公开(公告)号：US20230343946A1

公开(公告)日：2023-10-26

申请号：US18342044

申请日：2023-06-27

Applicant: Ningde Amperex Technology Limited

Inventor： Daoyi JIANG ,  Zhihuan CHEN

IPC: H01M4/62 ,  H01M4/583 ,  H01M4/48

CPC classification number: H01M4/48 ,  H01M4/583 ,  H01M4/622 ,  H01M2004/027

Abstract: A negative electrode material includes silicon monoxide particles. A molar ratio A of oxygen to silicon on a surface of the silicon monoxide particle is greater than a molar ratio B of oxygen to silicon inside the silicon monoxide particle, so that the molar ratio A of oxygen to silicon on the surface of the silicon monoxide particle and a molar ratio B of oxygen to silicon at any point above 25 nm from the surface of the silicon monoxide particle satisfy A/B > 1.5, allowing the electrochemical apparatus to have a smaller volume swelling and better cycling performance during charge and discharge cycles.

公开(公告)号：US20230343943A1

公开(公告)日：2023-10-26

申请号：US18342039

申请日：2023-06-27

Applicant: Ningde Amperex Technology Limited

Inventor： Zhihuan CHEN ,  Daoyi JIANG

IPC: H01M4/38 ,  H01M4/62 ,  H01M10/0525 ,  H01M4/134 ,  C01B33/18

CPC classification number: H01M4/386 ,  H01M4/625 ,  H01M4/622 ,  H01M10/0525 ,  H01M4/134 ,  C01B33/18 ,  H01M2004/027

Abstract: A negative electrode material including a silicon compound SiOx, a first conductive layer, and a second conductive layer; where 0.5≤x≤1.5; at least part of the first conductive layer is present between the silicon compound and the second conductive layer; and the first conductive layer includes graphene, and the second conductive layer includes carbon nanotubes. This application further provides a negative electrode material different from the above negative electrode material in that the first conductive layer includes carbon nanotubes and the second conductive layer includes graphene. An electrochemical apparatus having the negative electrode material combines the advantages of graphene and carbon nanotubes, to obtain long cycle life and low swelling rate.

公开(公告)号：US20220223850A1

公开(公告)日：2022-07-14

申请号：US17707059

申请日：2022-03-29

Applicant: Ningde Amperex Technology Limited

Inventor： Zhihuan CHEN ,  Daoyi JIANG ,  Hang CUI ,  Yuansen XIE

IPC: H01M4/38 ,  H01M4/04 ,  H01M4/583 ,  H01M10/0525

Abstract: A negative electrode includes a current collector and a coating located on the current collector. The coating includes silicon-based particles and graphite particles. The silicon-based particles include a silicon-containing substrate and a polymer layer. The polymer layer includes a polymer and carbon nanotubes. The polymer layer is located on at least a part of a surface of the silicon-containing substrate. A minimum value of film resistances at different positions on a surface of the coating is R1, a maximum value of the film resistances is R2, an R1/R2 ratio is M, and a percentage of a weight of the silicon-based particles in a total weight of the silicon-based particles and the graphite particles is N, where M≥0.5, and N is 2 wt %-80 wt %.

公开(公告)号：US20250079442A1

公开(公告)日：2025-03-06

申请号：US18953394

申请日：2024-11-20

Applicant: Ningde Amperex Technology Limited

Inventor： Zhihuan CHEN ,  Daoyi JIANG ,  Hang CUI ,  Yuansen XIE

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

Abstract: An 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.

公开(公告)号：US20220199986A1

公开(公告)日：2022-06-23

申请号：US17690159

申请日：2022-03-09

Applicant: Ningde Amperex Technology Limited

Inventor： Ting ZHANG ,  Daoyi JIANG ,  Zhihuan CHEN ,  Hang CUI

IPC: H01M4/36 ,  H01M4/62 ,  H01M4/48 ,  H01M10/0525

Abstract: A negative electrode material includes silicon-based particles. The silicon-based particles include a silicon-containing substrate and a polymer layer. The polymer layer exists on at least a part of a surface of the silicon-containing substrate. The polymer layer includes carbon nanotubes and alkali metal ions. The alkali metal ions include Li+, Na+, K+, or any combination thereof. Based on a total weight of the silicon-based particles, a content of the alkali metal ions is approximately 50˜5,000 ppm. A lithium-ion battery prepared by using the negative active material achieves a lower resistance, higher first-time efficiency, higher cycle performance, and higher rate performance.

