A composite polymer electrolyte membrane which includes an ion-conductive polymer gel contained and supported by a matrix material formed of a porous polytetrafluoroethylene membrane. The porous polytetrafluoroethylene membrane has an internal structure which defines a three-dimensional network of interconnected passages and pathways throughout the membrane. The composite polymer electrolyte membrane has a tensile break strength of at least 10 MPa in at least two orthogonal planar directions, ion conductivity of at least 1 mS/cm, and is useful as a separator between electrodes of a lithium secondary cell.
申请公布号
US5858264(A)
申请公布日期
1999.01.12
申请号
US19970824864
申请日期
1997.03.26
申请人
JAPAN GORE-TEX, INC.;NIPPON TELEGRAPH AND TELEPHONE CORPORATION