公开(公告)号：US20230098411A1

公开(公告)日：2023-03-30

申请号：US17936544

申请日：2022-09-29

Applicant: Samsung SDI Co., Ltd.

Inventor： Pilsang YUN ,  Jongmin KIM ,  Hyunbeom KIM ,  Sangin PARK ,  Hanseul LEE

IPC: H01M4/525 ,  H01M10/0525 ,  H01M4/58 ,  H01M4/04

Abstract: Provided are a positive electrode active material for a rechargeable lithium battery, a method of preparing the same, and a rechargeable lithium battery including the same, the positive electrode active material for a rechargeable lithium battery including a secondary particle in which a plurality of primary particles including a lithium nickel-based composite oxide are aggregated, wherein at least a portion of the primary particles are arranged radially, a boron coating layer on the surface of the secondary particles and containing lithium borate, and a boron-doped layer inside the primary particle exposed to the surface of the secondary particle.

公开(公告)号：US20230352658A1

公开(公告)日：2023-11-02

申请号：US18150097

申请日：2023-01-04

Applicant: SAMSUNG SDI CO., LTD.

Inventor： Pilsang YUN ,  Hyunbeom KIM ,  Hanseul LEE ,  Do-Yu KIM

IPC: H01M4/36 ,  H01M4/62 ,  H01M4/525 ,  H01M4/04 ,  H01M50/46 ,  H01M10/0525

CPC classification number: H01M4/364 ,  H01M4/62 ,  H01M4/525 ,  H01M4/0471 ,  H01M50/46 ,  H01M10/0525 ,  H01M2004/028

Abstract: A method of preparing a positive electrode active material for a rechargeable lithium battery is provided to include: mixing a first nickel-based composite hydroxide in a form of a secondary particle in which a plurality of primary particles are aggregated and at least a portion of the primary particles have a radially arranged structure, a second lithium nickel-based composite oxide having a monolith structure, a lithium raw material, and a boron raw material; and performing heat-treatment.

公开(公告)号：US20230327101A1

公开(公告)日：2023-10-12

申请号：US17989547

申请日：2022-11-17

Applicant: SAMSUNG SDI CO., LTD

Inventor： Pilsang YUN ,  Hyunbeom KIM ,  Hanseul LEE ,  Do-Yu KIM ,  Yongchan YOU

IPC: H01M4/525 ,  C01G53/00 ,  H01M4/131

CPC classification number: H01M4/525 ,  C01G53/42 ,  H01M4/131 ,  H01M2004/028

Abstract: A positive electrode active material for a rechargeable lithium battery, and a rechargeable lithium battery including the same are provided. The positive electrode active material includes a lithium nickel-based composite oxide wherein the positive electrode active material is in a form of secondary particles in which a plurality of primary particles are aggregated and at least a portion of the primary particles are radially arranged, in a cross-section of the secondary particles, a number ratio of the primary particles having a cross-sectional area of less than about 0.1 µm2 is greater than or equal to about 65%, and a full width at half maximum (FWHM) of the peak corresponding to the (003) plane in the X-ray diffraction analysis for the positive electrode active material is less than or equal to about 0.125.