公开(公告)号：US20220199975A1

公开(公告)日：2022-06-23

申请号：US17690272

申请日：2022-03-09

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Zhihuan CHEN ,  Ting YI ,  Daoyi JIANG ,  Hang CUI

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/587 ,  H01M4/62 ,  H01M10/0525

Abstract: A negative electrode composite material includes a Si—M—C composite material. A conductive layer exists on a surface of the Si—M—C composite material, M includes at least one of boron, nitrogen, or oxygen. Chemical shifts of a silicon element in the Si—M C composite material as measured in a solid-state nuclear magnetic resonance test include −5 ppm±5 ppm, −35 ppm±5 ppm, −75 ppm±5 ppm, −110 ppm±5 ppm. A peak width at half height at −5 ppm±5 ppm is K, and K satisfies: 7 ppm

公开(公告)号：US20230343937A1

公开(公告)日：2023-10-26

申请号：US18342020

申请日：2023-06-27

Applicant: Ningde Amperex Technology Limited

Inventor： Daoyi JIANG ,  Zhihuan CHEN

IPC: H01M4/36 ,  H01M4/587 ,  H01M4/38 ,  H01M4/134 ,  H01M4/133 ,  C01B33/02

CPC classification number: H01M4/366 ,  H01M4/587 ,  H01M4/386 ,  H01M4/134 ,  H01M4/133 ,  C01B33/02 ,  H01M2004/021

Abstract: A silicon-carbon composite particle includes a silicon-based particle and a plurality of graphite particles on surface of the silicon-based particle, where the graphite particles have a particle size of M μm, the silicon-based particle has a particle size of N μm, M

公开(公告)号：US20220199985A1

公开(公告)日：2022-06-23

申请号：US17690148

申请日：2022-03-09

Applicant: Ningde Amperex Technology Limited

Inventor： Ting ZHANG ,  Zhihuan CHEN ,  Daoyi JIANG ,  Hang CUI

IPC: H01M4/36 ,  H01M4/38 ,  H01M4/62

Abstract: An anode material includes silicon-based particles, the silicon-based particles include a silicon-containing substrate, at least a part of the surface of the silicon-containing substrate has: (i) a polymer layer, and/or (ii) an amorphous carbon layer, and the polymer layer or the amorphous carbon layer includes carbon nanotubes, the silicon-based particles include metal elements, the metal elements include Fe, Cu, Zn, Ni, Co, or any combination thereof; wherein the content of the metal elements selected from Fe, Cu, Zn, Ni, Co, or any combination thereof is less than about 2500 ppm based on the total weight of the silicon-based particles. A lithium ion battery with the anode active material has a reduced impedance and K value, and improved first efficiency and cycle performance.

公开(公告)号：US20220173386A1

公开(公告)日：2022-06-02

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 ,  H01M10/0525 ,  H01M4/587 ,  H01M4/48

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：US20220158176A1

公开(公告)日：2022-05-19

申请号：US17585976

申请日：2022-01-27

Applicant: Ningde Amperex Technology Limited

Inventor： Daoyi JIANG ,  Zhihuan CHEN ,  Hang CUI ,  Yuansen XIE

IPC: H01M4/36 ,  H01M4/485 ,  H01M4/60 ,  H01M10/0525 ,  H01M4/62

Abstract: An anode material includes a lithiated silicon oxide material, an inorganic coating layer, and a polymer coating layer, wherein the inorganic coating layer and the lithiated silicon oxide material at least have Si—O-M bonds therebetween, and M includes at least one of an aluminum element, a boron element, and a phosphorus element. The anode material has high water stability, high first coulombic efficiency, and good cycle stability.