ELECTROCHEMICAL CELLS HAVING ULTRATHIN SEPARATORS AND METHODS OF MAKING THE SAME

摘要

A method of forming a non-porous, hydrophilic polymer film separator for an electrochemical cell includes the steps of applying a flowable coating composition to the substrate, and converting the flowable coating composition applied to the substrate into the non-porous, hydrophilic polymer film separator. The resulting thin separators can be used for producing electrochemical cells which can provide a large increase in high rate discharge performance, cell capacity, or in combination of both as compared with a conventional cell of the same size.