公开(公告)号：WO2021263065A1

公开(公告)日：2021-12-30

申请号：PCT/US2021/039015

申请日：2021-06-25

申请人： THE CHEMOURS COMPANY FC, LLC

发明人： YANG, Ruidong ,  MOFFETT, Robert Harvey ,  RAIFORD, Michael W

IPC分类号： H01M8/0221 ,  H01M8/0239 ,  H01M8/18 ,  H01M8/188

摘要： A cation exchange membrane includes a film of fluorinated ionomer containing sulfonate groups. The film has a machine direction and a transverse direction perpendicular to the machine direction. The membrane has a water swell in both the machine direction and the transverse direction of less than about 5%. The membrane has a ratio of in-plane conductivity in the machine direction to in-plane conductivity in the transverse direction of about 0.9 to about 1.1. A process makes a cation exchange membrane including a film of fluorinated ionomer containing sulfonate groups. The process includes forming a film of the ionomer. The process also includes biaxially stretching the film in both a machine direction and a transverse direction perpendicular to the machine direction. An electrochemical cell has anode and cathode compartments and includes a cation exchange membrane as a separator between the anode and cathode compartments.