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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
Applicant: LG Energy Solution, Ltd.
Inventor： Hae Jung Jung , Wang Mo Jung , Chi Ho Jo , Tae Gu Yoo , Jin Tae HWANG , Jong Wook Heo , Hyeon Jin Cho
CPC classification number: H01M4/366 , H01M4/525 , H01M4/62 , H01M2004/021 , H01M2004/028
Abstract: 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.-
12.发明公开公开(公告)号：US20240204270A1
公开(公告)日：2024-06-20
申请号：US17925654
申请日：2022-04-19
Applicant: LG Energy Solution, Ltd.
Inventor： Shul Kee Kim , Sang Seung Oh , Hye Hyeon Kim , Chi Ho Jo
CPC classification number: H01M10/446 , H01M4/505 , H01M4/525 , H01M4/583 , H01M10/052 , H01M2004/027 , H01M2004/028
Abstract: A method of activating a lithium secondary battery and a lithium secondary battery prepared by the same are disclosed herein. In some embodiments, a method includes charging the lithium secondary battery to a state of charge (SOC) of 90% or more in an activation step, wherein the lithium secondary battery having an electrode assembly comprising a positive electrode and an electrolyte, wherein the positive electrode comprises a mixture layer having a positive electrode active material and a positive electrode additive, and degassing the lithium secondary battery during the activation step to removing gas inside the secondary battery. The method is advantageous in that a side reaction gas can be removed by performing degassing during activation, thereby forming a stable SEI film on the electrode surface to improve battery performance and battery safety.
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13.发明公开公开(公告)号：US20230378433A1
公开(公告)日：2023-11-23
申请号：US18031473
申请日：2022-06-02
Applicant: LG Energy Solution, Ltd.
Inventor： Chi Ho Jo , Wang Mo Jung , Hye Hyeon Kim , Tae Gu Yoo , Jin Tae Hwang , Hae Jung Jung , Jong Wook Heo
IPC: H01M4/131 , H01M10/0525 , H01M4/62 , H01M4/38 , H01M4/134
CPC classification number: H01M4/131 , H01M10/0525 , H01M4/625 , H01M4/386 , H01M4/134 , H01M2004/028
Abstract: The present technology provides a positive electrode for a lithium secondary battery and a lithium secondary battery including the same. In the positive electrode, a positive electrode additive represented by Formula 1 is contained in a positive electrode mixture layer, and specific X-ray diffraction (XRD) and/or extended X-ray absorption fine-structure (EXAFS) peak(s) are controlled for cobalt remaining in the positive electrode mixture layer after initial charging to SOC 100% to have a specific oxidation number, thereby reducing side reactions caused by the irreversible additive, that is, the positive electrode additive, and reducing the amount of gas such as oxygen generated during charging/discharging. Therefore, the lithium secondary battery has an excellent effect of improving battery safety and electrical performance.
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公开(公告)号：US20230343931A1
公开(公告)日：2023-10-26
申请号：US18026460
申请日：2022-05-06
Applicant: LG Energy Solution, Ltd.
Inventor： Su Min Lee , Sang Seung Oh , Hye Hyeon Kim , Chi Ho Jo
CPC classification number: H01M4/364 , H01M10/052 , H01M4/587 , H01M4/386 , H01M4/133 , H01M4/134 , H01M2004/027
Abstract: The present disclosure relates to aA negative electrode for a lithium secondary battery and a lithium secondary battery including the same, wherein the negative electrode includes a negative electrode active material which contains a carbon material and a silicon material, contains Si in a specific content, and has a form and/or structure in which the size of each material is controlled so that it is possible to improve the charging/discharging capacity and efficiency of the negative electrode, suppress the side reaction between the negative electrode active material and the electrolyte during the charging and discharging while solving a problem of the negative electrode mixture layer peeling due to the expansion and contraction of the negative electrode active material. In addition, since the lithium secondary battery according to of the present technology includes a positive electrode containing a specific positive electrode active material and a positive electrode additive together with the negative electrode to further improve the initial charging/discharging efficiency and capacity of the battery, there is an advantage in that electrical performance of the battery is excellent.
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公开(公告)号：US20230307626A1
公开(公告)日：2023-09-28
申请号：US18003587
申请日：2022-05-06
Applicant: LG Energy Solution, Ltd.
Inventor： Hye Hyeon Kim , Sang Seung Oh , Chi Ho Jo
IPC: H01M4/525 , H01M50/46 , H01M4/04 , H01M4/505 , H01M4/62 , H01M4/36 , H01M4/38 , H01M4/583 , H01M10/44 , H01M10/052
CPC classification number: H01M4/525 , H01M4/0404 , H01M4/364 , H01M4/386 , H01M4/505 , H01M4/583 , H01M4/625 , H01M10/052 , H01M10/446 , H01M50/46 , H01M2004/028
Abstract: Provided is a lithium secondary battery comprising an electrolyte and an electrode assembly, wherein the electrode assembly comprises a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode. The positive electrode comprises a positive electrode current collector and a positive electrode mixture layer positioned on the positive electrode current collector, wherein the positive electrode mixture layer comprises a positive electrode active material, a positive electrode additive represented by Chemical Formula 1 (LipCo(1-q)M1qO4), a conductive material, and a binder. The lithium secondary battery satisfies Expression 1 (ALCO/A0) with 2.0 or more and 20.0 or less after charging to a state of charge (SoC) of 100% in an activation process under conditions of a voltage of 3.5 V to 4.5 V and a current of 0.1 to 0.5 C.
