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公开(公告)号：US20250140811A1
公开(公告)日：2025-05-01
申请号：US18930911
申请日：2024-10-29
Applicant: SAMSUNG SDI CO., LTD.
Inventor： Seok Mun KANG , Dowook JUN , Young-Ki KIM , Youngsun KONG , Sungwook DOO , Sung Ho CHOO , Jaesang YOON , Gwiwoon KANG , Byungwuk KANG , Jaeyong JEONG
Abstract: A positive electrode active material includes a plurality of core particles including a layered lithium nickel-manganese-based composite oxide having a nickel content (e.g., amount) of greater than or equal to about 60 mol % based on 100 mol % of a total metal composition of the lithium nickel-manganese-based composite oxide excluding lithium, and a coating layer located on the surface of the core particle and containing Al and Ti. Also disclosed are a method of preparing the positive electrode active material, and a positive electrode and rechargeable lithium battery including the same.
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公开(公告)号：US20250136468A1
公开(公告)日：2025-05-01
申请号：US18929014
申请日：2024-10-28
Applicant: SAMSUNG SDI CO., LTD.
Inventor： Sung Ho CHOO , Young-Ki KIM , Youngsun KONG , Seok Mun KANG , Jaesang YOON , Sungwook DOO , Gwiwoon KANG , Dowook JUN , Byungwuk KANG , Jaeyong JEONG
Abstract: Disclosed are a positive electrode active material, a method of preparing the same, a positive electrode, and a rechargeable lithium battery, the positive electrode active material including core particles including a layered lithium nickel-manganese-based composite oxide having a nickel content of greater than or equal to about 60 mol % based on 100 mol % of a total metal excluding lithium in the layered lithium nickel-manganese-based composite oxide, and a coating layer on the surface of the core particle and including Al, wherein an Al content based on a total of 100 at % of Ni, Mn, and Al on a surface of the positive electrode active material is about 20 at % to about 33 at %.
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公开(公告)号：US20250070136A1
公开(公告)日：2025-02-27
申请号：US18814098
申请日：2024-08-23
Applicant: SAMSUNG SDI CO., LTD.
Inventor： Byungwuk KANG , Sungwook DOO , Young-Ki KIM , Sung Ho CHOO , Dowook JUN , Gwiwoon KANG , Jaeyong JEONG , Youngsun KONG , Seok Mun KANG , Jaesang YOON
IPC: H01M4/36 , H01M4/02 , H01M4/04 , H01M4/525 , H01M10/0525
Abstract: A positive electrode active material includes a core particle including a layered lithium nickel-manganese-based composite oxide, a first coating layer provided on the surface of the core particle and including Al, and a second coating layer provided on the first coating layer and including Ni. A method for preparing a positive electrode active material includes: mixing a layered nickel-manganese composite hydroxide and a lithium raw material and performing a first heat treatment to obtain a lithium nickel-manganese-based composite oxide, adding an aluminum (Al) raw material to an aqueous solvent, adding the lithium nickel-manganese composite oxide thereto and mixing them, then adding a nickel (Ni) raw material and mixing them, and drying the mixture and performing a second heat treatment.
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公开(公告)号：US20240409434A1
公开(公告)日：2024-12-12
申请号：US18736610
申请日：2024-06-07
Applicant: SAMSUNG SDI CO., LTD.
Inventor： Sung Ho CHOO , Young-Ki KIM , Youngsun KONG , Seok Mun KANG , Jaesang YOON , Sungwook DOO , Gwiwoon KANG , Do-Wook JUN , Byungwuk Kang , Jaeyong JEONG
IPC: C01G53/00 , H01M10/0525
Abstract: A positive electrode active material of a rechargeable lithium battery may include a core particle including a lithium nickel-manganese-aluminum-based composite oxide, and a coating layer disposed on a surface of the core particle and including aluminum, wherein a nickel content of the core particle is about 60 mol % to about 80 mol % and an aluminum content of the core particle is about 1 mol % to about 3 mol % based on about 100 mol % of a total metal excluding lithium, and an aluminum content of the coating layer is about 0.1 mol % to about 2 mol % based on about 100 mol % of the total metal excluding lithium.
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