公开(公告)号：US20230076517A1

公开(公告)日：2023-03-09

申请号：US17820420

申请日：2022-08-17

Applicant: Samsung SDI Co., Ltd.

Inventor： Jangwook Lee ,  Wooyoung Yang ,  Ickkyu Choi

IPC: H01M4/525 ,  H01M4/36 ,  H01M4/04

Abstract: A cathode active material for lithium secondary batteries, a method of preparing the same, a cathode including the same, and a lithium secondary battery including the cathode are provided. The cathode active material includes nickel-based lithium metal oxide secondary particles each including a plurality of large primary particles, the nickel-based lithium metal oxide secondary particles having a hollow structure having pores therein, each of the plurality of large primary particles having a size of about 2 μm to about 6 μm, and each of the nickel-based lithium metal oxide secondary particles having a size of about 10 μm to about 18 μm; and a cobalt compound-containing coating layer on surfaces of the nickel-based lithium metal oxide secondary particles.

公开(公告)号：US11417875B2

公开(公告)日：2022-08-16

申请号：US16670850

申请日：2019-10-31

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Soonkie Hong ,  Young-Ki Kim ,  Jungjoon Park ,  Soonrewl Lee ,  Youngjoo Chae ,  Ickkyu Choi ,  Mingzi Hong

IPC: H01M4/36 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/02

Abstract: A positive active material for a rechargeable lithium battery includes a nickel-based lithium transition metal oxide including a secondary particle in which a plurality of primary particles are agglomerated, wherein the secondary particle includes a core and a surface layer surrounding the core, and the surface layer includes a plurality of primary particles and a nano-sized cobalt-based lithium transition metal oxide absorbed in the surface layer, between the primary particles.

公开(公告)号：US11031594B2

公开(公告)日：2021-06-08

申请号：US16192729

申请日：2018-11-15

Applicant: Samsung SDI Co., Ltd.

Inventor： Youngjoo Chae ,  Kitae Kim ,  Young-Ki Kim ,  Jungjoon Park ,  Dong-Hwan Yu ,  Soonrewl Lee ,  Hyerim Lee ,  Ickkyu Choi ,  Soonkie Hong ,  Kisoo Lee

IPC: H01M4/525 ,  H01M4/505 ,  H01M10/0525 ,  H01M4/485 ,  H01M4/36 ,  H01M4/02

Abstract: A positive active material for a rechargeable lithium battery, and a rechargeable lithium battery and a battery module including the same are provided. The positive active material may include a lithium nickel-manganese-cobalt composite oxide with a coating layer on the surface. The coating layer on the surface may include a lithium oxide including Al and/or W, for example, Al and W.

公开(公告)号：US11552293B2

公开(公告)日：2023-01-10

申请号：US16809460

申请日：2020-03-04

Applicant: Samsung SDI Co., Ltd.

Inventor： Young-Ki Kim ,  Jungjoon Park ,  Soonrewl Lee ,  Youngjoo Chae ,  Ickkyu Choi ,  Mingzi Hong ,  Soonkie Hong

IPC: H01M4/525 ,  H01M4/04 ,  H01M4/1391 ,  H01M4/36 ,  H01M10/0525 ,  H01M4/02

Abstract: A positive active material for a rechargeable lithium battery includes a first compound represented by Chemical Formula 1, and a second compound having a smaller particle diameter than the first compound and represented by Chemical Formula 2, wherein the first compound and the second compound have a Ni content of about 50 at % to about 60 at % based on a total amount of metal elements excluding Li. A rechargeable lithium battery including the first compound and the second compound satisfies Relation 1: Vs

公开(公告)号：US11515535B2

公开(公告)日：2022-11-29

申请号：US16809460

申请日：2020-03-04

Applicant: Samsung SDI Co., Ltd.

Inventor： Young-Ki Kim ,  Jungjoon Park ,  Soonrewl Lee ,  Youngjoo Chae ,  Ickkyu Choi ,  Mingzi Hong ,  Soonkie Hong

IPC: H01M4/525 ,  H01M4/04 ,  H01M4/1391 ,  H01M4/36 ,  H01M10/0525 ,  H01M4/02

Abstract: A positive active material for a rechargeable lithium battery includes a first compound represented by Chemical Formula 1, and a second compound having a smaller particle diameter than the first compound and represented by Chemical Formula 2, wherein the first compound and the second compound have a Ni content of about 50 at % to about 60 at % based on a total amount of metal elements excluding Li. A rechargeable lithium battery including the first compound and the second compound satisfies Relation 1: Vs

公开(公告)号：US20220320509A1

公开(公告)日：2022-10-06

申请号：US17596927

申请日：2020-06-18

Applicant: Samsung SDI Co., Ltd.

Inventor： Heeyoung Chu ,  Doori Oh ,  Yungu Cho ,  Hyun Soh ,  Yoonyoung Choi ,  Ickkyu Choi

IPC: H01M4/583 ,  H01M4/38 ,  H01M10/0525 ,  H01M4/62

Abstract: The present disclosure relates to a composite anode and a secondary battery including the same, the composite anode including a silicon-containing structure; a first carbon material; a second carbon material; and a conductive material, wherein the first carbon material has a specific surface area (BET) value of 1.5 m2/g or less, a rate of change of the specific surface area (m2/g) to an increase in particle size (μm) is −0.07 to −0.04 m2/μm·g, and an area occupied by pores in a cross-section of the first carbon material is 10% or less.

