US 5,665,265 A · Non woven gel electrolyte for electrochemical cells

Abstract

An electrolyte system (40) for use in connection with an electrochemical cell (10). The cell (10) includes a positive electrode (20) and a negative electrode (30) with the electrolyte system (40) disposed therebetween. The electrolyte system is a polymer gel electrolyte system including a liquid electrolyte species which may be either aqueous or non-aqueous and a polymer gel electrolyte support structure. The polymer gel electrolyte support structure includes at least an non woven first polymer and a second polymer which is adapted to absorb the electrolyte active species. The first polymer is a fibrous polymer to reduce swelling of the gel electrolyte in the presence of the electrolyte active species, and further to enhance mechanical integrity of the support structure.

Claims14

Dependent claims

A polymer gel electrolyte system for use in an electrochemical cell having positive and negative electrodes, said polymer gel electrolyte system comprising:

an electrolyte active species adapted to promote ion transport between said positive and said negative electrodes;
and
a polymer support structure comprising an inert, non woven first polymer component and a gelling second polymer component, said gelling second polymer selected from the group consisting of polyvinylidene fluoride (PVDF), polyurethane, polyvinyl acetate, polyvinylpyrrolidinone, copolymers of any of the foregoing, and combinations thereof.

A polymer gel electrolyte system for use in an electrochemical cell having positive and negative electrodes, said polymer gel electrolyte system comprising:

a liquid electrolyte active species for promoting ion transport between said positive and said negative electrodes;
and
a polymer support structure including at least a non woven, first polymer for enhancing mechanical integrity of the polymer support structure, said first polymer selected from the group consisting of polyethylene, polypropylene, polytetrafluoroethylene, polystyrene, polyethyleneterephthalate, nylon, and combinations thereof, and a gelling second polymer for absorbing said electrolyte active species, said second polymer being selected from the group consisting of polyvinylidene fluoride (PVDF), polyurethane, polyvinyl acetate, polyvinylpyrrolidinone, copolymers of any of the foregoing, and combinations thereof.

Dependencies are inferred from the claim text.

Non woven gel electrolyte for electrochemical cells

Life of this patent

Non woven gel electrolyte for electrochemical cells

Life of this patent

Abstract

Claims14