公开(公告)号：US20240332619A1

公开(公告)日：2024-10-03

申请号：US18619244

申请日：2024-03-28

Applicant: Ningde Amperex Technology Limited

Inventor： Junhua JIAN ,  Xiang WANG ,  Hefeng GUO ,  Chao TANG

IPC: H01M10/0567 ,  H01M4/02 ,  H01M4/04 ,  H01M4/38 ,  H01M10/0569

CPC classification number: H01M10/0567 ,  H01M4/0404 ,  H01M4/386 ,  H01M10/0569 ,  H01M2004/027

Abstract: An electrolyte includes a non-aqueous organic solvent and an additive A, where the additive A includes a salt composed of anions and cations represented by formula (I); M1 is selected from group IIIA elements, and cations include any one of Li+, Na+, K+, Mg2+, Ca2+, and Zn2+; and based on a mass of the electrolyte, a mass percentage of the additive A is x %, with 0.01≤x≤60. The electrolyte with the additive A included and its mass percentage controlled within the range defined in this application can enhance the stability of the negative electrode interface and the positive electrode interface, reducing the high-temperature gas production of the electrolyte and thereby improving the high-temperature cycling performance and high-temperature storage performance of the secondary battery.