公开(公告)号：US20220411277A1

公开(公告)日：2022-12-29

申请号：US17809534

申请日：2022-06-28

Applicant: Samsung SDI Co., Ltd.

Inventor： Byungwuk Kang ,  Wooyoung Yang ,  Ickkyu Choi

IPC: C01D15/02 ,  H01M10/052 ,  C01G51/00 ,  C01G53/00

Abstract: Provided are a positive active material for a lithium secondary battery, a method of preparing the positive active material, a positive electrode for a lithium secondary battery including the positive active material, and a lithium secondary battery including a positive electrode including the positive active material, in which the positive active material may include a nickel-based lithium metal oxide secondary particle including a plurality of large primary particles, the nickel-based lithium metal oxide secondary particle may have a hollow structure having a pore inside, a size of each of the large primary particles may be in a range of about 2 micrometers (μm) to about 6 μm, and a size of the nickel-based lithium metal oxide secondary particle may be in a range of about 10 μm to about 18 μm.

公开(公告)号：US11515521B2

公开(公告)日：2022-11-29

申请号：US16670739

申请日：2019-10-31

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Mingzi Hong ,  Young-Ki Kim ,  Jungjoon Park ,  Soonrewl Lee ,  Youngjoo Chae ,  Ickkyu Choi ,  Soonkie Hong

IPC: H01B1/08 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M4/02

Abstract: A positive active material for a rechargeable lithium battery includes a first compound represented by Chemical Formula 1, and a second compound represented by Chemical Formula 2 and having a smaller particle diameter than the first compound, wherein at least one of the first compound and the second compound includes a core and a surface layer surrounding the core: Lia1Nix1Coy1M11-x1-y1O2,  Chemical Formula 1 Lia2Nix2Coy2M21-x2-y2O2,  Chemical Formula 2 wherein M1 and M2 are each independently at least one selected from Mn, Al, Cr, Fe, V, Mg, Ti, Zr, Nb, Mo, W, Cu, Zn, Ga, In, Sn, La, and Ce. The atomic concentration (at %) of nickel (Ni) with respect to the total amount of non-lithium metals is higher in the surface layer than in the core, and an amount of cation mixing is less than or equal to about 3%.

公开(公告)号：US11312871B2

公开(公告)日：2022-04-26

申请号：US16603649

申请日：2018-05-15

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Changhong Ko ,  Dongwan Seo ,  Hyeonsun Choi ,  Ickkyu Choi ,  Jungjoon Park ,  Jinkyu Park ,  Sam-Jin Park ,  Yangseob Kim

IPC: H01M50/446 ,  H01M50/449 ,  H01M50/42 ,  H01M50/417 ,  H01M10/0525 ,  C09D7/61 ,  C08J7/04 ,  H01M50/44 ,  H01M50/403 ,  H01M50/411 ,  H01M50/429 ,  C08J7/043 ,  C08K3/22 ,  C09D5/18 ,  C09D133/20 ,  H01M4/131 ,  H01M4/133 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M4/66 ,  H01M10/052 ,  H01M50/46 ,  H01M4/02

Abstract: The present invention relates to a separator for a secondary battery and a lithium secondary battery including the separator, the separator including: a porous substrate and a heat-resistant layer disposed on at least one surface of the porous substrate, wherein the heat-resistant layer includes an acrylic heat-resistant binder, an adhering binder, and a filler, the acrylic heat-resistant binder including a structural unit derived from (meth)acrylate or (meth)acrylic acid, a cyano group-containing structural unit, and a sulfonate group-containing structural unit, the adhering binder includes a structural unit including a structural unit including hydroxyl group, a structural unit including an acetate group, and a structural unit including an alkali metal.

公开(公告)号：US11271202B2

公开(公告)日：2022-03-08

申请号：US16547422

申请日：2019-08-21

Applicant: Samsung SDI Co., Ltd.

Inventor： Soonkie Hong ,  Young-Ki Kim ,  Soonrewl Lee ,  Young-Hun Lee ,  Jiyeon Jang ,  Ickkyu Choi ,  Mingzi Hong

IPC: H01M4/525 ,  H01M4/131 ,  H01M10/0525 ,  C01G51/00 ,  H01M4/02

Abstract: A positive active material for use in a positive electrode and a rechargeable lithium battery includes a lithium cobalt oxide including a secondary particle having an average particle diameter of about 15 μm to about 25 μm, wherein the secondary particle includes a plurality of primary particles having an average particle diameter of about 2 μm to about 10 μm, and the positive active material has a pellet density of greater than or equal to about 3.80 g/cm3. A method of manufacturing the positive active material includes heat-treating a cobalt-containing compound at a temperature of greater than or equal to about 900° C. to form a cobalt oxide comprising Co3O4 and CoO, and reacting the cobalt oxide with a lithium compound to prepare the lithium cobalt oxide.