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.