公开(公告)号：US20240079565A1

公开(公告)日：2024-03-07

申请号：US18384665

申请日：2023-10-27

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jing WANG ,  Qiang CHEN ,  Qi WU ,  Dong ZHAO ,  Jingpeng FAN ,  Na LIU

IPC: H01M4/36 ,  H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M10/0565

CPC classification number: H01M4/366 ,  H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M10/0565 ,  H01M2004/028

Abstract: A modified positive electrode material includes an inner core and a cladding layer. The inner core is a positive electrode material, and the cladding layer includes a polymer electrolyte body and a ferroelectric ceramic material dispersed in the polymer electrolyte body.

公开(公告)号：US20240014386A1

公开(公告)日：2024-01-11

申请号：US18472030

申请日：2023-09-21

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Dong ZHAO ,  Qi WU ,  Jingpeng FAN ,  Qiang CHEN ,  Jing WANG ,  Na LIU

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

CPC classification number: H01M4/366 ,  H01M4/505 ,  H01M4/525 ,  H01M4/0471 ,  H01M2004/028

Abstract: A positive electrode material includes a core including a lithium-rich manganese-based positive electrode material, and a coating layer enveloping outer surface of the core and including a composite material of a transition metal oxoacid salt and carbon. The transition metal in the transition metal oxoacid salt is selected from at least one of Ti, Mo, W, V, Ta, Nb or Nd and the composite material has a mesh structure.

公开(公告)号：US20230278886A1

公开(公告)日：2023-09-07

申请号：US18140637

申请日：2023-04-28

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Chongheng SHEN ,  Qi WU ,  Shuxing HUAN ,  Qiang CHEN ,  Na LIU

IPC: C01G53/04 ,  C01G53/00 ,  H01M50/204

CPC classification number: C01G53/04 ,  C01G53/006 ,  H01M50/204 ,  C01P2006/40 ,  C01P2006/80 ,  C01P2004/61 ,  C01P2004/80 ,  C01P2006/12 ,  C01P2002/74

Abstract: Embodiments of this application provide a ternary precursor material, a preparation method thereof, and a positive electrode active substance. A ternary precursor material may be provided in this application and may include a core and a shell, wherein (1) the core may have a molecular formula of NixCoyMn1-x-y(OH)2±a, where 0.8≤x

公开(公告)号：US20220181622A1

公开(公告)日：2022-06-09

申请号：US17682057

申请日：2022-02-28

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Shushi DOU ,  Chunhua HU ,  Yao JIANG ,  Qi WU ,  Jinhua HE ,  Bin DENG

IPC: H01M4/525 ,  H01M4/505 ,  H01M4/131 ,  H01M10/0525

Abstract: This application discloses a positive electrode active material, including secondary particles and a coating layer applied on an exterior surface of each of the secondary particles, where the secondary particle includes a lithium transition metal oxide that contains a doping element M1, the coating layer includes an oxide of element M2, M1 is selected from one or more of Si, Ti, Cr, Mo, V, Ge, Se, Zr, Nb, Ru, Rh, Pd, Sb, Te, Ce, and W, and M2 is selected from one or more of Mg, Al, Ca, Ce, Ti, Zr, Zn, Y, and B; a relative deviation of local mass concentration of element M1 in the secondary particle is less than 20%; and the secondary particle from the core to the exterior surface of the particle includes a plurality of layers of primary particles arranged along radial direction of the secondary particle.

公开(公告)号：US20240413308A1

公开(公告)日：2024-12-12

申请号：US18424934

申请日：2024-01-29

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Jingpeng FAN ,  Qi WU ,  Zhenguo ZHANG ,  Qiang CHEN ,  Dong ZHAO ,  Na LIU ,  Jing WANG

IPC: H01M4/36 ,  C01G53/00 ,  H01M4/02 ,  H01M4/505 ,  H01M4/58 ,  H01M10/052

Abstract: This application provides a lithium-nickel-manganese-containing composite oxide, a preparation method thereof, and a positive electrode plate, secondary battery, and electric apparatus containing the same. The lithium-nickel-manganese-containing composite oxide has a core-shell structure and includes a core and a shell enveloping surface of the core, where the core includes Lix(NiyMn2-y)1-mMmO4. M includes one or more selected from Mg, elements from group IVB to group VIB, elements from group IIIA to group VA, and lanthanide elements, where 0.95≤x≤1.10, 0.40≤y≤0.60, and 0.001≤m≤0.015. The shell includes lithium aluminum phosphate and optionally includes lithium aluminum phosphate and aluminum phosphate.

