The present disclosure provides a porous composite ceramic separator comprising a porous ceramic separator substrate comprising inorganic particles and a binder polymer to bind and interconnect the inorganic particles one another; and a coating layer coated on at least one surface of the porous ceramic separator, and comprising a mixture of binder polymer particles and staple fibers.
The porous composite ceramic separator of the present disclosure has high thermal safety by the use of the porous ceramic separator substrate, can prevent tensile strength decline and shows good resistance characteristics and assembly characteristics into an electrochemical device.