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.

公开(公告)号：US20240332620A1

公开(公告)日：2024-10-03

申请号：US18621143

申请日：2024-03-29

Applicant: Ningde Amperex Technology Limited

Inventor： Shan ZHANG ,  Jianyu LIU ,  Lanjie JIANG ,  Chao TANG

IPC: H01M10/0567 ,  H01M10/0525 ,  H01M10/0568

CPC classification number: H01M10/0567 ,  H01M10/0525 ,  H01M10/0568 ,  H01M2300/0025

Abstract: An electrochemical apparatus includes a positive electrode plate and an electrolyte. The positive electrode plate includes a positive electrode current collector and a positive electrode material layer disposed on at least one surface of the positive electrode current collector, the positive electrode material layer includes a positive electrode active material, and the positive electrode active material contains cobalt and nickel, where based on a mass of the positive electrode active material, a mass percentage of the nickel is B %, where 0.05≤B≤20. The electrolyte includes lithium bis(oxalato) borate and 1,3,6-hexanetricarbonitrile, where based on a mass of the electrolyte, a mass percentage of the lithium bis(oxalato) borate is C % and a mass percentage of the 1,3,6-hexanetricarbonitrile is D %. The electrochemical apparatus satisfies 0.1≤(C+D)/B≤23.