公开(公告)号：US20250023102A1

公开(公告)日：2025-01-16

申请号：US18901349

申请日：2024-09-30

Applicant: Ningde Amperex Technology Limited

Inventor： Junfei LIU ,  Disheng LAN ,  Chao TANG ,  Xiexue PENG

IPC: H01M10/0567 ,  H01M4/02 ,  H01M4/36 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0569

Abstract: An electrolyte includes fluoroethylene carbonate, where a percentage a of the fluoroethylene carbonate is 0.01% to 5% based on mass of the electrolyte; the positive electrode includes a positive electrode active material, where the positive electrode active material contains element Mn, and a percentage of the element Mn is greater than or equal to 15% based on mass of the positive electrode active material; and the positive electrode active material has a unit reaction area c measured in m2/cm2, where a and c satisfy the following relationship: 0.0006≤a/c≤6.25, and the unit reaction area is a product of a weight W of the positive electrode active material per unit area and a specific surface area BET of the positive electrode active material.

公开(公告)号：US20240291036A1

公开(公告)日：2024-08-29

申请号：US18612373

申请日：2024-03-21

Applicant: Ningde Amperex Technology Limited

Inventor： Junfei LIU ,  Shaoyun ZHOU ,  Disheng LAN ,  Yanyan XU

IPC: H01M10/0567 ,  H01M4/02 ,  H01M4/62

CPC classification number: H01M10/0567 ,  H01M4/625 ,  H01M2004/028

Abstract: An electrochemical apparatus includes a positive electrode, a negative electrode, a separator, and an electrolyte, where the positive electrode includes a positive electrode current collector, a positive electrode active substance layer, and a conductive coating disposed between the positive electrode current collector and the positive electrode active substance layer; the electrolyte includes a first fluorine-containing metal salt, where the first fluorine-containing metal salt includes at least one of fluorine-containing sulfonimide lithium salts; and the electrochemical apparatus satisfies the following relationship: 0.1≤X/d≤105, where X g/m2 is mass per unit area of fluorine-containing sulfonimide lithium salt contained in the electrochemical apparatus on one surface of the positive electrode current collector, and d μm is thickness of the conductive coating on one surface of the positive electrode current collector.