LITHIUM-ION CONDUCTING SEPARATOR MEMBRANE

A ceramic polymer separator, an electrochemical cell comprising the ceramic polymer separator, and a method of preparing the same are provided. The ceramic polymer separator is a lithium-ion conducting and electrically insulating membrane for use in an electrochemical cell, including a rechargeable solid-state lithium-ion battery. The membrane is a composite material composed of a non-woven substrate with a ceramic polymer composite material embedded within the pores and on the substrate surface. The novel separator material is combined with electrodes to form a rechargeable solid-state lithium-ion battery.