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：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：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：US12294082B2

公开(公告)日：2025-05-06

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 ,  H01M4/02

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：US20230080891A1

公开(公告)日：2023-03-16

申请号：US17986046

申请日：2022-11-14

Applicant: Ningde Amperex Technology Limited

Inventor： Congrong Chen ,  Zhihuan Chen ,  Hang Cui ,  Yuansen Xie

IPC: H01M50/126 ,  B32B7/12 ,  B32B5/02 ,  B32B27/12 ,  B32B15/14 ,  B32B27/34 ,  B32B27/36 ,  B32B27/32 ,  B32B27/18 ,  H01M50/105 ,  H01M50/119 ,  H01M50/122 ,  H01M50/121 ,  H01M50/128 ,  H01M50/129 ,  H01M50/133 ,  H01M4/38 ,  H01M4/48 ,  H01M4/36 ,  H01M4/587

Abstract: A packaging film including a protective layer, a first bonding layer, a metal layer. a second bonding layer and a sealing layer. The protective layer, the first bonding layer, the metal layer. the second bonding layer, and the sealing layer are sequentially stacked. The protective layer includes a polymer resin layer and a carbon material.

公开(公告)号：US20230034212A1

公开(公告)日：2023-02-02

申请号：US17951525

申请日：2022-09-23

Applicant: Ningde Amperex Technology Limited

Inventor： Chao Wang ,  Qunchao Liao ,  Hang Cui ,  Yuansen Xie

IPC: H01M4/485

Abstract: A negative electrode material includes a silicon-based material, where for a test cell including an electrode containing the negative electrode material and a counter electrode made of lithium metal, first-cycle efficiency of the test cell is 81% to 86%, and a discharge capacity at an electric potential of the electrode in the test cell being 0.17V accounts for 35% to 65% of a first-cycle discharge capacity of the test cell. A lithiation platform of particles of a silicon-based material is so defined that a lithiation capacity when an electric potential of the silicon-based negative electrode material in a test half cell is 0.17V accounts for 35% to 65% of a first-cycle lithiation capacity of the test half cell, thereby ensuring amorphous characteristics of the silicon-based material, significantly improving cycling performance of the negative electrode material, and reducing a swelling rate of an electrode assembly during cycling.

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：US20210328215A1

公开(公告)日：2021-10-21

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

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