-
公开(公告)号：US12132199B2
公开(公告)日：2024-10-29
申请号：US18207211
申请日：2023-06-08
发明人： Byung Chun Park , Hong Kyu Park , Wang Mo Jung , Seong Hoon Kang
IPC分类号： H01M4/36 , C01G53/00 , H01M4/505 , H01M4/525 , H01M10/052 , H01M10/0525 , H01M4/02
CPC分类号： H01M4/366 , C01G53/42 , C01G53/50 , H01M4/505 , H01M4/525 , H01M10/052 , H01M10/0525 , C01P2004/61 , C01P2004/84 , C01P2004/88 , H01M2004/021 , H01M2004/028
摘要： A positive electrode active material includes a core including a first lithium complex metal oxide, and a shell located surrounding the core and including a second lithium complex metal oxide, and further includes a buffer layer located between the core and the shell. The buffer layer includes a pore, and a three-dimensional network structure of a third lithium complex metal oxide which is connecting the core and the shell. Accordingly, the positive electrode active material is capable of enhancing an output property and a life property by minimizing destruction of the active material caused by a rolling process during the electrode preparation, maximizing reactivity with an electrolyte liquid, and by the particles that form the shell having a crystal structure with orientation facilitating lithium ion intercalation and deintercalation.
-
公开(公告)号：US12126020B2
公开(公告)日：2024-10-22
申请号：US17922833
申请日：2022-01-28
发明人： Dong Hwi Kim , Hak Yoon Kim , So Ra Baek , Hyuck Hur , Hyeong Il Kim , Seul Ki Chae , Wang Mo Jung , Dong Hun Lee
IPC分类号： H01M4/525 , H01M4/02 , H01M10/052
CPC分类号： H01M4/525 , H01M10/052 , H01M2004/021 , H01M2004/028
摘要： A positive electrode and a lithium secondary including the same is disclosed herein. In some embodiments, the positive electrode includes a positive electrode current collector, 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 single particles, and the second positive electrode active material layer includes small-diameter particles in the form of secondary particles. The positive electrode has improved capacity, efficiency, lifespan, output properties, and thermal stability.
-
公开(公告)号：US12021228B2
公开(公告)日：2024-06-25
申请号：US17780128
申请日：2020-12-04
发明人： Gi Beom Han , Wang Mo Jung , Sang Wook Lee , Hak Yoon Kim , So Ra Baek , Jung Min Han
CPC分类号： H01M4/366 , C01G53/50 , H01M4/0471 , H01M4/505 , H01M4/525 , C01P2002/50 , C01P2004/50 , C01P2004/84 , C01P2006/40 , H01M2004/028
摘要： A method of producing a positive electrode material for a secondary battery includes 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.
-
公开(公告)号：US11993846B2
公开(公告)日：2024-05-28
申请号：US17781925
申请日：2021-01-12
发明人： Seul Ki Chae , Dae Jin Lee , Dong Hwi Kim , Jin Tae Hwang , Hyeong Il Kim , Wang Mo Jung , Dong Hun Lee
CPC分类号： C23C16/45555 , H01M4/0428 , H01M4/366 , H01M4/505 , H01M4/525 , H01M2004/028
摘要： A method of preparing a positive electrode active material for a secondary battery includes preparing a lithium composite transition metal oxide which includes nickel, cobalt, and manganese and contains 60 mol % or more of the nickel among all metals except lithium, adding a moisture absorbent and the lithium composite transition metal oxide into an atomic layer deposition (ALD) reactor, and adding a coating metal precursor into the atomic layer deposition (ALD) reactor and forming a metal oxide coating layer on surfaces of particles of the lithium composite transition metal oxide by atomic layer deposition (ALD).
-
公开(公告)号：US20240059581A1
公开(公告)日：2024-02-22
申请号：US18269719
申请日：2022-05-10
发明人： Tae Gu Yoo , Boram Lee , Hae Jung Jung , Wang Mo Jung , Byungchun Park
IPC分类号： C01G53/00
CPC分类号： C01G53/42 , C01P2002/54 , C01P2006/40
摘要： An additive for a positive electrode of a lithium secondary battery comprising a lithium transition metal oxide, Li3PO4 and Li5AlO4. The lithium transition metal oxide is doped with aluminum. The additive comprising Li3PO4 and Li5AlO4 together with the lithium transition metal oxide has a function of improving battery stability when applied to a positive electrode of a lithium secondary battery. Specifically, when a general lithium transition metal oxide is applied to the positive electrode of a lithium secondary battery, it may cause a side reaction with the electrolyte solution to generate gas in the battery, which may cause a problem with poor stability. However, Li3PO4 and Li5AlO4 are uniformly mixed with the lithium transition metal oxide or partially form a coating layer, and some aluminum is doped into the lithium transition metal oxide to inhibit the lithium transition metal oxide from causing side reactions with the electrolyte solution.
