公开(公告)号：US20240372092A1

公开(公告)日：2024-11-07

申请号：US18778143

申请日：2024-07-19

Applicant: Ningde Amperex Technology Limited

Inventor： Yanyan XU

IPC: H01M4/525 ,  H01M4/02 ,  H01M4/131 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0568 ,  H01M10/0569

Abstract: An electrochemical device includes a positive electrode, a negative electrode, and an electrolyte. The electrolyte includes a fluorine-substituted linear carboxylate ester. Based on a total mass of the electrolyte, a mass percent of the fluorine-substituted linear carboxylate ester is a %, satisfying: 10≤a≤70. The positive electrode includes a positive current collector and a positive active material layer applied onto at least one surface of the positive current collector. The positive active material layer includes a nickel-containing positive active material. Based on a total mass of the positive active material layer, a mass percent of nickel is x %, satisfying: 33≤x≤55. A coating weight of the positive active material applied on the positive current collector is w (mg/cm2), satisfying: 6.5≤w≤19.5, and 1.0≤a/w≤8.2.

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.

公开(公告)号：US20240234815A1

公开(公告)日：2024-07-11

申请号：US18606708

申请日：2024-03-15

Applicant: Ningde Amperex Technology Limited

Inventor： Chunrui XU ,  Yanyan XU ,  Jianming ZHENG ,  Chao TANG

IPC: H01M10/0567 ,  H01M10/0569

CPC classification number: H01M10/0567 ,  H01M10/0569 ,  H01M2300/0034 ,  H01M2300/004

Abstract: An electrolytic solution, an electrochemical device containing the electrolytic solution, and an electronic device. The electrolytic solution includes ethylene carbonate, propylene carbonate, and fluoroethylene carbonate. Based on a mass of the electrolytic solution, a mass percent of the ethylene carbonate is a, a mass percent b of the propylene carbonate is 12% to 35%, a mass percent c of the fluoroethylene carbonate is 0.2% to 2.5%, and the electrolytic solution satisfies 0.1≤a/b≤0.75.

公开(公告)号：US20240282943A1

公开(公告)日：2024-08-22

申请号：US18620055

申请日：2024-03-28

Applicant: Ningde Amperex Technology Limited

Inventor： Chunrui XU ,  Yanyan XU ,  Shaoyun ZHOU

IPC: H01M4/38 ,  H01M4/02 ,  H01M10/0568 ,  H01M10/0569

CPC classification number: H01M4/38 ,  H01M10/0568 ,  H01M10/0569 ,  H01M2004/028 ,  H01M2300/0042 ,  H01M2300/0051

Abstract: An electrochemical apparatus includes a positive electrode plate, a negative electrode plate, a separator, and an electrolyte, where the positive electrode plate includes a positive electrode active material, the positive electrode active material includes element Co, and the electrolyte includes a polynitrile compound. The amount of the polynitrile compound is adjusted according to the amount of element Co in the positive electrode active material, and the polynitrile compound is in coordination complexation with Co with other additives used in combination. The structural stability of the positive electrode material with lithium highly released is significantly improved, inhibiting leaching of Co, reducing oxidization of the electrolyte by the positive electrode active material, and inhibiting related side reactions, thereby effectively improving performance of the electrochemical apparatus under high temperature.