公开(公告)号：US20250140796A1

公开(公告)日：2025-05-01

申请号：US19005443

申请日：2024-12-30

Applicant: Ningde Amperex Technology Limited

Inventor： Yuhan HU ,  Yafei ZHANG

IPC: H01M4/36 ,  H01M4/02 ,  H01M4/133 ,  H01M4/134 ,  H01M4/38 ,  H01M4/583

Abstract: An active material layer is provided with at least one first pore structure, and the active material layer satisfies the following conditions: (a) 0≤M/d≤0.5, where M is a mass percentage of the first active material in the active material layer, and d is a ratio of a depth of the first pore structure to a thickness of the active material layer; and (b) −1%≤0.2M−S≤3%, where S is a porosity of the active material layer. Adding the first active material with a larger gram capacity can increase the capacity of the electrochemical apparatus.

公开(公告)号：US20220223916A1

公开(公告)日：2022-07-14

申请号：US17709661

申请日：2022-03-31

Applicant: Ningde Amperex Technology Limited

Inventor： Yafei ZHANG

IPC: H01M10/0568 ,  H01M10/0525 ,  H01M4/38

Abstract: An electrolyte includes a fluorine-containing lithium salt and lithium dicyanamide, and the fluorine-containing lithium salt includes lithium fluorosulfonyl(trifluoromethanesulfonyl)imide. According to embodiments of this application, the electrolyte is improved, so that a lithium salt includes the lithium fluorosulfonyl(trifluoromethanesulfonyl)imide and the lithium dicyanamide, thereby helping to enhance stability of a solid electrolyte interface (SEI) film of a negative electrode. In this way, cycling performance of the electrochemical apparatus is improved, and dynamic performance of the electrolyte is basically not affected.

公开(公告)号：US20240014390A1

公开(公告)日：2024-01-11

申请号：US18175929

申请日：2023-02-28

Applicant: Ningde Amperex Technology Limited

Inventor： Yafei ZHANG ,  Chenxi JIANG ,  Hongming YU ,  Yuansen XIE

IPC: H01M4/48 ,  H01M4/134 ,  H01M4/62 ,  H01M10/0525 ,  H01G11/22 ,  H01G11/52 ,  H01G11/70

CPC classification number: H01M4/48 ,  H01M4/134 ,  H01M4/625 ,  H01M10/0525 ,  H01G11/22 ,  H01G11/52 ,  H01G11/70 ,  H01M2004/027

Abstract: An electrochemical apparatus includes a positive electrode plate, a negative electrode plate, and a separator disposed between the positive electrode plate and the negative electrode plate, where the negative electrode plate includes a negative electrode current collector and a negative electrode active substance layer disposed on the negative electrode current collector, where the electrochemical apparatus has a first capacity a in the unit of mAh, the first capacity a is greater than 0, and the first capacity a represents a capacity when a battery that is prepared using the negative electrode plate and a lithium plate as a counter electrode of the negative electrode plate is charged to 2.0 V after the electrochemical apparatus has been discharged from a 100% state of charge (SOC) to 2.5 V.

公开(公告)号：US20230043554A1

公开(公告)日：2023-02-09

申请号：US17951375

申请日：2022-09-23

Applicant: Ningde Amperex Technology Limited ,  Dongguan Amperex Technology Limited

Inventor： Chenxi JIANG ,  Yafei ZHANG ,  Yuansen XIE ,  Hongming YU

IPC: H01M4/38 ,  H01M10/052

Abstract: A negative electrode material includes silicon composite particles. The silicon composite particles include amorphous silicon particles and a buffer phase. The amorphous silicon particles are dispersed in the buffer phase. A non-uniformity of the amorphous silicon particles dispersed in the buffer phase is less than or equal to 30%. Also, an electronic device including the negative electrode material.