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：US20230049766A1

公开(公告)日：2023-02-16

申请号：US17963564

申请日：2022-10-11

Applicant: Ningde Amperex Technology Limited

Inventor： Jia Tang ,  Lihong He ,  Pengyang Feng ,  Yuansen Xie

IPC: H01M4/04 ,  H01M50/46

Abstract: A negative electrode active material having a specific aspect ratio and sphericity in a cumulative particle volume distribution. When tested by using a dynamic particle image analyzer, when a cumulative particle volume distribution of the negative electrode active material is 10%, an aspect ratio AR10 of the negative electrode active material satisfies 0.4≤AR10≤0.55, and a sphericity S10 of the negative electrode active material satisfies 0.48≤S10≤0.60. The negative electrode active material improves rate performance, dynamics performance, and a deformation problem of the electrochemical apparatus.

公开(公告)号：US20220231273A1

公开(公告)日：2022-07-21

申请号：US17707697

申请日：2022-03-29

Applicant: Ningde Amperex Technology Limited

Inventor： Ting Yi ,  Hang Cui ,  Yuansen Xie

IPC: H01M4/134

Abstract: A negative electrode material, including an oxygen-containing silicon material. In a Raman spectrum of the oxygen-containing silicon material, IA represents a peak intensity at a corresponding peak position of 140 cm−1±10 cm−1 in the Raman spectrum, ID represents a peak intensity at a corresponding peak position of 470 cm−1±10 cm−1 in the Raman spectrum, and IE represents a peak intensity at a corresponding peak position of 510 cm−1±10 cm−1 in the Raman spectrum; and 0

公开(公告)号：US11322743B2

公开(公告)日：2022-05-03

申请号：US16172852

申请日：2018-10-28

Applicant: Ningde Amperex Technology Limited

Inventor： Peng Du ,  Yuansen Xie ,  Yisong Su ,  Fan Yang

IPC: H01M10/0525 ,  H01M4/583 ,  H01M4/587 ,  H01M4/36 ,  H01M4/48 ,  H01M4/505 ,  H01M4/525 ,  H01M4/04 ,  H01M4/02

Abstract: The present application relates to a negative electrode composite material and preparation thereof and a lithium ion battery. The negative electrode composite material comprises an active material, a metal oxide on the surface of the active material, wherein the ratio of the specific surface area of the negative electrode composite material to the specific surface area of the active material is 1-7. The present application improves the volume energy density and safety performance of a lithium ion battery by selecting a ratio of a specific surface area of the negative electrode composite material to the active material.

公开(公告)号：US11114666B2

公开(公告)日：2021-09-07

申请号：US16548855

申请日：2019-08-23

Applicant: Ningde Amperex Technology Limited

Inventor： Hang Cui ,  Taiqiang Chen ,  Yuansen Xie

IPC: H01M4/587 ,  H01M4/36 ,  H01M4/62 ,  H01M10/0525 ,  H01M10/0587 ,  H01M4/02

Abstract: The present invention provides a modified graphite negative electrode material, preparation method thereof and a secondary battery. The modified graphite negative electrode material includes a graphite and a multilayer graphene. The multilayer graphene are dispersed in the graphite. The multilayer graphene are loaded with a conductive agent by bonding of a binder. The modified graphite negative electrode material can achieve a higher compaction density for the negative electrode, and can effectively improve the lithium precipitation of the negative electrode of the secondary battery while improving the cycle performance of the secondary battery when being applied to the secondary battery.

公开(公告)号：US11059724B2

公开(公告)日：2021-07-13

申请号：US16528242

申请日：2019-07-31

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Ting Yi ,  Chengbo Zhang ,  Hang Cui ,  Yuansen Xie

IPC: C01B33/20 ,  C01B33/22 ,  C01B33/26 ,  H01M4/1395 ,  H01M10/0525

Abstract: The present application relates to a porous material and preparation methods thereof, and anodes and devices including the same. The porous material provided by the present application includes a material of the formula SiaMbOx, wherein the ratio of x to a is about 0.6 to about 1.5, and the ratio of a to b is about 8 to about 10,000, wherein M includes at least one selected from the group consisting of Al, Si, P, Mg, Ti and Zr. The anode and an electrochemical device including the porous material exhibit higher rate performance, higher first coulombic efficiency, higher cycle stability and lower cycle expansion ratio.

公开(公告)号：US12266786B2

公开(公告)日：2025-04-01

申请号：US17460736

申请日：2021-08-30

Applicant: Ningde Amperex Technology Limited

Inventor： Qunchao Liao ,  Hang Cui ,  Yuansen Xie

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

Abstract: A negative electrode includes silicon-based particles and graphite particles, where a quantity of graphite particles present within a vertical distance of about 0 to 6 μm to respective edges of the silicon-based particles is N, and based on a total quantity of the silicon-based particles, more than about 50% of the silicon-based particles satisfy: 6≤N≤17. The negative electrode has good cycle performance, and a battery prepared by using the negative electrode has good rate performance and a low deformation rate.

公开(公告)号：US20250046784A1

公开(公告)日：2025-02-06

申请号：US18793181

申请日：2024-08-02

Applicant: Ningde Amperex Technology Limited

Inventor： Fujin Tan ,  Zigui Zheng ,  Wenlong Shao ,  Yuansen Xie

IPC: H01M4/133 ,  H01M4/02 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0569

Abstract: An electrochemical device includes a negative electrode plate and an electrolyte solution. The negative electrode plate includes a negative current collector and a negative active material layer, and the negative active material layer is located on the negative current collector. The negative active material layer includes a negative active material, the negative active material includes hard carbon and graphite, and a mass percent of the hard carbon in the negative active material is w. The electrolyte solution includes at least one of ethyl propionate or propyl propionate. A mass percent of the ethyl propionate and/or propyl propionate in the electrolyte solution is v, 5≤v/w≤21. The synergistic effect between the hard carbon and the electrolyte solvent enables the electrochemical device to meet requirements of both a high energy density and cost-effectiveness, and improves the low-temperature performance and C-rate performance of the electrochemical device.

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：US12119486B2

公开(公告)日：2024-10-15

申请号：US17362581

申请日：2021-06-29

Applicant: Ningde Amperex Technology Limited

Inventor： ChengBo Zhang ,  Ting Yi ,  Hang Cui ,  Yuansen Xie

IPC: H01M4/48 ,  H01M4/04 ,  H01M4/583

CPC classification number: H01M4/48 ,  H01M4/0471 ,  H01M4/583

Abstract: An anode material includes a lithiated silicon oxide material and a MySiOz layer. The lithiated silicon oxide material includes Li2SiO3, Li2Si2O5 or a combination thereof, and the MySiOz layer coats the lithiated silicon oxide material; M includes Mg, Al, Zn, Ca, Ba, B or any combination thereof; and 0