公开(公告)号：US20210265615A1

公开(公告)日：2021-08-26

申请号：US17252805

申请日：2019-09-11

Applicant: LG Chem, Ltd.

Inventor： Sang Soon Choi ,  Hwa Seok Chae ,  Jae Geun Kim ,  Seong Hoon Kang

IPC: H01M4/04 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525

Abstract: A method of preparing a positive electrode material is provided. The method includes mixing a first positive electrode active material precursor having an average particle diameter (D50) of 10 μm to 30 μm with a lithium-containing raw material and pre-sintering the mixture to obtain a first pre-sintered product, mixing a second positive electrode active material precursor having an average particle diameter (D50) different from that of the first positive electrode active material precursor with a lithium-containing raw material and pre-sintering the mixture to obtain a second pre-sintered product, disintegrating each of the first pre-sintered product and the second pre-sintered product, and mixing the disintegrated first pre-sintered product and the disintegrated second pre-sintered product and main-sintering the mixture to obtain a positive electrode material.

公开(公告)号：US09905850B2

公开(公告)日：2018-02-27

申请号：US14514788

申请日：2014-10-15

Applicant: LG Chem, Ltd.

Inventor： Ick Soon Kwak ,  Seung Beom Cho ,  Hwa Seok Chae

IPC: H01M4/505 ,  H01M10/052 ,  C01G45/12

CPC classification number: H01M4/505 ,  C01G45/1214 ,  C01G45/1221 ,  C01P2002/54 ,  C01P2002/72 ,  C01P2002/74 ,  C01P2004/03 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/40 ,  H01M10/052 ,  H01M2220/20 ,  Y02E60/122

Abstract: Provided are polycrystalline lithium manganese oxide particles represented by Chemical Formula 1 and a method of preparing the same: Li(1+x)Mn(2-x-y-f)AlyMfO(4-z)   where M is sodium (Na), or two or more mixed elements including Na, 0≦x≦0.2, 0

公开(公告)号：US20230083070A1

公开(公告)日：2023-03-16

申请号：US17799752

申请日：2021-06-14

Applicant: LG Chem, Ltd.

Inventor： Ick Soon Kwak ,  Chang Wan Chae ,  Sang Soon Choi ,  Hwa Seok Chae

IPC: H01M4/525 ,  H01M4/505 ,  H01M4/04 ,  C01G53/00

Abstract: A method of preparing a positive electrode active material is disclosed herein. In some embodiments, the method includes firing a first mixture at 400° C. to 700° C. to prepare a primary firing product, wherein the first mixture has a positive electrode active material precursor having a specific composition, a first lithium-containing source material, and optionally, an aluminum-containing source material, and firing a second mixture at a temperature above the firing temperature of the first mixture to prepare a positive electrode active material, wherein the second mixture has the primary firing product, a second lithium-containing source material, and a specific doping element M1-containing source material. The method is capable of degrading the cake strength of a primary firing product and providing a positive electrode active material having excellent quality by dividing a firing process into two steps.

公开(公告)号：US20150030928A1

公开(公告)日：2015-01-29

申请号：US14514987

申请日：2014-10-15

Applicant: LG CHEM, LTD.

Inventor： Ick Soon Kwak ,  Seung Beom Cho ,  Hwa Seok Chae

IPC: H01M4/505 ,  H01M4/04 ,  H01M4/131 ,  H01M4/1391 ,  H01M4/36 ,  H01M4/62

CPC classification number: H01M4/505 ,  H01M4/366 ,  H01M4/62 ,  H01M10/052 ,  H01M2220/20 ,  Y02E60/122

Abstract: Provided are a cathode active material including polycrystalline lithium manganese oxide and a boron-containing coating layer on a surface of the polycrystalline lithium manganese oxide, and a method preparing the same.Since the cathode active material according to an embodiment of the present invention may prevent direct contact between the polycrystalline lithium manganese oxide and an electrolyte solution by including the boron-containing coating layer on the surface of the polycrystalline lithium manganese oxide, the cathode active material may prevent side reactions between the cathode active material and the electrolyte solution. In addition, since limitations, such as the Jahn-Teller distortion and the dissolution of Mn2+, may be addressed by structurally stabilizing the polycrystalline lithium manganese oxide, tap density, life characteristics, and charge and discharge capacity characteristics of a secondary battery may be improved.

