公开(公告)号：US11784306B2

公开(公告)日：2023-10-10

申请号：US17215484

申请日：2021-03-29

Applicant: Ningde Amperex Technology Limited

Inventor： Bing Jiang ,  Kefei Wang

IPC: H01M4/38 ,  H01M4/62 ,  H01M4/66 ,  H01M10/056 ,  H01M10/0562 ,  H01M10/0566 ,  H01M4/02

CPC classification number: H01M4/386 ,  H01M4/625 ,  H01M4/664 ,  H01M10/056 ,  H01M10/0562 ,  H01M10/0566 ,  H01M2004/021 ,  H01M2004/027 ,  H01M2300/0068

Abstract: A negative electrode includes a current collector and an active substance layer arranged on the current collector, and an ionic conductivity of the active substance layer is 0.01 S/m to 1 S/m. The ionic conductivity of the active substance layer is defined as 0.01 S/m to 1 S/m, so that the electrochemical device can meet requirements for fast charging, and meanwhile, lithium plating on a surface of the negative electrode of the electrochemical device can be inhibited in a fast-charging condition, ensuring safety performance of the electrochemical device.

公开(公告)号：US12148876B2

公开(公告)日：2024-11-19

申请号：US17485807

申请日：2021-09-27

Applicant: Ningde Amperex Technology Limited

Inventor： Kefei Wang ,  Bing Jiang

IPC: H01M10/0525 ,  H01M4/04 ,  H01M4/583 ,  H01M4/62 ,  H01M10/0567 ,  H01M10/0568 ,  H01M10/0569 ,  H01M4/02

Abstract: An electrochemical apparatus, including a positive electrode, a negative electrode, and an electrolyte. The negative electrode includes a negative electrode current collector and a negative electrode mixture layer formed on the negative electrode current collector, and the negative electrode mixture layer includes a negative electrode active substance. An elongation at a yield point of the negative electrode mixture layer and D50 of the negative electrode active substance satisfy a specified relationship, and the electrolyte includes a compound having a cyano group.