-
公开(公告)号：US20230387413A1
公开(公告)日：2023-11-30
申请号：US18031387
申请日：2022-06-02
发明人： Chi Ho Jo , Wang Mo Jung , Hye Hyeon Kim , Tae Gu Yoo , Jin Tae Hwang , Hae Jung Jung , Jong Wook Heo
IPC分类号： H01M4/62 , H01M4/505 , H01M4/525 , H01M4/131 , H01M4/36 , H01M4/48 , H01M4/587 , H01M4/134 , H01M4/133 , H01M10/44 , H01M10/0525
CPC分类号： H01M4/62 , H01M4/505 , H01M4/525 , H01M4/131 , H01M4/364 , H01M4/483 , H01M4/587 , H01M4/134 , H01M4/133 , H01M10/44 , H01M10/0525 , H01M2004/028
摘要： A lithium secondary battery and a method of manufacturing the lithium secondary battery are provided. In the lithium secondary battery, a positive electrode additive represented by Formula 1 as an irreversible additive is included in a positive electrode mixture layer, and a ratio (CC/DC) of an initial charge capacity (CC) to an initial discharge capacity (DC) is adjusted within a specific range, thereby reducing the amount of oxygen gas generated in the charging/discharging of the lithium secondary battery, and at the same time, inhibiting self-discharging and improving an operating voltage by improving the open circuit voltage of the battery in initial activation and/or subsequent high-temperature storage. The lithium secondary battery including the same can be effectively used as a power source for mid-to-large devices such as electric vehicles.
-
7.发明公开公开(公告)号：US20230261185A1
公开(公告)日：2023-08-17
申请号：US18005134
申请日：2022-02-21
发明人： Tae Gu Yoo , Wang Mo Jung , Chi Ho Jo , Ji Hye Kim , Hae Jung Jung , Jong Wook Heo
IPC分类号： H01M4/525 , H01M4/485 , H01M4/04 , H01M4/62 , H01M10/052
CPC分类号： H01M4/525 , H01M4/485 , H01M4/0404 , H01M4/625 , H01M10/052 , H01M2004/028
摘要： Provided are a sacrificial positive electrode material with a reduced gas generation amount and a method of preparing the same. The sacrificial positive electrode material includes a lithium cobalt zinc oxide represented by Chemical Formula 1 (LixCo(1-y)ZnyO4) and the sacrificial positive electrode material has a powder electrical conductivity of 1×10−4 S/cm to 1×10−2 S/cm. The sacrificial positive electrode material can reduce the generation of gas, particularly, oxygen (O2) gas, during charging and discharging of a battery after activation and achieve a high charge/discharge capacity by including a lithium cobalt metal oxide represented by Chemical Formula 1 (LixCo(1-y)ZnyO4), which is doped with a specific fraction of zinc, and by having a powder electrical conductivity adjusted within a specific range, and thus the stability and lifespan of a battery including the same are effectively enhanced.
-
8.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.
-
公开(公告)号：US20230095804A1
公开(公告)日：2023-03-30
申请号：US17795049
申请日：2021-01-19
发明人： Sang Min Park , Eun Sol Lho , Sung Bin Park , Seul Ki Kim , Wen Xiu Wang , Wang Mo Jung
IPC分类号： H01M4/525 , H01M10/0525 , H01M4/505
摘要： A positive electrode active material, and a positive electrode and a lithium secondary battery including the same are disclosed herein. In some embodiments, a positive electrode active material includes a lithium composite transition metal oxide containing nickel, cobalt, and manganese and having a nickel content for 60 mol % or more, based on metals (M) excluding lithium, and is in the form of single particles having an average particle diameter (D50) of 1 to 10 μm, wherein a 100-nm region extending from the surface toward the center of a single particle has crystal structures of a Fd3M and a Fm3m space group, and a phase ratio is 0.2 to 0.7, which is a ratio of a first portion of a maximum straight length of the 100-nm region occupied by the crystal structure of the Fd3M space group to a second portion occupied by the crystal structure of the Fm3m space group.
-
公开(公告)号：US20220223861A1
公开(公告)日：2022-07-14
申请号：US17606929
申请日：2020-12-23
发明人： Hakyoon Kim , Gi Beom Han , Sang Wook Lee , Sora Baek , Jungmin Han , Wang Mo Jung
摘要： 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 is provided. 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. 4000 A - 2000 ≤ B ( ppm ) [ Equation 1 ] wherein 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 A is 0.5 or less, the minimum value of B is 6000 ppm. The positive electrode also has a harness at which cracks occur in a measuring rod of 2 pi (Ø) or more.
-
-
-
-
-
-
-
-
-
搜索结果
70 条记录 (耗时 0.029 秒)
