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.

公开(公告)号：US20180145314A1

公开(公告)日：2018-05-24

申请号：US15571872

申请日：2016-05-18

Applicant: SAFT

Inventor： Erwan DUMONT ,  Frédéric CASTAING ,  Cécile TESSIER

IPC: H01M4/36 ,  H01M4/58 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525

CPC classification number: H01M4/364 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M10/0525 ,  H01M2004/028

Abstract: A composition of active material for a positive electrode of a lithium-ion electrochemical cell is provided comprising: (a) a lithiated oxide of formula Li1+xMO2 in which: 0≤x≤0.15, M designates NiaMnbCocM′d where a>0; b>0; c>0; d≥0 and a+b+c+d=1; M′ being chosen from B, Mg, Al, Si, Ca, Ti, V, Cr, Fe, Cu, Zn, Y, Zr, Nb, Mo or a mixture of these; (b) a lithiated phosphate of formula LiMn1−yM″yPO4 where M″ represents at least one element chosen from the group consisting of Fe, Ni, Co, Mg and Zn; and 0

公开(公告)号：US20200266492A1

公开(公告)日：2020-08-20

申请号：US16647979

申请日：2018-10-01

Applicant: SAFT

Inventor： Erwan DUMONT ,  Frédéric CASTAING ,  Benjamin LE GUERN ,  Fabrice RENE ,  Michel ULLDEMOLINS ,  Cécile TESSIER ,  Jean-Paul PERES ,  Florent FISCHER

IPC: H01M10/0569 ,  H01M2/16 ,  H01M4/62 ,  H01M4/74 ,  H01M10/0525

Abstract: A lithium-ion electrochemical cell comprising: at least one negative electrode comprising an active material having an operating potential greater than or equal to 1 V with respect to the potential of the electrochemical couple Li+/Li; at least one positive electrode; the negative electrode and/or the positive electrode comprising a binder selected from polytetrafluoroethylene, polyamideimide, polyimide, styrene-butadiene rubber and polyvinyl alcohol or a mixture thereof; a liquid electrolyte comprising a solvent which is an ionic liquid; a separator having a shrinkage of less than or equal to 3% in the direction of its length and in the direction of its width, after exposure to a temperature of 200° C. for a period of at least one hour. This electrochemical cell can be used in charge or discharge at a temperature ranging from room temperature to 150° C. or higher.