公开(公告)号：US20200313186A1

公开(公告)日：2020-10-01

申请号：US16534191

申请日：2019-08-07

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Huixin WANG ,  Silin HUANG ,  Sheng CHENG ,  Hongming YU

IPC: H01M4/587 ,  H01M4/525 ,  H01M4/36 ,  H01M4/62 ,  H01M4/38

Abstract: The present application relates to an electrode and an electrochemical device including the electrode. An anode of the present application includes a first anode region and a second anode region, wherein a direct current resistance value RA2 of the second anode region is less than or equal to 98% of a direct current resistance value RA1 of the first anode region. A cathode of the present application includes a first cathode region and a second cathode region, wherein a direct current resistance value RC2 of the second cathode region is greater than a direct current resistance value RC1 of the first cathode region. When the anode and/or the cathode of the present application are/is applied to the electrochemical device, it can effectively reduce the formation of lithium dendrites, thereby improving the safety of the electrochemical device.

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.

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：US20210313563A1

公开(公告)日：2021-10-07

申请号：US16964746

申请日：2020-05-22

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Feilong GUO ,  Juan JIN ,  Xinbing CHEN ,  Hongming YU

IPC: H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M4/131 ,  H01M10/0525

Abstract: The present application relates to a cathode and an electrochemical device. The cathode comprises: a cathode current collector; and a cathode active material layer disposed on a surface of the cathode current collector, wherein the cathode active material layer comprises a first particle and a second particle, the first particle comprising a secondary particle composed of a third particle, the third particle being a primary particle, the first particle having an average particle size of 5 μm to 20 μm, the third particle having an average particle size of 200 nm to 700 nm, the second particle comprising a fourth particle and/or a secondary particle composed of the fourth particle, the fourth particle being a primary particle, the second particle having an average particle size of 3 μm to 5 μm, the fourth particle having an average particle size of 800 nm to 5 μm, the first particle being contained in a region close to the cathode current collector, and the second particle being contained in a region away from the cathode current collector. The cathode can significantly improve the rate performance, cycle performance and safety performance of the electrochemical device.

公开(公告)号：US20200313176A1

公开(公告)日：2020-10-01

申请号：US16534326

申请日：2019-08-07

Applicant: NINGDE AMPEREX TECHNOLOGY LIMITED

Inventor： Huixin WANG ,  Silin HUANG ,  Sheng CHENG ,  Hongming YU

IPC: H01M4/38 ,  H01M4/133 ,  H01M10/0525

Abstract: The present application relates to an electrode and an electrochemical device including the electrode. The electrode includes a first region and a second region, wherein the electrode includes a substrate and an electrode active material coated on at least one surface of the substrate, and wherein the charge/discharge thickness difference of the electrode in the first region is ΔD1, and the charge/discharge thickness difference of the electrode in the second region is ΔD2, wherein ΔD1 is less than ΔD2. When the electrode of the present application is applied to the electrochemical device, the formation of lithium dendrites can be effectively reduced, and the safety of the electrochemical device can be improved.