公开(公告)号：US20230083478A1

公开(公告)日：2023-03-16

申请号：US17969630

申请日：2022-10-19

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Qi WU ,  Qiang Chen ,  Jingpeng Fan ,  Tao Huang ,  Qisen Huang

IPC: H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/485 ,  C01G53/00

Abstract: The present application provides a high-nickel ternary positive electrode active material, which comprises a core Li1+a[LixCoyMnzMb]O2, a fast ionic conductor LiαAlXSiYO4 of a first shell layer, an oxide of an element R of a second shell layer, and a transition layer LipRqOw formed between the first shell layer and the second shell layer. In the high-nickel ternary positive electrode active material of the present application, the surface impurity lithium amount is significantly reduced, and by creatively converting the surface impurity lithium into effective components in the fast ionic conductors LiαAlXSiYO4 and LipRqOw which accelerate the intercalation/deintercalation of lithium ions in the core material, the decomposition and gas production of an electrolyte solution caused by the surface impurity lithium is greatly improved, such that a high-nickel ternary lithium-ion battery has high energy density as well as good cycle performance and safety performance.

公开(公告)号：US20220185699A1

公开(公告)日：2022-06-16

申请号：US17686458

申请日：2022-03-04

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Qi WU ,  Changyin JI ,  Jinhua HE ,  Liangbin LIU ,  Jing SUN

IPC: C01G53/00 ,  H01M10/0525

Abstract: This application relates to a positive electrode active material and a preparation method thereof, a lithium-ion secondary battery and related battery module, battery pack, and apparatus. The positive electrode active material of this application includes a composite oxide of lithium, boron, and a transition metal element, where the transition metal element includes element nickel, and a molar ratio of element nickel to element lithium ranges from 0.55 to 0.95; the positive electrode active material includes secondary particles formed by primary particles; at least 50% of the primary particles in the secondary particle are arranged radially; in the outermost layer of the secondary particle, 70% or more of the primary particles each have at least two parallel sides; and in a cross section through the center of the secondary particle, 60% or more of the primary particles each have at least two parallel sides.

公开(公告)号：US20220185697A1

公开(公告)日：2022-06-16

申请号：US17683392

申请日：2022-03-01

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Shushi DOU ,  Chunhua HU ,  Yao JIANG ,  Qi WU ,  Jinhua HE ,  Bin DENG

IPC: C01G53/00 ,  H01M10/0525

Abstract: This application discloses a positive electrode active material and a preparation method thereof, a positive electrode plate, a lithium-ion secondary battery, and a battery module, battery pack and apparatus related thereto. The positive electrode active material includes secondary particles formed by agglomeration of primary particles, where the primary particles are a lithium transition metal oxide, and a transition metal site of the lithium transition metal oxide includes nickel and a doping element; and a Young's modulus E of the primary particles satisfies 175 GPa≤E≤220 GPa.

公开(公告)号：US20220185696A1

公开(公告)日：2022-06-16

申请号：US17683389

申请日：2022-03-01

Applicant: Contemporary Amperex Technology Co., Limited

Inventor： Shushi DOU ,  Chunhua HU ,  Yao JIANG ,  Qi WU ,  Jinhua HE ,  Bin DENG

IPC: C01G53/00 ,  H01M10/0525

Abstract: The present application discloses a positive electrode active material including a lithium nickel cobalt manganese oxide, the molar content of nickel in the lithium nickel cobalt manganese oxide accounts for 60%-90% of the total molar content of nickel, cobalt and manganese, and the lithium nickel cobalt manganese oxide has a layered crystal structure of a space group R3m; a transition metal layer of the lithium nickel cobalt manganese oxide includes a doping element, and the local mass concentration of the doping element in particles of the positive electrode active material has a relative deviation of 20% or less; and in a differential scanning calorimetry spectrum of the positive electrode active material in a 78% delithiation state, an initial exothermic temperature of a main exothermic peak is 200° C. or more, and an integral area of the main exothermic peak is 100 J/g or less.

公开(公告)号：US20210111405A1

公开(公告)日：2021-04-15

申请号：US17131012

申请日：2020-12-22

Applicant: CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Inventor： Qi WU ,  Jinhua HE ,  Changyin JI

IPC: H01M4/525 ,  H01M4/505 ,  H01M4/485 ,  H01M4/04 ,  H01M10/0525

Abstract: This application provides a positive active material and a preparation method thereof, an electrochemical battery, a battery module, a battery pack, and an apparatus. The positive active material includes an inner core and a coating layer, where the coating layer coats a surface of the inner core. The inner core is selected from a ternary material with a molecular formula of Li1+a[NixCoyMnzMbM′c]O2−dYd, where distribution of each of the doping elements M, M′, and Y in the inner core meets the following condition: there is a reduced mass concentration gradient from an outer side of the inner core to a center of the inner core. The positive active material herein features high gram capacity, high structural stability, and high thermal stability, so that the electrochemical battery has excellent cycle performance and storage performance and high initial discharge gram capacity.