Abstract translation: 提供了一种包括多晶锂锰氧化物和多晶锂锰氧化物表面上的含硼涂层的阴极活性材料及其制备方法。 由于根据本发明的实施方案的阴极活性材料可以通过在多晶锂锰氧化物的表面上包含含硼涂层来防止多晶锂锰氧化物与电解质溶液之间的直接接触，所以阴极活性材料可以 防止正极活性物质与电解液之间的副反应。 另外，由于可以通过结构稳定多晶锂锰氧化物来解决诸如Jahn-Teller变形和Mn 2+的溶解的限制，可以提高二次电池的振实密度，寿命特性和充放电容量特性 。

公开(公告)号：US20230307629A1

公开(公告)日：2023-09-28

申请号：US18018616

申请日：2021-08-06

Applicant: LG Chem, Ltd.

Inventor： Na Ri Kim ,  Young Su Park ,  Woo Hyun Kim ,  Sang Soon Choi ,  Hwa Seok Chae ,  Hyun Uk Kim ,  Dong Jin Kim ,  Dong Ryoung Kang

IPC: H01M4/525 ,  H01M4/505 ,  H01M4/485 ,  H01M4/04

CPC classification number: H01M4/525 ,  H01M4/505 ,  H01M4/485 ,  H01M4/0471 ,  H01M2004/028

Abstract: A positive electrode active material precursor and method of preparing the same are disclosed herein. In some embodiments, a positive electrode active material precursor includes a particle having a first region, a second region, and a third region, a composition of the particle is represented by the following Formula 1 or Formula 2:


[M1aM2bM3cM4d](OH)2  [Formula 1]



[M1aM2bM3cM4d]O·OH  [Formula 2]

M1, M2, and M3 are different from each other and independently selected from the group consisting of Ni, Co, and Mn, M4 is at least one selected from the group consisting of B, Mg, Ca, Al, Ti, V, Cr, Fe, Zn, Ga, Y, Zr, Nb, Mo, Ta, and W, and 0

公开(公告)号：US20220231289A1

公开(公告)日：2022-07-21

申请号：US17613276

申请日：2021-03-23

Applicant: LG Chem, Ltd.

Inventor： Woo Ram Lee ,  Woo Hyun Kim ,  Dong Jin Kim ,  Hwa Seok Chae ,  Hyun Uk Kim

IPC: H01M4/525 ,  H01M4/04 ,  H01M4/505 ,  C01G53/00

Abstract: Provided is a method of manufacturing a positive electrode active material, which includes: (A) preparing a positive electrode active material precursor which includes a core portion including randomly aggregated primary particles and a shell portion surrounding the core portion and formed of primary particles oriented in a direction from a particle center to the outside and in which a ratio of a crystal grain size in the (100) plane to a crystal grain size in the (001) plane of the primary particles forming the shell portion is 3 or more; and (B) mixing the positive electrode active material precursor with a lithium-containing raw material and firing the mixture, wherein the lithium transition metal oxide has an average particle diameter (D50) that is 0.01% to 20% reduced as compared to an average particle diameter (D50) of the positive electrode active material precursor, in which a particle size is reduced during the manufacture of the positive electrode active material and thus particle strength and energy density are improved.

公开(公告)号：US10236499B2

公开(公告)日：2019-03-19

申请号：US14654966

申请日：2014-07-25

Applicant: LG Chem, Ltd.

Inventor： Ick Soon Kwak ,  Seung Beom Cho ,  Hwa Seok Chae

IPC: H01M4/485 ,  H01M4/525 ,  H01M4/505 ,  C01B35/12 ,  H01M4/131 ,  H01M10/0525 ,  H01M4/58 ,  C01G45/12 ,  H01M4/04 ,  H01M4/36 ,  C01G45/00 ,  H01M10/052 ,  H01M4/02

Abstract: Provided are polycrystalline lithium manganese oxide particles represented by Chemical Formula 1 and a method of preparing the same: Li(1+x)Mn(2−x−y−f)AlyMfO(4−z)   where M is any one selected from the group consisting of boron (B), cobalt (Co), vanadium (V), lanthanum (La), titanium (Ti), nickel (Ni), zirconium (Zr), yttrium (Y), and gallium (Ga), or two or more elements thereof, 0≤x≤0.2, 0

公开(公告)号：US20160028077A1

公开(公告)日：2016-01-28

申请号：US14437085

申请日：2014-10-31

Applicant: LG Chem, Ltd.

