NON-AQUEOUS FLOW CELL COMPRISING A POLYURETHANE SEPARATOR

摘要

A non-aqueous flow cell energy storage device comprises a ionically conductive separator, which separator comprises a polyurethane prepared by curing an isocyanate capped prepolymer, which prepolymer was prepared from a polyol having polycarbonate backbone, wherein the separator may be impregnated with electrolyte salts and/or swelled by an organic solvent.

主权项

1. A non-aqueous flow cell comprising an anode region, a cathode region and an ion permeable separator comprising a polyurethane separator situated between the anode region and cathode region wherein:
the anode region comprises an anode chamber, a current collector residing within the anode chamber, and a non-aqueous flowable organic electrolyte in the form of a solution, slurry or dispersion comprising an organic redox active compound that releases electrons during discharge of the cell and an organic solvent, the cathode region comprises a cathode chamber, a current collector residing within the cathode chamber, and a non-aqueous flowable organic electrolyte in the form of a solution, slurry or dispersion comprising an organic redox active compound that accepts electrons during discharge of the cell and an organic solvent, the separator comprises a polycarbonate based polyurethane prepared by curing a mixture comprising an isocyanate terminated pre-polymer having a polycarbonate backbone, wherein the anode electrolyte, the cathode electrolyte and the separator each comprise less than 10% by weight of water.