Preparation and Property of High Heat-Resistant Ceramic Composited PET Separator

摘要

Polyethylene terephthalate (PET)-Al_2O_3 ceramic composited separator is prepared with organic adhesives PDA, inorganic adhesives, silane-coupling agent, and colloidal silica. The obtained separator is characterized in different ways. Morphology characterization by SEM shows that porous separator is obtained, and Al_2O_3 is evenly distributed on it. The Gurley number of the separator is 8 s/100 cc. Thermal behavior investigation and linear sweep voltammetry test show that the prepared separator has an outstanding thermal performance and electrochemical stability. Half-cell assembled with the composited separator reveals an outstanding cycle performance and a good rate performance. Therefore, the separator may be a suitable and excellent candidate for application in power battery, especially the one with higher safety.