Mesoporous alumina ceramic coated diaphragm and preparation method thereof

The invention discloses a mesoporous alumina ceramic coated diaphragm and a preparation method thereof, and belongs to the technical field of diaphragms for lithium ion batteries. The mesoporous alumina ceramic coated diaphragm comprises a commercially available diaphragm and mesoporous alumina coated on one side or two sides of the commercially available diaphragm, wherein the mesoporous aluminais generated by carrying out heat treatment on an Al-based MOFs porous coordination polymer material, and the Al-based MOFs porous coordination polymer material is at least one of NH2-MIL-53 (Al), NH2-MIL-101 (Al) and Al-PCP. According to the invention, the liquid absorption capacity and the liquid retention capacity of the mesoporous alumina ceramic coated diaphragm are improved, and the electrical property of the lithium ion battery can be obviously improved when the mesoporous alumina ceramic coated diaphragm is applied to the lithium ion battery. 本发明公开了一种介孔氧化铝陶瓷涂覆隔膜及其制备方法，属于锂离子电池用隔膜技术领域。所述的介孔氧化铝陶瓷涂覆隔膜，包括市售隔膜和涂覆于所述