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公开(公告)号：US20210151754A1
公开(公告)日：2021-05-20
申请号：US16771139
申请日：2019-01-23
Applicant: LG Chem, Ltd.
Inventor： So Ra Baek , Min Suk Kang , Sang Wook Lee , Wang Mo Jung , Dong Hun Lee , Hye Lim Jeon , Eun Sol Lho
IPC: H01M4/525 , H01M4/505 , H01M4/36 , H01M4/04 , H01M10/0525
Abstract: A positive electrode active material for a secondary battery includes a lithium composite transition metal oxide including nickel (Ni), cobalt (Co), and manganese (Mn), and a glassy coating layer formed on surfaces of particles of the lithium composite transition metal oxide, wherein, in the lithium composite transition metal oxide, an amount of the nickel (Ni) in a total amount of transition metals is 60 mol % or more, and an amount of the manganese (Mn) is greater than an amount of the cobalt (Co), and the glassy coating layer includes a glassy compound represented by Formula 1. LiaM1bOc [Formula 1] wherein, M1 is at least one selected from the group consisting of boron (B), aluminum (Al), silicon (Si), titanium (Ti), and phosphorus (P), and 1≤a≤4, 1≤b≤8, and 1≤c≤20.
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公开(公告)号：US10355275B2
公开(公告)日：2019-07-16
申请号：US14906488
申请日：2014-08-18
Applicant: LG Chem, Ltd.
Inventor： Sang Min Park , Sun Sik Shin , Byung Chun Park , Hye Lim Jeon , Bo Ram Lee
Abstract: Disclosed are a precursor for preparation of a lithium composite transition metal oxide, a method for preparing the same and a lithium composite transition metal oxide obtained from the same. More particularly, the transition metal precursor which has a composition represented by Formula 1 below and is prepared in an aqueous transition metal solution, mixed with a transition metal-containing salt, including an alkaline material, the method for preparing the same and the lithium composite transition metal oxide obtained from the same are disclosed. MnaMb(OH1-x)2-yAy (1) wherein M is at least one selected form the group consisting of Ni, Ti, Co, Al, Cu, Fe, Mg, B, Cr, Zr, Zn and Period II transition metals; A is at least one selected form the group consisting of anions of PO4, BO3, CO3, F and NO3, and 0.5≤a≤1.0; 0≤b≤0.5; a+b=1; 0
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公开(公告)号：US09780370B2
公开(公告)日：2017-10-03
申请号：US14770170
申请日：2014-04-08
Applicant: LG Chem, Ltd.
Inventor： Bo Ram Lee , Hye Lim Jeon , Sun Sik Shin , Sang Wook Lee , Wang Mo Jung
IPC: H01M4/505 , C01G53/00 , H01M10/0525 , H01M10/052
CPC classification number: H01M4/505 , C01G53/56 , C01P2002/32 , C01P2006/40 , H01M10/052 , H01M10/0525 , H01M2220/20 , H01M2220/30 , Y02E60/122
Abstract: Disclosed is a lithium manganese (Mn)-based oxide including Mn as an essential transition metal and having a layered crystal structure, in which the amount of Mn is greater than that of other transition metal(s), the lithium manganese-based oxide exhibits flat level section characteristics in which release of oxygen occurs together with lithium deintercalation during first charging in a high voltage range of 4.4 V or higher, and at least one of a transition metal layer including Mn and an oxygen layer is substituted or doped with a pillar element.
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公开(公告)号：US11569501B2
公开(公告)日：2023-01-31
申请号：US16647935
申请日：2018-09-19
Applicant: LG Chem, Ltd.
Inventor： Dong Hun Lee , Hye Lim Jeon , Sang Wook Lee , Eun Sol Lho , Wang Mo Jung , Min Suk Kang , So Ra Baek , Ji Young Park
IPC: H01M4/485 , H01M10/0525 , H01M4/58 , H01M4/02
Abstract: Provided are various embodiments of a positive electrode for a secondary battery, which in one embodiment includes a first positive electrode material mixture layer formed on a positive electrode collector, and a second positive electrode material mixture layer formed on the first positive electrode material mixture layer, wherein the first positive electrode material mixture layer has an operating voltage of 4.25 V to 6.0 V and includes an active material for overcharge which generates lithium and gas during charge; a method of preparing such a positive electrode for a secondary battery; and a lithium secondary battery including such a positive electrode.
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公开(公告)号：US10784510B2
公开(公告)日：2020-09-22
申请号：US15761649
申请日：2017-02-03
Applicant: LG Chem, Ltd.
Inventor： Hye Lim Jeon , Dong Hun Lee , Sung Bin Park , Wang Mo Jung , Seong Hoon Kang
IPC: H01M4/485 , C01G23/00 , H01M4/131 , H01M10/052 , H01M10/0525 , H01M4/02
Abstract: The present invention relates to an active material for a lithium secondary battery, which includes a secondary particle formed by agglomeration of primary particles which include a lithium titanium composite oxide represented by Formula 1 or Formula 2, wherein a pore volume is in a range of 0.001 cm3/g to 0.05 cm3/g, and a method of preparing the same, wherein the active material for a lithium secondary battery according to the present invention may maintain an adequate pore volume even during rolling, because strength of the secondary particle is improved by controlling a particle diameter of the primary particle by introducing a metallic element.