Inventor： Ick Soon Kwak ,  Seung Beom Cho ,  Hwa Seok Chae ,  Yeo June Yoon

IPC: H01M4/36 ,  H01M10/0525

CPC classification number: H01M4/366 ,  H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M10/052 ,  H01M10/0525 ,  H01M2004/028 ,  H01M2220/20 ,  H01M2220/30 ,  Y02T10/7011

Abstract: Provided is a cathode active material including lithium transition metal oxide particles and composite particles, wherein the composite particles include any one selected from the group consisting of yttria stabilized zirconia (YSZ), gadolinia-doped ceria (GDC), lanthanum strontium gallate magnesite (LSGM), lanthanum strontium manganite (LSM), and nickel (Ni)—YSZ, or a mixture of two or more thereof, and the cathode active material includes the composite particles having a single-phase peak when analyzed by X-ray diffraction (XRD).A cathode active material according to an embodiment of the present invention may not only minimize the reduction in capacity or output of a secondary battery, but may also further improve life characteristics.

Abstract translation: 提供了包含锂过渡金属氧化物颗粒和复合颗粒的正极活性材料，其中复合颗粒包括选自氧化钇稳定的氧化锆（YSZ），掺钆氧化铈（GDC），镧镧镓镧菱镁矿（LSGM） ），亚锰酸镧镧（LSM）和镍（Ni）-YSZ，或其两种以上的混合物，正极活性物质通过X射线衍射（XRD）分析时具有单相峰值的复合粒子 ）。 根据本发明的实施方案的阴极活性材料可以不仅使二次电池的容量或输出的减小最小化，还可以进一步改善寿命特性。

公开(公告)号：US11824193B2

公开(公告)日：2023-11-21

申请号：US17613276

申请日：2021-03-23

Applicant: LG Chem, Ltd.

Inventor： Woo Ram Lee ,  Woo Hyun Kim ,  Dong Jin Kim ,  Hwa Seok Chae ,  Hyun Uk Kim

IPC: H01M4/525 ,  H01M4/04 ,  H01M4/505 ,  C01G53/00 ,  H01M4/02

CPC classification number: H01M4/525 ,  C01G53/50 ,  H01M4/0471 ,  H01M4/0497 ,  H01M4/505 ,  C01P2002/60 ,  C01P2004/61 ,  C01P2006/40 ,  H01M2004/021 ,  H01M2004/028

Abstract: Provided is a method of manufacturing a positive electrode active material, which includes: (A) preparing a positive electrode active material precursor which includes a core portion including randomly aggregated primary particles and a shell portion surrounding the core portion and formed of primary particles oriented in a direction from a particle center to the outside and in which a ratio of a crystal grain size in the (100) plane to a crystal grain size in the (001) plane of the primary particles forming the shell portion is 3 or more; and (B) mixing the positive electrode active material precursor with a lithium-containing raw material and firing the mixture, wherein the lithium transition metal oxide has an average particle diameter (D50) that is 0.01% to 20% reduced as compared to an average particle diameter (D50) of the positive electrode active material precursor.

公开(公告)号：US09905851B2

公开(公告)日：2018-02-27

申请号：US14514987

申请日：2014-10-15

Applicant: LG Chem, Ltd.

Inventor： Ick Soon Kwak ,  Seung Beom Cho ,  Hwa Seok Chae

IPC: H01M4/62 ,  H01M4/36 ,  H01M4/505 ,  H01M10/052

CPC classification number: H01M4/505 ,  H01M4/366 ,  H01M4/62 ,  H01M10/052 ,  H01M2220/20 ,  Y02E60/122

Abstract: Provided are a cathode active material including polycrystalline lithium manganese oxide and a boron-containing coating layer on a surface of the polycrystalline lithium manganese oxide, and a method preparing the same. Since the cathode active material according to an embodiment of the present invention may prevent direct contact between the polycrystalline lithium manganese oxide and an electrolyte solution by including the boron-containing coating layer on the surface of the polycrystalline lithium manganese oxide, the cathode active material may prevent side reactions between the cathode active material and the electrolyte solution. In addition, since limitations, such as the Jahn-Teller distortion and the dissolution of Mn2+, may be addressed by structurally stabilizing the polycrystalline lithium manganese oxide, tap density, life characteristics, and charge and discharge capacity characteristics of a secondary battery may be improved.