公开(公告)号：US11223041B2

公开(公告)日：2022-01-11

申请号：US16393182

申请日：2019-04-24

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Daoyi Jiang ,  Zhihuan Chen ,  Hang Cui ,  Yuansen Xie

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/134 ,  H01M4/131 ,  H01M4/133 ,  H01M10/0569 ,  H01M10/0525 ,  H01M4/62

Abstract: The present application relates to an anode active material and an anode, an electrochemical device and an electronic device using the same. Specifically, the present application provides an anode active material, including a lithiated silicon-oxygen material and a coating layer, where the coating layer and the lithiated silicon-oxygen material at least have one or more structural units selected from formulae CF2a, CHFb and CH2c therebetween, where a, b, and c are integers greater than or equal to 6. The anode active material of the present application has high stability and is suitable for being subjected to aqueous processing to obtain the anode.

公开(公告)号：US20230021755A1

公开(公告)日：2023-01-26

申请号：US17951570

申请日：2022-09-23

Applicant: Ningde Amperex Technology Limited

Inventor： Zhihuan Chen ,  Daoyi Jiang ,  Ting Yi ,  Hang Cui

IPC: H01M4/134 ,  H01M4/38 ,  H01M4/48

Abstract: A negative electrode plate includes a current collector and an active substance layer provided on the current collector, where the active substance layer includes a silicon-based material, and a proportion by mass of element silicon in the active substance layer has a minimum value X1 and a maximum value X2 among different locations of a same area size, where a value of X1/X2 is M, and M≥0.7; and a weight loss rate of the active substance layer under thermogravimetric (TG) analysis within 800° C. has a minimum value Y1 and a maximum value Y2 among different locations of a same area size, where a value of Y1/Y2 is N, and N≥0.7. In this disclosure, the silicon-based material and a binder in the active substance layer are uniformly dispersed, improving C-rate performance and cycling performance of the electrochemical apparatus and reducing swelling of an electrode assembly.

公开(公告)号：US11145852B2

公开(公告)日：2021-10-12

申请号：US16299409

申请日：2019-03-12

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Daoyi Jiang ,  Hang Cui ,  Yuansen Xie

IPC: H01M4/134 ,  H01M4/131 ,  H01M4/133 ,  H01M4/36 ,  H01M4/38 ,  H01M4/46 ,  H01M4/58 ,  H01M10/0525 ,  H01M4/02

Abstract: The present application relates to an anode active material and an anode, an electrochemical device and an electronic device using same. Specifically, the present application provides an anode active material, including a lithiated silicon-oxygen material and a coating layer, where there is at least a Si—O-M bond between the coating layer and the lithiated silicon-oxygen material, where M is selected from one or more of an aluminum element, a boron element and a phosphorus element. The anode active material of the present application has high stability and is suitable for aqueous processing to be prepared into an anode.

公开(公告)号：US12237504B2

公开(公告)日：2025-02-25

申请号：US17312208

申请日：2019-12-17

Applicant: Ningde Amperex Technology Limited

Inventor： Daoyi Jiang ,  Hang Cui ,  Yuansen Xie

IPC: H01M4/48 ,  H01M4/02 ,  H01M4/04 ,  H01M4/36 ,  H01M4/583 ,  H01M10/0525

Abstract: An anode material includes a silicon compound SiOx, where x is about 0.5 to 1.5; an oxide MeOy layer, the MeOy layer coating the silicon compound SiOx, where y is about 0.5 to 3; and a carbon layer, the carbon layer coating the MeOy layer. Me includes at least one of Al, Si, Ti, Mn, V, Cr, Co, and Zr. The surface of the MeOy layer adjacent to the carbon layer has an open pore structure, and at least part of the open pore structure is filled with the carbon layer. The anode material improves the cycle performance of the electrochemical device and significantly reduce the impedance of the electrochemical device.

公开(公告)号：US12191478B2

公开(公告)日：2025-01-07

申请号：US17274810

申请日：2019-11-19

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Zhihuan Chen ,  Daoyi Jiang ,  Hang Cui ,  Yuansen Xie

IPC: H01M4/133 ,  H01M4/134 ,  H01M4/36 ,  H01M4/38 ,  H01M4/48 ,  H01M4/587 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/02

Abstract: The present application relates to an anode active material and a preparation method thereof, and a device using the anode active material. The anode active material provided by the present application includes anode active particles having silicon element, a first conductive material and a second conductive material, wherein the first conductive material and the second conductive material form a three-dimensional conductive network structure, at least a portion of the anode active particles are accommodated in the three-dimensional conductive network structure, and a ratio of the total surface area of the first conductive material to the total surface area of the anode active particles is less than 1000. The capacity retention rate and expansion ratio of the anode active material with progression of the cycle are significantly improved.

公开(公告)号：US12183915B2

公开(公告)日：2024-12-31

申请号：US17440723

申请日：2020-03-05

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Zhihuan Chen ,  Daoyi Jiang ,  Hang Cui ,  Yuansen Xie

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/48 ,  H01M4/587 ,  H01M10/0525

Abstract: The present application relates to an anode material, and an electrochemical device and an electronic device using the same. The anode material of the present application includes: a silicon compound SiOx, where x is 0.5-1.5; an oxide MeOy layer, the MeOy layer coating at least a portion of the silicon compound SiOx, where Me includes at least one of Al, Si, Ti, Mn, V, Cr, Co or Zr, where y is 0.5-3; and a carbon nanotube layer, the carbon nanotube layer coating at least a portion of the MeOy layer. The anode material can significantly enhance the cycle performance and rate performance of the electrochemical device, and significantly reduce the impedance of the electrochemical device.

公开(公告)号：US20230042519A1

公开(公告)日：2023-02-09

申请号：US17957179

申请日：2022-09-30

Applicant: Ningde Amperex Technology Limited

Inventor： Chao Wang ,  Ting Zhang ,  Daoyi Jiang ,  Hang Cui

IPC: H01M4/36 ,  H01M4/62 ,  H01M50/46 ,  H01M4/38 ,  H01M4/583

Abstract: A negative electrode material includes a composite of a silicon-based material (1), a polymer (2), and carbon nanotubes (3), where the polymer (2) contains a first group and a second group, the first group is chemically bonded to the carbon nanotubes (3), and the second group is chemically bonded to the silicon-based material (1). Both the carbon nanotubes (3) and the polymer (2) containing two groups are applied to surfaces of particles of the silicon-based material (1). The two groups of the polymer (2) are chemically bonded to the silicon-based material (1) and the carbon nanotubes (3) respectively, so that bonding force between the silicon-based material (1) and the carbon nanotubes (3) is enhanced and a uniform carbon nanotube (3) coating layer is formed. This can significantly improve conductive performance of the silicon-based material (1), thereby improving cycling performance and rate performance of an electrochemical apparatus.