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1.发明公开公开(公告)号：US20230207799A1
公开(公告)日：2023-06-29
申请号：US18083336
申请日：2022-12-16
发明人： Chi Ho Jo , Wang Mo Jung , Tae Gu Yoo , Jin Tae Hwang , Hae Jung Jung , Jong Wook Heo , Hyeon Jin Cho
CPC分类号： H01M4/525 , H01M4/505 , H01M4/366 , C01G53/50 , H01M2004/028
摘要： A positive electrode active material is disclosed herein. In some embodiments, a positive electrode active material includes a lithium composite transition metal oxide in the form of at least one of single particles or pseudo-single particles, wherein each single particle consists of one nodule, and each pseudo-single particle is a composite of 30 or fewer nodules, wherein the lithium composite transition metal oxide includes Ni, Co, Mn, and Al, wherein a molar ratio of the number of moles of Ni to the total number of moles of all metal elements except lithium is 0.83 to less than 1, a molar ratio of the number of moles of Co to the number of moles of Mn is 0.5 to less than 1, and a molar ratio ratio of the number of moles of Co to the number of moles of Al is 5 to 15.
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公开(公告)号：US20230086038A1
公开(公告)日：2023-03-23
申请号：US17941208
申请日：2022-09-09
发明人： Jong Wook Heo , Wang Mo Jung , Chi Ho Jo , Tae Gu Yoo , Jin Tae Hwang , Hae Jung Jung , Hyeon Jin Cho
摘要： A positive electrode active material powder for a lithium secondary battery, which includes a lithium composite transition metal oxide in the form of a single particle consisting of one nodule, or a pseudo-single crystal, which is a composite of 30 or less nodules, where the positive electrode active material powder satisfies Expression 1: 0.5≤Dmean33 dpress/D50≤3.Where Dmean is an average particle diameter of the nodules as measured using an electron backscatter diffraction (EBSD) pattern analyzer, dpress is a press density measured after 5 g of the positive electrode active material powder is input into a circular mold with a diameter of 2 cm and pressurized at a pressure of 2000 kgf, and D50 is a value corresponding to a cumulative volume of 50% in the particle size distribution of the positive electrode active material powder.
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3.发明公开公开(公告)号：US20240351914A1
公开(公告)日：2024-10-24
申请号：US18688074
申请日：2022-09-08
发明人： Jin Tae Hwang , Wang Mo Jung , Chi Ho Jo , Tae Gu Yoo , Hae Jung Jung , Jong Wook Heo , Hyeon Jin Cho
CPC分类号： C01G53/50 , H01M10/0427 , C01P2002/01 , C01P2004/04 , C01P2004/61 , C01P2004/62 , C01P2004/84 , C01P2006/40
摘要： present disclosure A positive electrode active material and a method for preparing the same are provided. The method for preparing a positive electrode material present disclosure—includes the steps of mixing a transition metal precursor and a lithium raw material and primarily sintering the mixture to prepare a lithium nickel-based oxide in the form of single particles or quasi-single particles, secondarily sintering the lithium nickel-based oxide in the form of single particles or quasi-single particles, and mixing the secondarily sintered lithium nickel-based oxide and a boron raw material and then heat-treating the mixture to form a coating layer.
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公开(公告)号：US20240282928A1
公开(公告)日：2024-08-22
申请号：US18561009
申请日：2022-09-19
发明人： Hae Jung Jung , Wang Mo Jung , Chi Ho Jo , Tae Gu Yoo , Jin Tae HWANG , Jong Wook Heo , Hyeon Jin Cho
CPC分类号： H01M4/366 , H01M4/525 , H01M4/62 , H01M2004/021 , H01M2004/028
摘要： A method of preparing a positive electrode active material for a lithium secondary battery which includes:
(1) mixing a lithium composite transition metal oxide in a form of a single particle or pseudo-single particle with a cobalt-containing raw material and performing a heat treatment to form a cobalt coating layer on a surface of the lithium composite transition metal oxide; and
(2) mixing the lithium composite transition metal oxide having the cobalt coating layer formed thereon with a boron-containing raw material and performing a heat treatment to form a boron coating layer on the cobalt coating layer. A positive electrode active material for a lithium secondary battery which is prepared thereby, is also provided.-
5.发明公开公开(公告)号：US20230223526A1
公开(公告)日：2023-07-13
申请号：US18151079
申请日：2023-01-06
发明人： Jong Wook Heo , Wang Mo Jung , Chi Ho JO , Jin Tae Hwang , Hae Jung Jung , Byung Joon Chae , Tae Gu Yoo , Suk Bae Yoon , Hyeon Jin Cho
IPC分类号： H01M4/485 , H01M4/525 , H01M4/505 , H01M4/04 , H01M10/0525
CPC分类号： H01M4/485 , H01M4/525 , H01M4/505 , H01M4/0404 , H01M10/0525 , H01M2004/028
摘要： A positive electrode material powder including a lithium nickel-based oxide represented by Chemical Formula 1 (LiaNibCocM1dM2eO2) and having a degree of single-particle formation, represented by the following Equation (1), of 0.3 to 0.8:
∑
i
=
1
n
4
π
3
R
i
3
n
×
1
D
50
.
In Equation (1), Ri is a radius of the ith grain as measured by subjecting an electrode manufactured using the positive electrode material powder to ion milling and then analyzing the cross section of the electrode by electron backscatter diffraction (EBSD), n is the total number of grains as measured by the EBSD analysis and ranges from 350 to 450, and D50 is a volume-cumulative average particle diameter of the positive electrode material powder as measured using a laser diffraction particle size analyzer.-
公开(公告)号：US20230083736A1
公开(公告)日：2023-03-16
申请号：US17941284
申请日：2022-09-09
发明人： Jin Tae Hwang , Wang Mo Jung , Chi Ho Jo , Tae Gu Yoo , Hae Jung Jung , Jong Wook Heo , Hyeon Jin Cho
IPC分类号： H01M4/525 , C01G53/00 , H01M4/505 , H01M10/052
摘要： A positive electrode active material and a method for producing the same are disclosed herein. In some embodiments, a positive electrode active material includes a lithium-nickel-based oxide in the form of at least one of single particles or a pseudo-single particles, wherein each single particle consists of one nodule, wherein each pseudo-primary particles is a composite of 30 or fewer nodules, wherein on the surface of the lithium-nickel-based oxide, a number of nickel ions having an oxidation number of +3 or higher is greater than a number of nickel ions having an oxidation number less than +3.
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