公开(公告)号：US20240154168A1

公开(公告)日：2024-05-09

申请号：US18379188

申请日：2023-10-12

Applicant: Ningde Amperex Technology Limited

Inventor： Lilan ZHANG ,  Mengyan LIN ,  Shan ZHANG ,  Chao TANG

IPC: H01M10/0567 ,  H01M4/36 ,  H01M4/38 ,  H01M4/583

CPC classification number: H01M10/0567 ,  H01M4/366 ,  H01M4/386 ,  H01M4/583 ,  H01M2004/027

Abstract: An electrochemical device includes a positive electrode plate and an electrolytic solution. The electrolytic solution includes a phosphorus additive represented by Formula I:




A mass percent of the phosphorus additive represented by Formula I in the electrolytic solution is A %. The electrolytic solution further includes a first additive. The first additive includes at least one of fluoroethylene carbonate or vinylene carbonate. The positive electrode plate includes a positive active material; the positive active material includes an M element; the M element includes at least one of Al, Mg, Ti, or B; a mass percent of the M element in the positive active material is X %; and 0.0001≤X/A≤40. The electrochemical device is highly stable to thermal shocks.