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Patent Agency Ranking
6.发明授权公开(公告)号：US10665859B2
公开(公告)日：2020-05-26
申请号：US15746910
申请日：2017-03-22
Applicant: LG Chem, Ltd.
Inventor： Sung Bin Park , Dong Hun Lee , Hye Lim Jeon , Wang Mo Jung , Seong Hoon Kang
Abstract: The present invention provides a negative electrode active material for a secondary battery, the negative electrode active material including a core that includes a lithium titanium oxide and a surface treatment layer located on a surface of the core, wherein the surface treatment layer includes a boron-containing lithium oxide at an amount that allows a boron content to have a molar ratio of 0.002 to 0.02 with respect to 1 mole of the lithium titanium oxide, and when 2 g of the negative electrode active material is titrated at pH 5 or lower using 0.1 M HCl, a titrated amount is 0.9 to 1.5 ml, and a secondary battery including the same. The negative electrode active material exhibits an excellent capacity recovery rate and an output characteristic when applied to a battery and is capable of reducing gas generation by preventing electrolyte decomposition.
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公开(公告)号：US11894558B2
公开(公告)日：2024-02-06
申请号：US17042518
申请日：2019-04-05
Applicant: LG Chem, Ltd.
Inventor： Seul Ki Kim , Hye Lim Jeon , Tae Gon Kim , Wang Mo Jung , Sang Wook Lee
IPC: H01M4/525 , H01M4/04 , H01M4/133 , H01M4/1393 , H01M4/02
CPC classification number: H01M4/525 , H01M4/0471 , H01M4/133 , H01M4/1393 , H01M2004/027 , H01M2004/028
Abstract: A positive electrode active material includes a core and a coating layer disposed on the core, wherein the core includes Li1+xMO2+y, wherein M is at least one element selected from the group consisting of nickel (Ni), cobalt (Co), and copper (Cu), and 1≤x≤5 and 0≤y≤2, and the coating layer includes carbon-based particles, wherein the carbon-based particle includes a structure in which a plurality of graphene sheets are connected, the carbon-based particle has an oxygen content of 1 wt % or more in the carbon-based particle, and the carbon-based particle has a D/G peak ratio of 1.55 or less during Raman spectrum measurement. A method of preparing the positive electrode active material, a positive electrode including the positive electrode active material, and a secondary battery including the positive electrode are also provided.
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公开(公告)号：US10903489B2
公开(公告)日：2021-01-26
申请号：US16394624
申请日：2019-04-25
Applicant: LG Chem, Ltd.
Inventor： Sang Min Park , Sun Sik Shin , Byung Chun Park , Hye Lim Jeon , Bo Ram Lee
Abstract: Disclosed are a precursor for preparation of a lithium composite transition metal oxide, a method for preparing the same and a lithium composite transition metal oxide obtained from the same. More particularly, the transition metal precursor which has a composition represented by Formula 1 below and is prepared in an aqueous transition metal solution, mixed with a transition metal-containing salt, including an alkaline material, the method for preparing the same and the lithium composite transition metal oxide obtained from the same are disclosed. MnaMb(OH1-x)2-yAy (1) wherein M is at least one selected form the group consisting of Ni, Ti, Co, Al, Cu, Fe, Mg, B, Cr, Zr, Zn and Period II transition metals; A is at least one selected form the group consisting of anions of PO4, BO3, CO3, F and NO3, and 0.5≤a≤1.0; 0≤b≤0.5; a+b=1; 0
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公开(公告)号：US10559816B2
公开(公告)日：2020-02-11
申请号：US15362028
申请日：2016-11-28
Applicant: LG Chem, Ltd.
Inventor： Woo Yeon Kong , Hye Lim Jeon , Sung Bin Park , Wang Mo Jung , Seong Hoon Kang
Abstract: The present disclosure suppresses, by uniformly coating lithium transition metal composite oxide particles with LiwNbxOy (1≤w≤8, 1≤x≤13, 1≤y≤20), a direct contact between a positive electrode active material and a liquid electrolyte and thereby suppresses a side reaction between the positive electrode active material and the liquid electrolyte, and improves stability at high temperatures and high voltages, and in particular, is effective in enhancing battery performance by forming Li2O—Nb2O5 through reacting the coating layer with Li present on the surfaces of the lithium transition metal composite oxide particles.
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公开(公告)号：US20170155132A1
公开(公告)日：2017-06-01
申请号：US15362028
申请日：2016-11-28
Applicant: LG Chem, Ltd.
Inventor： Woo Yeon Kong , Hye Lim Jeon , Sung Bin Park , Wang Mo Jung , Seong Hoon Kang
IPC: H01M4/36 , H01M4/505 , H01M4/525 , H01M10/0525 , H01M4/485
CPC classification number: H01M4/366 , H01M4/131 , H01M4/485 , H01M4/505 , H01M4/525 , H01M10/0525 , Y02T10/7011
Abstract: The present disclosure suppresses, by uniformly coating lithium transition metal composite oxide particles with LiwNbxOy (1≦w≦8, 1≦x≦13, 1≦y≦20), a direct contact between a positive electrode active material and a liquid electrolyte and thereby suppresses a side reaction between the positive electrode active material and the liquid electrolyte, and improves stability at high temperatures and high voltages, and in particular, is effective in enhancing battery performance by forming Li2O—Nb2O5 through reacting the coating layer with Li present on the surfaces of the lithium transition metal composite oxide particles.
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