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 nonporous, 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 a combination of both as compared with a conventional cell of the same size.