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Patent Agency Ranking
公开(公告)号：US20230083736A1
公开(公告)日：2023-03-16
申请号：US17941284
申请日：2022-09-09
Applicant: LG Energy Solution, Ltd.
Inventor： Jin Tae Hwang , Wang Mo Jung , Chi Ho Jo , Tae Gu Yoo , Hae Jung Jung , Jong Wook Heo , Hyeon Jin Cho
IPC: H01M4/525 , C01G53/00 , H01M4/505 , H01M10/052
Abstract: 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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17.发明公开公开(公告)号：US20240194857A1
公开(公告)日：2024-06-13
申请号：US18285784
申请日：2022-08-12
Applicant: LG Energy Solution, Ltd. , Sookmyung Women's University Industry-Academic Cooperation Foundation
Inventor： Chi Ho Jo , Wang Mo Jung , Won Hee Ryu , You Jin Kim , Su Ji Kim
IPC: H01M4/36 , C01G53/00 , H01M4/02 , H01M4/131 , H01M4/1391 , H01M4/48 , H01M4/505 , H01M4/525 , H01M10/052
CPC classification number: H01M4/364 , C01G53/50 , H01M4/131 , H01M4/1391 , H01M4/48 , H01M4/505 , H01M4/525 , H01M10/052 , H01M2004/021 , H01M2004/028
Abstract: A positive electrode with excellent life characteristics and high capacity is provided by using a positive electrode additive of ZrO2-x(0
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18.发明公开公开(公告)号：US20240014400A1
公开(公告)日：2024-01-11
申请号：US18025254
申请日：2022-04-19
Applicant: LG Energy Solution, Ltd.
Inventor： Gyeong Seop Lee , Sang Seung Oh , Hye Hyeon Kim , Chi Ho Jo , Tae Gu Yoo
CPC classification number: H01M4/628 , H01M4/131 , H01M4/625 , H01M10/052 , H01M4/0404 , H01M4/525 , H01M4/505 , H01M2004/028
Abstract: Provided is a positive electrode for a lithium secondary battery and a lithium secondary battery including the same, wherein the positive electrode is manufactured by using a pre-dispersion containing a positive electrode additive represented by Chemical Formula 1 and a conductive material having a linear structure in a positive electrode mixture layer as an irreversible additive and, by adjusting the electrode sheet resistance to satisfy a specific range, it is possible to reduce the amount of oxygen gas generated during charging and discharging, as well as easily improve the charging and discharging efficiency of the lithium secondary battery.
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19.发明公开公开(公告)号：US20230331583A1
公开(公告)日：2023-10-19
申请号：US18004743
申请日：2022-02-18
Applicant: LG Energy Solution, Ltd.
Inventor： Tae Gu Yoo , Wang Mo Jung , Chi Ho Jo , Ji Hye Kim , Hae Jung Jung , Jong Wook Heo
IPC: C01G51/00 , H01M10/052
CPC classification number: C01G51/42 , C01G51/006 , H01M10/052 , C01P2004/61 , C01P2006/40
Abstract: Provided are a sacrificial positive electrode material with a reduced gas generation amount and a method of preparing the same. The method includes calcinating a raw material mixture of lithium oxide (Li2O) and cobalt oxide (CoO) to prepare a lithium cobalt metal oxide, wherein the lithium oxide (Li2O) has an average particle size (D50) of 50 µm or less, and the resulting sacrificial positive electrode material has an electrical conductivity of 1 × 10-4 S/cm or more. The method of preparing a sacrificial positive electrode material can reduce the generation of gas, particularly, oxygen (O2) gas, in an electrode assembly during charging of a battery by adjusting the electrical conductivity of the sacrificial positive electrode material within a specific range using lithium oxide that satisfies a specific size, and thus the stability and lifespan of the battery including the same can be effectively enhanced.
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20.发明公开公开(公告)号：US20230268499A1
公开(公告)日：2023-08-24
申请号：US18004118
申请日：2022-05-06
Applicant: LG Energy Solution, Ltd.
Inventor： Kyung Eun Sun , Sang Seung Oh , Hye Hyeon Kim , Chi Ho Jo
CPC classification number: H01M4/525 , H01M4/364 , H01M4/505 , H01M4/625 , H01M2004/028
Abstract: Provided is a positive electrode slurry for a positive electrode for a lithium secondary battery, which is manufactured using the same. The positive electrode slurry is composed of a two-liquid type composition, contains the positive electrode additive represented by Chemical Formula 1 (LipCo(1-q)M1qO4), which is used as an irreversible additive, in a large amount, and contains the first liquid whose viscosity is adjusted within a specific range (i.e. 5,000 to 8,000 cps). Thus, not only is there an advantage in that the dispersibility and workability of the positive electrode additive are excellent, but also since it is possible to suppress side reactions while minimizing the loss of the positive electrode additive contained in the positive electrode slurry, the state stability of the positive electrode slurry can be improved, and thus the electrical properties of the positive electrode manufactured using the positive electrode slurry are excellent.
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