Composite polymer electrolyte membrane

Details Composite polymer electrolyte membrane Composite polymer electrolyte membrane

1997-03-26

1999-01-12

Diamond, Alan

Compositions

Electrolytes for electrical devices

429190, 429192, 204252, H01M 1040, H01M 618

Patent

active

058582649

ABSTRACT:
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.

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MacFarlane et al. "Structure-Property Relationships in Plasticized Solid Polymer Electrolytes", Electrochimica Acta, vol. 40., No. 13, pp. 2131-2136, Mar. 1995.

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