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.

公开(公告)号：US20230062442A1

公开(公告)日：2023-03-02

申请号：US17974775

申请日：2022-10-27

Applicant: Ningde Amperex Technology Limited

Inventor： Ting YI ,  Zhihuan CHEN ,  Hang CUI ,  Yuansen XIE

IPC: H01M4/38 ,  H01M4/36

Abstract: A composite negative electrode material includes a Si-M-C composite material and graphene on a surface of the Si-M-C composite material, where M includes at least one of boron, nitrogen, or oxygen. Solid state nuclear magnetic resonance testing of the Si-M-C composite material shows that chemical shifts of element silicon include −5 ppm±5 ppm, −35 ppm±5 ppm, −75 ppm±5 ppm, and −110 ppm±5 ppm, and a peak width at half height at −5 ppm±5 ppm satisfies 7 ppm

公开(公告)号：US20230006265A1

公开(公告)日：2023-01-05

申请号：US17940395

申请日：2022-09-08

Applicant: Ningde Amperex Technology Limited

Inventor： Ting ZHANG ,  Daoyi JIANG ,  Hang CUI

IPC: H01M10/0587 ,  H01M10/0525 ,  H01M50/46 ,  H01M4/505 ,  H01M4/525 ,  H01M4/38 ,  H01M4/58 ,  H01M10/04 ,  H01M10/44 ,  H01M50/417 ,  H01M50/426

Abstract: A lithium-ion battery, including a battery cell, an electrolytic solution, and a packaging film. The battery cell is formed by winding a positive electrode plate and a negative electrode plate that are separated by a separator. The lithium-ion battery is half-charged to obtain a half-charged full battery. The half-charged full battery is stripped of the packaging film to obtain a half-charged cell. When a width of the half-charged full battery is w1, a width of the half-charged cell is w2, and g=w2/w1, the following conditional expression (1) is satisfied: 0.4

公开(公告)号：US20220223854A1

公开(公告)日：2022-07-14

申请号：US17708501

申请日：2022-03-30

Applicant: Ningde Amperex Technology Limited

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

IPC: H01M4/38 ,  H01M4/62 ,  H01M4/134

Abstract: A negative electrode material includes silicon-based particles. The silicon-based particles include a silicon-containing matrix and a polymer layer disposed on at least a portion of a surface of the silicon-containing matrix, and the polymer layer includes a carbon material and a polymer; when a thermogravimetric analysis is conducted at a temperature ranging from 0° C. to 800° C., a derivative thermogravimetric curve of the polymer in a free state has at least one characteristic peak, a temperature at the maximum characteristic peak of the at least one characteristic peak is Ti, a derivative thermogravimetric curve of the silicon-based particles has at least one characteristic peak, a temperature at the maximum characteristic peak of the at least one characteristic peak is T2, and T1-T2 is from 1.5° C. to 20° C. A lithium-ion battery prepared from the negative active material has improved cycle performance and deformation resistance, and reduced DC resistance.

公开(公告)号：US20220199969A1

公开(公告)日：2022-06-23

申请号：US17690257

申请日：2022-03-09

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

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

IPC: H01M4/134 ,  H01M4/62

Abstract: An anode material includes a silicon composite substrate, wherein the Dv50 of the silicon composite substrate is from 2.5 μm to 15 μm, and the particle size distribution of the silicon composite substrate meets 0.1≤Dn10/Dv50≤0.6. The anode material has good cycle performance, and the battery prepared with the anode material has good rate performance and lower swelling rate.

公开(公告)号：US20220140322A1

公开(公告)日：2022-05-05

申请号：US17577739

申请日：2022-01-18

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

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

IPC: H01M4/36 ,  H01M4/60 ,  H01M4/48 ,  H01M10/0525

Abstract: An anode material includes silicon-containing particles including a silicon composite substrate and an oxide MeOy layer, wherein the oxide MeOy layer is coated on at least a portion of the silicon composite substrate, wherein Me includes at least one of Al, Si, Ti, Mn, V, Cr, Co or Zr, and y is 0.5 to 3; and wherein the oxide MeOy layer includes a carbon material. The anode material has good cycle performance, and the battery prepared from the anode material has better rate performance and lower swelling rate.

公开(公告)号：US20220223851A1

公开(公告)日：2022-07-14

申请号：US17707129

申请日：2022-03-29

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Ting YI ,  Hang CUI ,  Yuansen XIE

IPC: H01M4/38 ,  H01M4/583 ,  H01M4/62 ,  H01M10/0525

Abstract: A negative electrode includes a negative current collector, a first negative active material layer and a second negative active material layer. The first negative active material layer is arranged on one side of a first portion of the negative current collector, and the second negative active material layers are arranged on two sides of a second portion, different from the first portion, of the negative current collector. A ratio of a weight per unit area of the first negative active material layer to a weight per unit area of the second negative active material layer on the negative current collector is 0.47 to 0.52, and a ratio of a compacted density of the first negative active material layer to a compacted density of the second negative active material layer is 0.9 to 1.1.

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 %.