal oxide particles having a shape of a secondary particle in which a plurality of primary particles are aggregated, and second lithium metal oxide particles having a shape of a single particle. A closed pore ratio of the cathode active material layer is 5% or less.
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公开(公告)号：US20240072298A1
公开(公告)日：2024-02-29
申请号：US18479926
申请日：2023-10-03
发明人： Young Hoon DO , Yoon Ji LEE , Yong Hyun CHO , In Haeng CHO
IPC分类号： H01M10/0525 , H01M4/36 , H01M4/505 , H01M4/525 , H01M10/0567 , H01M10/0569 , H01M50/46
CPC分类号： H01M10/0525 , H01M4/364 , H01M4/505 , H01M4/525 , H01M10/0567 , H01M10/0569 , H01M50/46 , H01M2004/027
摘要： Provided is a lithium secondary battery, and the lithium secondary battery of the present invention includes: a positive electrode including a first lithium-metal oxide including secondary particles formed by aggregating primary particles having a particle diameter of 2 μm or less and a second lithium-metal oxide including nickel and at least one or more metals selected from the group consisting of manganese (Mn) and cobalt (Co) and including particles having a primary particle diameter of 2 μm or more; a negative electrode; a separator interposed between the positive electrode and the negative electrode; and an electrolyte, wherein the electrolyte includes a lithium salt, a nonaqueous organic solvent, and a difluorophosphite compound containing at least one or more difluorophosphite groups.
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公开(公告)号：US20210066743A1
公开(公告)日：2021-03-04
申请号：US17003635
申请日：2020-08-26
发明人： Young Hoon DO , Yoon Ji LEE , Yong Hyun CHO , In Haeng CHO
IPC分类号： H01M10/0525 , H01M4/525 , H01M2/16 , H01M4/505 , H01M10/0569 , H01M10/0567
摘要： Provided is a lithium secondary battery, and the lithium secondary battery of the present invention includes: a positive electrode including a first lithium-metal oxide including secondary particles formed by aggregating primary particles having a particle diameter of 2 μm or less and a second lithium-metal oxide including nickel and at least one or more metals selected from the group consisting of manganese (Mn) and cobalt (Co) and including particles having a primary particle diameter of 2 μm or more; a negative electrode; a separator interposed between the positive electrode and the negative electrode; and an electrolyte, wherein the electrolyte includes a lithium salt, a nonaqueous organic solvent, and a difluorophosphite compound containing at least one or more difluorophosphite groups.
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公开(公告)号：US20190393479A1
公开(公告)日：2019-12-26
申请号：US16447522
申请日：2019-06-20
发明人： Soo Ho KIM , Min Gu KANG , Young Hoon DO , Yong Hyun CHO
IPC分类号： H01M4/131 , H01M10/0525 , H01M10/42 , H01M4/505 , H01M4/525 , H01M4/62 , H01M4/66 , H01M4/485 , H01M4/36
摘要： A lithium secondary battery includes a cathode formed from a cathode active material including a first cathode active material particle and a second cathode active material particle, an anode and a separation layer interposed between the cathode and the anode. The first cathode active material particle includes a lithium metal oxide including a concentration gradient and has a secondary particle structure formed from an assembly of primary particles. The second cathode active material particle includes a lithium metal oxide having a single particle structure. The first and second cathode active material particles each includes at least two metals except from lithium, and an amount of nickel is the largest among those of the metals in each of the first and second cathode active material particles.
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公开(公告)号：US20190221830A1
公开(公告)日：2019-07-18
申请号：US16251446
申请日：2019-01-18
发明人： Young Hoon DO , Yong Hyun CHO , Min Gu KANG , Soo Ho KIM
IPC分类号： H01M4/131 , H01M4/525 , H01M4/505 , H01M10/0525 , H01M4/485
CPC分类号： H01M4/131 , H01M4/485 , H01M4/505 , H01M4/525 , H01M10/0525 , H01M2004/021 , H01M2004/028
摘要： A lithium secondary battery comprises a cathode active material including a first cathode active material particle having a concentration gradient region and a second cathode active material particle having a single particle structure, to obtain improved electrical performance and mechanical stability.
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公开(公告)号：US20220149352A1
公开(公告)日：2022-05-12
申请号：US17582986
申请日：2022-01-24
发明人： Soo Ho KIM , Min Gu KANG , Young Hoon DO , Yong Hyun CHO
摘要： A cathode active material includes a first cathode active material particle and a second cathode active material particle. The first cathode active material particle includes a lithium metal oxide including a concentration gradient and has a secondary particle structure formed from an assembly of primary particles. The second cathode active material particle includes a lithium metal oxide having a single particle structure. The first and second cathode active material particles each includes at least two metals except from lithium, and an amount of nickel is the largest among those of the metals in each of the first and second cathode active material particles.
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公开(公告)号：US20220093905A1
公开(公告)日：2022-03-24
申请号：US17540052
申请日：2021-12-01
发明人： Min Gu KANG , Soo Ho KIM , Young Hoon DO , Yong Hyun CHO
IPC分类号： H01M4/131 , H01M4/36 , H01M4/485 , H01M4/505 , H01M4/525 , H01M4/62 , H01M4/66 , H01M10/0525 , H01M10/42 , H01M50/449
摘要： A lithium secondary battery includes a cathode formed from a cathode active material including a first cathode active material particle and a second cathode active material particle, an anode and a separation layer interposed between the cathode and the anode. The first cathode active material particle includes a lithium metal oxide in which at least one metal forms a concentration gradient. The second cathode active material particle includes primary particles having different shapes or crystalline structures from each other.
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公开(公告)号：US20200014022A1
公开(公告)日：2020-01-09
申请号：US16505087
申请日：2019-07-08
发明人： Min Gu KANG , Soo Ho KIM , Young Hoon DO , Yong Hyun CHO
IPC分类号： H01M4/131 , H01M10/0525 , H01M10/42 , H01M2/16 , H01M4/36 , H01M4/485 , H01M4/505 , H01M4/525 , H01M4/62 , H01M4/66
摘要： A lithium secondary battery includes a cathode formed from a cathode active material including a first cathode active material particle and a second cathode active material particle, an anode and a separation layer interposed between the cathode and the anode. The first cathode active material particle includes a lithium metal oxide in which at least one metal forms a concentration gradient. The second cathode active material particle includes primary particles having different shapes or crystalline structures from each other.
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公开(公告)号：US20190221829A1
公开(公告)日：2019-07-18
申请号：US16247732
申请日：2019-01-15
发明人： Soo Ho KIM , Min Gu KANG , Young Hoon DO , Yong Hyun CHO
IPC分类号： H01M4/131 , H01M10/0525 , H01M4/36 , H01M4/525 , H01M4/505
CPC分类号： H01M4/131 , H01M4/364 , H01M4/505 , H01M4/525 , H01M10/0525
摘要： A lithium secondary battery comprises a cathode, an anode, a separator and a nonaqueous electrolyte solution. The cathode includes a first cathode active material in which at least one of metals included in the first cathode material has a concentration gradient region between a central portion and a surface portion, and a second cathode active material having a single particle structure. The lithium secondary battery has improved life-span and penetration stability.
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