FUNCTIONALIZED SEPARATOR AND METHOD FOR PREPARING THE SAME, LITHIUM METAL BATTERY AND DEVICE COMPRISING THE SAME

The present application discloses a functionalized separator, a method for preparing the same, a lithium metal battery, and a device comprising the lithium metal battery. The functionalized separator comprises a porous substrate and a functional film layer provided on at least one side of the porous substrate, wherein the functional film layer comprises inorganic particles which are able to reversibly react with metal lithium to form a lithium alloy.