Patent ID: 6030422
Filing Date: 2000-02-29
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
A method of providing an electrochemical cell, comprising the steps of:a) providing an anode;b) providing a cathode operatively associated with and proximate to the anode so that during electrochemical reactions of the cell, ions migrate between and to the anode and the cathode;c) positioning a separator between the anode and the cathode operatively associated with each other, the separator preventing internal electrical short circuit conditions while providing for ion flow between and to the anode and the cathode, through the separator;d) providing a continuous fabric of a substantially ion impermeable material having a pattern of perforations therethrough, wherein each perforation is of a desired shape and wherein the continuous fabric is of a woven fiberglass cloth impregnated with at least one synthetic resinous fluorine-containing polymer;e) superposing the continuous fabric with at least a portion of the separator to provide for ion flow through the perforations of the fabric in a controlled amount dictated by the percentage of open area provided by the perforations; andf) activating the operatively associated anode and the cathode with an electrolyte.