公开(公告)号：US20230231129A1

公开(公告)日：2023-07-20

申请号：US18002596

申请日：2021-06-23

Applicant: SAFT

Inventor： Cécile TESSIER ,  Patrick BERNARD ,  Kamen NECHEV ,  Carine STEINWAY ,  Xilin CHEN ,  Cédric GOUSSET ,  Sylvie HERREYRE

IPC: H01M4/58 ,  H01M10/052 ,  H01M4/505 ,  H01M4/525 ,  H01M50/578 ,  H01M50/581

CPC classification number: H01M4/5825 ,  H01M10/052 ,  H01M4/505 ,  H01M4/525 ,  H01M50/578 ,  H01M50/581 ,  H01M2220/20 ,  H01M2004/021

Abstract: The use of a blend of a lithium nickel oxide and a lithium manganese iron phosphate as an active material composition in the cathode of a lithium secondary electrochemical cell for automotive applications, such as hybrid and electric vehicles. This blend allows decreasing the porosity of a lithium manganese iron phosphate-based cathode. It also allows improving the detectability of a gas release in the cell in case of an abnormal operation of the cell. It allows lowering the cell impedance at a low state of charge, typically less than 30%, and reducing the impedance increase of the cell during the cell lifespan.