公开(公告)号：US20240063381A1

公开(公告)日：2024-02-22

申请号：US18498176

申请日：2023-10-31

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Bangrun WANG ,  Zhenguo ZHANG ,  Sihui WANG ,  Na LIU

IPC: H01M4/505 ,  H01M4/583 ,  H01M4/525 ,  H01M4/04 ,  H01M10/052

CPC classification number: H01M4/505 ,  H01M4/583 ,  H01M4/525 ,  H01M4/0471 ,  H01M4/0404 ,  H01M10/052 ,  H01M2004/021

Abstract: Provided are an electrode active material, a method for preparing the electrode active material, an electrode plate, and a battery. The electrode active material includes carbon-coated metal oxide particles. The metal oxide particles satisfy a formula (2):


AcMdOe  (2),

where element A is selected from one or more of alkali metal elements or alkaline earth metal elements; element M is selected from one or more of transition metal elements having a relative atomic mass smaller than 65; and c>0, d>0, and e>0.

公开(公告)号：US20230261178A1

公开(公告)日：2023-08-17

申请号：US17971500

申请日：2022-10-21

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Bangrun WANG ,  Na LIU ,  Chengdu LIANG ,  Yongchao LIU ,  Xin SUN ,  Haotian XIE

IPC: H01M4/36 ,  H01M4/525 ,  H01M4/505 ,  H01M4/485 ,  H01M4/58 ,  H01M4/04

CPC classification number: H01M4/366 ,  H01M4/525 ,  H01M4/505 ,  H01M4/485 ,  H01M4/5825 ,  H01M4/0404 ,  H01M2004/028

Abstract: This application provides a composite positive-electrode material and a preparation method thereof, a positive-electrode plate, a secondary battery, and a battery module, a battery pack, and an apparatus containing such secondary battery. The composite positive-electrode material includes a core and a coating layer covering at least part of a surface of the core, where the core includes a positive-electrode pre-lithiation material, the positive-electrode pre-lithiation material includes a lithium-rich metal oxide, and the coating layer includes a positive-electrode active material.

公开(公告)号：US20220399540A1

公开(公告)日：2022-12-15

申请号：US17873861

申请日：2022-07-26

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Bangrun WANG ,  Na Liu

IPC: H01M4/36 ,  H01M4/505 ,  H01M4/58 ,  H01M4/525 ,  H01M10/0525

Abstract: This application provides a composite positive electrode material and a preparation method thereof, a secondary battery, a battery group including the secondary battery, and an electric apparatus including the secondary battery. The composite positive electrode material includes a lithium-rich metal oxide and a positive electrode active material covering at least a partial surface of the lithium-rich metal oxide, where the positive electrode active material is formed through in-situ reaction between a positive electrode active material precursor and a free lithium compound on the surface of the lithium-rich metal oxide.

公开(公告)号：US20220367871A1

公开(公告)日：2022-11-17

申请号：US17874548

申请日：2022-07-27

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xingbu CHEN ,  Xin SUN ,  Xiao CHEN ,  Zhenglun CHEN ,  Haotian XIE ,  Bangrun WANG ,  Geng LI

IPC: H01M4/525 ,  H01M10/0525 ,  H01M4/505 ,  H01M4/587 ,  H01M10/0567 ,  H01M4/58

Abstract: A secondary battery includes a positive electrode, a negative electrode, and an electrolyte. The positive electrode includes a positive-electrode active substance layer, the positive-electrode active substance layer contains a pre-lithiation agent, and a molecular formula of the pre-lithiation agent is LixNiaCu1−a−bMbO2, where 1≤x≤2, 0

公开(公告)号：US20230395875A1

公开(公告)日：2023-12-07

申请号：US18446063

申请日：2023-08-08

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Xin SUN ,  Haotian XIE ,  Bangrun WANG

IPC: H01M10/42 ,  H01M4/58 ,  H01M4/62 ,  C08F114/22

CPC classification number: H01M10/4235 ,  H01M4/5825 ,  H01M4/623 ,  C08F114/22 ,  H01M2004/028

Abstract: A positive electrode slurry composition, and a positive electrode sheet prepared thereof, a secondary battery, a battery module, a battery pack and a power consumption apparatus are described. The positive electrode slurry composition includes a positive electrode active material, a pre-lithiation material, and a binder, where the binder is shown in Formula (II)




where R1, R2, x, y, and z have meanings defined in the specification, a volume average particle size is D10≥0.3 μm, a volume average particle size D50 is 0.5-10 μm. The positive electrode slurry composition includes the binder in Formula (II) and the positive electrode active material with a specific particle size range, which is not easy to agglomerate and has high stability, and is conducive to improving machinability of the positive electrode sheet, and the binder in Formula (II) is conducive to improving bonding strength between the positive electrode active material and the pre-lithiation material.

公开(公告)号：US20230139006A1

公开(公告)日：2023-05-04

申请号：US17985261

申请日：2022-11-11

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Limei ZHANG ,  Peipei CHEN ,  Bangrun WANG ,  Haotian XIE

IPC: H01M4/62 ,  H01M10/0567

Abstract: This application provides a secondary battery, including a positive electrode plate and an electrolytic solution. The positive electrode plate includes a positive current collector and a positive film layer. The positive film layer includes a positive lithium supplementing agent. The positive lithium supplementing agent is selected from LixTOy, where x≥2, y≥2, and T is a transition metal. The electrolytic solution includes a sulfide, and a valence of sulfur element in the sulfide is less than or equal to +4. The secondary battery according to this application achieves a high energy density and a high first-cycle Coulombic efficiency, improves a solid electrolyte interphase after being chemically formed and fully charged, achieves a low internal resistance of a battery cell, and can normally exert the capacity of the secondary battery.

公开(公告)号：US20240079551A1

公开(公告)日：2024-03-07

申请号：US18387477

申请日：2023-11-07

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Bangrun WANG ,  Na LIU

IPC: H01M4/04 ,  H01M4/525

CPC classification number: H01M4/0471 ,  H01M4/525 ,  H01M2004/021

Abstract: Provided are an electrode active material precursor, a method for preparing the same, an electrode active material, and a battery. The electrode active material precursor includes carbon-composite oxide particles. The oxide satisfies a formula (1):


MaOb  (1),

where element M is selected from one or more of transition metal elements having a relative atomic mass smaller than 65, and optionally being selected from one or more of Ni, Co, Fe, Mn, Zn, Mg, Ca, Cu, Mn, Sn, Mo, Ru, Ir, V, Nb, or Cr, a>0, and b>0. The carbon-composite oxide particles have a powder resistivity smaller than 100 Ω·cm.

公开(公告)号：US20230207812A1

公开(公告)日：2023-06-29

申请号：US18074416

申请日：2022-12-02

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Bangrun WANG ,  Na LIU ,  Chengdu LIANG ,  Yongchao LIU ,  Xin SUN ,  Haotian XIE

IPC: H01M4/62 ,  H01M4/525 ,  H01M10/052 ,  H01M4/131 ,  C01G53/00

CPC classification number: H01M4/62 ,  H01M4/525 ,  H01M10/052 ,  H01M4/131 ,  C01G53/50 ,  H01M2004/028

Abstract: This application discloses a lithium supplement for lithium secondary batteries, a preparation method thereof, and a lithium secondary battery, a battery module, a battery pack, and an apparatus. Tests show that the lithium supplement of this application can maintain its own stability and low metal dissolution during long-term use of lithium secondary batteries, effectively improving energy density of lithium secondary batteries and ensuring a low self-discharge rate of lithium secondary batteries, thereby ensuring that the lithium secondary battery has high energy density, long cycle life, and high safety.