NOVELTY - The separator (1) has a coating adhered to a surface of a trilayer separator. The coating comprises an UV or electron beam (EB) cured matrix with a crosslink reaction product obtained from precursors i.e. porous UV-curved binder (6) selected from monomers, oligomers, and combinations of the monomers and oligomer. A ceramic particulate material is bound to the UV or EB cured matrix and to the trilayer separator by the UV or EB cured matrix. The ceramic particulate material is distributed uniformly throughout the UV or EB cured matrix.    USE - Thermoplastic polyethylene (PE)-polypropylene (PP) coated separator for use in an electrochemical device (claimed) i.e. lithium ion secondary battery used as an electrical storage device for various applications. Uses include but are not limited to a hybrid vehicle, electric vehicle, electric grid storage, laptop computer, cellphone and a hand tool.    ADVANTAGE - The separator is porous, mechanically strong, heat resistant, and stable. The separator does not form cracks or cause short circuits due to shrinkage when an electrochemical device is heated or compressed, thus improving an operational safety of the electrochemical device using the separator. The ceramic particulate particle allows thermal conductivity of the separator to be increased without increasing an electrical conductivity of the separator.    DETAILED DESCRIPTION - The precursor comprises a UV water-based mixture, UV curable epoxy, UV curable silicone, UV curable urethane, UV curable rubber, UV curable thioester, acrylated water based resin blend, acrylated polyurethane, acrylated rubber, acrylated monomer, cycloaliphatic epoxy terminated oligomers, cycloaliphatic epoxy terminated monomers, acrylated terminated oligomers and acrylated terminated monomers. An INDEPENDENT CLAIM is also included for a method for making a coating, separator and electrochemical device by UV or EB curing slurries.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of a thermoplastic PE-PP coated separator.    Thermoplastic PE-PP coated separator (1)    Porous separator film (2)    Top side (3)    Bottom side (4)    Porous UV-curved binder (6)